Variable Threshold, Gain, Or Slice Level Patents (Class 382/270)
  • Patent number: 9794493
    Abstract: There is provided an image capturing apparatus comprising an image capturing unit. A control unit controls the image capturing unit to capture a first image having exposure unevenness caused by flicker in a light source. A detection unit detects a timing at which there is a low change in a light amount caused by the flicker, based on the exposure unevenness in the first image. An accepting unit accepts an image capturing instruction. The control unit controls the image capturing unit to capture a second image at the detected timing in response to the image capturing instruction.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: October 17, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Ariga
  • Patent number: 9788786
    Abstract: Disclosed herein are systems and methods for automatic detection of clinical relevance of images of an anatomical situation. The method includes comparing a first image and a second image and determining whether a difference between the first and second images is at least one of a local type difference and a global type difference. The local type difference is a local difference of the first image and the second image and the global type difference is a global difference between the first image and the second image. The second image is determined as having a clinical relevance if it is determined that the difference between the first image and the second image comprises a local type difference.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: October 17, 2017
    Assignee: Stryker European Holdings I, LLC
    Inventors: Udo Pfrengle, Michael Kohnen, Arno Blau, Thomas Epting
  • Patent number: 9760978
    Abstract: Missing region prediction techniques are described. In implementations, an image pair is obtained that includes first and second images. The first image is corrupted by removing a region of content, resulting in a corrupted image having a missing region. The corrupted image and the second image of the image pair are then used to generate a training-image pair. Then, based on a plurality of training-image pairs including the generated training-image pair, a model is trained using machine learning. The model can subsequently be used to predict pixel values of pixels within a subsequent missing region of a subsequent image that is not used as part of the training.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: September 12, 2017
    Assignee: Adobe Systems Incorporated
    Inventors: Xin Lu, Zhe Lin, Jen-Chan Jeff Chien
  • Patent number: 9743898
    Abstract: An image generating apparatus for image generation is provided. The image generating apparatus includes a movable detector for detecting nuclear radiation during a detection period and an evaluation system. The evaluation system includes an interface system for transmitting detector data to the evaluation system. The detector data include information about the detected radiation for image generation. The evaluation system further includes a data memory portion for storing the detector data. The evaluation system further includes a program memory portion with a program for repeatedly determining at least one quality value with respect to image generation during the detection period.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: August 29, 2017
    Assignee: Surgiceye GmbH
    Inventors: Thomas Wendler, Nassir Navab, Jörg Traub
  • Patent number: 9722495
    Abstract: System and method for regulating a power conversion system. An example system controller includes a signal processing component and a driving component. The signal processing component is configured to receive a feedback signal associated with an output signal of a power conversion system and generate a processed signal based on at least information associated with the feedback signal. The driving component is configured to generate a drive signal based on at least information associated with the processed signal and output the drive signal to a switch in order to affect a primary current flowing through a primary winding, the drive signal being associated with a demagnetization period corresponding to a demagnetization process of the power conversion system. The signal processing component is further configured to, sample and hold the feedback signal a plurality of times during the demagnetization period to generate a plurality of sampled and held signals.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: August 1, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Lieyi Fang
  • Patent number: 9699481
    Abstract: A technique is provided for processing decoded video data to mask visual compression artifacts resulting from video compression. In accordance with this technique, a hardware block is provided for generating and adding random noise to the decoded video stream. In one embodiment, a random number is generated for each pixel of the decoded video data and compared against one or more threshold values to determine a threshold range. In such an embodiment, a noise addend value is selected based upon the threshold comparison and summed with the current pixel. While the present technique may not eliminate the compression artifacts, the addition of random noise renders the compression artifacts less noticeable to the human eye and, therefore, more aesthetically pleasing to a viewer.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: July 4, 2017
    Assignee: APPLE INC.
    Inventors: Haitao Guo, Sally Fung, Timothy J. Millet
  • Patent number: 9681072
    Abstract: A solid-state image pickup device 1A includes an image pickup section 2 having a pixel array P in which a pixel C is two-dimensionally arranged, a lens section 3 having a plurality of lenses 3a arranged on the pixel array P, and an image generating section 4A for generating an image by using an electrical signal SE. The image pickup section 2 has a plurality of the pixel arrays P including one image pickup region T. The image generating section 4A generates the image by averaging the electrical signals SE for each pixel C corresponding to one another among the image pickup regions T, in order to reduce noise present in the electrical signal SE.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: June 13, 2017
    Assignee: NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERISTY
    Inventors: Keiichiro Kagawa, Shoji Kawahito
  • Patent number: 9613305
    Abstract: The invention is a printed material on which a two-dimensional code that can be read by a terminal and from which information for specifying contents reproduced by terminal can be acquired is displayed. Two-dimensional code displays a frame portion from which information about position and attitude of terminal can be acquired by terminal and a code portion configured by rotational state display dots 151, 152, 153, and 154 and 20 dots specifying contents to be reproduced by terminal. The 20 dots of the code portion and rotational state display dots are arranged on upper and lower dot portions sandwiching a dot nondisplay portion displaying a character, pictorial symbol, and the like. Rotational state display dots 151, 152, 153, and 154 show rotational position state of the terminal with respect to the two-dimensional code, and displays pattern information.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: April 4, 2017
    Assignees: TOKYO SHOSEKI CO., LTD., QONCEPT, INC.
    Inventors: Kenichi Nakano, Koju Uchida, Takashi Kojima, Tomoyuki Okamoto, Takeru Tohi, Kenichi Hayashi, Yuta Koshizawa
  • Patent number: 9569828
    Abstract: A method and apparatus for the imaging of a labeled biological sample. The method comprises illuminating the labeled biological sample, generating members of a time series of images if the labeled biological sample, generating a plurality of difference images between later members of the time series of images of earlier members of the time series of images and combining the plurality of difference images to generate a final image of the labeled biological sample.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: February 14, 2017
    Assignees: VIB VZW, Katholieke Universiteit Leuven, K.U.
    Inventors: Sebastian Munck, Wim Annaert, Patrik Verstreken
  • Patent number: 9501713
    Abstract: Compact descriptors of digital images are produced by detecting interest points representative of the digital images and selecting out of the interest points key points for producing e.g. local and global compact descriptors of the images. The digital images are decomposed into blocks by computing an energy (variance) for each said block and then subjecting the blocks to culling by rejecting those blocks having an energy failing to pass an energy threshold. The interest points are detected only in the blocks resulting from culling, and the key points for producing the compact descriptors are selected out of the interest points thus detected, possibly by using different selection thresholds for local and global compact descriptors, respectively. The number of key points for producing the compact descriptors may be varied e.g. by adaptively varying the number of the interest points detected in the blocks resulting from culling.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: November 22, 2016
    Assignee: STMicroelectronics S.r.l.
    Inventor: Danilo Pietro Pau
  • Patent number: 9430959
    Abstract: An anti-aliasing font character on a monitor is prevented from being erroneously judged as an image region. The pixel of interest and four pixels each preceding and following the pixel of interest (a total of nine pixels) are extracted (S3). The largest of the values of the sub-pixels of each of the nine pixels extracted is determined as the representative value of each pixel (step S5). The nine representative values are represented as a histogram and referred to as H0, H1, H2, and the like in the descending order of the frequency in the distribution (S7). Whether Formula (1) below is satisfied is determined (S9). H0+H1+H2<TH . . . (1) If Formula (1) is satisfied, the pixel of interest is judged as a non-character-region pixel; if not, the pixel of interest is judged as a character-region pixel (S11, S13).
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: August 30, 2016
    Assignee: EIZO Corporation
    Inventors: Haifeng Chen, Masashi Nakao
  • Patent number: 9424653
    Abstract: A computer implemented method for generating a representative thumbnail for an image. The method comprises determining a representative area of an image, the determining comprising determining an absence of faces in the image; dividing the image into one or more zones; and selecting a zone with maximum edge strength as the representative area; and generating a thumbnail by cropping the image to the representative area.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: August 23, 2016
    Assignee: ADOBE SYSTEMS INCORPORATED
    Inventors: Mohit Gupta, Durga Ganesh Grandhi
  • Patent number: 9384558
    Abstract: An image processing device of the present invention acquires the positional information of a boundary line for a case where a first image is segmented into a foreground and a background by a segmentation processing that segments an image into a foreground and a background, and controls the segmentation processing to segment a second image having a predetermined relationship with the first image by use of the positional information of the acquired boundary line.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: July 5, 2016
    Assignee: CASI COMPUTER CO., LTD.
    Inventor: Takashi Yahata
  • Patent number: 9129380
    Abstract: Long-term understanding of background modeling includes determining first and second dimension gradient model derivatives of image brightness data of an image pixel along respective dimensions of two-dimensional, single channel image brightness data of a static image scene. The determined gradients are averaged with previous determined gradients of the image pixels, and with gradients of neighboring pixels as a function of their respective distances to the image pixel, the averaging generating averaged pixel gradient models for each of a plurality of pixels of the video image data of the static image scene that each have mean values and weight values. Background models for the static image scene are constructed as a function of the averaged pixel gradients and weights, wherein the background model pixels are represented by averaged pixel gradient models having similar orientation and magnitude and weights meeting a threshold weight requirement.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: September 8, 2015
    Assignee: International Business Machines Corporation
    Inventors: Rogerio S. Feris, Yun Zhai
  • Patent number: 9031353
    Abstract: A method for reducing spatial noise of images includes the following steps. A target pixel is obtained and an operating block is built accordingly. Pixel values of the target pixel and multiple neighboring pixels in the operating block are operated to obtain a variance corresponding to the operating block. Whether the target pixel is characteristic is judged according to the variance. If the target pixel is not characteristic, the multiple pixels in the operating block are filtered to obtain a modulated pixel value. The pixel value of the target pixel is updated to the modulated pixel value.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: May 12, 2015
    Assignee: Novatek Microelectronics Corp.
    Inventor: Jian-Chao Wang
  • Patent number: 8989514
    Abstract: A method is provided that includes identifying a plurality of data sets, each data set is associated with a distribution model and each data set is associated with an image having a first noise level. The method includes partitioning the data sets into a plurality of groups and generating a best representative estimate for each group, the estimate is associated with a second noise level that is less than the first noise level. The method further includes annotating each group and receiving an input data set. The method includes assigning the input data set to a group and annotating the input data set according to that group's annotation.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: March 24, 2015
    Assignee: Voxeleron LLC
    Inventors: Daniel Russakoff, Jonathan Oakley
  • Patent number: 8982421
    Abstract: A threshold matrix generating method includes: generating q(x, y, g) in which the number of dots in an initial dot pattern is varied; calculating an error matrix (ERR(x, y, g)) of q(x, y, g); calculating AVE(a, b) representing the uniformity of the number of dots in discrete blocks into which the dot pattern has been divided; determining two pixels, of which the dot positions are to be swapped, on the basis of ERR (x, y, g) and AVE(a, b); swapping the dot positions; calculating the evaluation value (MSE(n)) of q(x, y, g) after the positional swapping; and repeating the positional switch of the dots repeating the generation of q(x, y, g) and the positional swapping of the dots with q(x, y, g) functioning as the initial dot pattern until a q(x, y, g) satisfying MSN(n)<MSN(n?1) is obtained.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: March 17, 2015
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Toshiyuki Mizutani, Kenichirou Hiramoto
  • Patent number: 8983222
    Abstract: A computer-implemented method for automatically retrieving information regarding optical properties of a scattering medium including receiving a first digital image and a first image quality value associated with the first digital image and sharpness of an edge of the first digital image, producing an optimized image, transforming the optimized image into an optimized optical transfer function, receiving a second digital image and a second image quality value associated with the second digital image and sharpness of an edge of the second digital image, identifying either the first or second digital image as an optimized digital image, and transforming the optimized optical transfer function into an optimized value of the optical parameter.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: March 17, 2015
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Weilin Hou, Alan Weidemann
  • Patent number: 8976257
    Abstract: An automatic process for calibrating the optical image exposure value to compensate for changes in machine vision systems to maintain optimal exposure of captured images and adjust for the different characteristics among cameras components, such as imaging sensor sensitivity, LED strength, external lighting, reflective functions of any background material, different external lighting conditions, possible changes or updates of the systems over the years, such as LED changes, and even the aging of camera sensor and LEDs over time. A series of images of a target are captured with a predetermined sequence of exposure values, the saturation exposure percentage of a region of interest is calculated in each of the images, and the saturation exposure percentages are compared to determine the exposure value that has a saturation exposure percentage that varies the least from the saturation exposure value of the preceding and following exposure values.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 10, 2015
    Assignee: Jadak, LLC
    Inventors: Mo Chen, Chun Jia
  • Patent number: 8971659
    Abstract: Systems and methods of bad pixel cluster detection are disclosed. In a particular embodiment, a system is disclosed that includes a bad pixel correction module coupled to receive image data and adapted to perform a bad pixel cluster detection process. The bad pixel correction module includes logic to determine whether two test pixels have values that exceed a representative value of a group of surrounding pixels by more than a threshold amount. The threshold amount is determined via a table lookup.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: March 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Babak Forutanpour
  • Patent number: 8885208
    Abstract: The present disclosure includes systems and techniques relating to processing of high resolution images, such as digital painting on high resolution images. In general, one aspect of the subject matter described in this specification can be embodied in a method that includes receiving input defining a modification to a target image; determining, at a first processor, a low resolution proxy result of the modification applied to the target image; determining, at a second processor, a higher resolution result of the modification applied to the target image; displaying the low resolution proxy result before completion of the determining at the second processor; and updating the displayed low resolution proxy result with the higher resolution result. Other embodiments of this aspect include corresponding systems, apparatus, and computer program products.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: November 11, 2014
    Assignee: Adobe Systems Incorporated
    Inventor: Jerry G. Harris
  • Patent number: 8885967
    Abstract: A method and apparatus are provided for adaptive sharpness enhancement of image data. In on embodiment, a method for sharpness enhancement includes receiving image data for a first frame, performing linear sharpening enhancement of the image data, performing non-linear sharpening enhancement of the image data, and generating blending parameters based on the image data. The blending parameters may be generated based upon image data of the first frame, linear sharpened image data for the first frame, and non-linear sharpened image data for the first frame. The method may further include blending the image data of the first frame, the linear sharpened image data, and the non-linear sharpened image data based upon the blending parameters.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: November 11, 2014
    Assignee: CSR Technology Inc.
    Inventor: Oscar Ayzenberg
  • Patent number: 8860750
    Abstract: Devices and methods for dynamic dithering are provided. For example, an electronic device according to an embodiment may include image processing circuitry that operates on higher-bit-depth image data and a display panel that displays lower-bit-depth image data. To obtain the lower-bit-depth image data, the image processing circuitry may perform dynamic dithering on the higher-bit-depth image data. Such dynamic dithering may involve dithering frames of the higher-bit-depth image data based at least in part on respective rounding threshold values.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: October 14, 2014
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Michael Frank
  • Patent number: 8805082
    Abstract: An image processing apparatus has an image analyzer including a feature detector, a feature combiner, and a resolution discrimination signal generator. For each pixel in a prescribed area of an input image, the feature detector outputs a representative difference value obtained from the pixel values of pixels positioned, with reference to that pixel, at prescribed intervals. The feature combiner outputs a combined feature value obtained from the representative difference values obtained for each pixel in the described area. The resolution discrimination signal generator outputs a resolution discrimination signal obtained from the combined feature value. The resolution discrimination signal has a monotonic non-decreasing relationship to the combined feature value. The resolution discrimination signal indicates an extent to which the input image includes signal components with frequencies equal to or greater than a particular frequency determined by the prescribed intervals.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shotaro Moriya, Hideki Yoshii
  • Patent number: 8798371
    Abstract: The number of pixels in an identified pixel region is counted, a feature point of the pixel region is extracted and the number of the feature points is counted when the number of the pixels counted has been determined to be equal to or higher than a first threshold value, whether the counted number of the feature points is equal to or lower than a second threshold value is determined, features is calculated based on the feature point extracted from the pixel region when the number of the feature points has been determined to be above the second threshold value, and the first threshold value is changed when the number of the feature points has been determined to be equal to or lower than the second threshold value. Image similarity determination process can be stably performed without any degradation in determination accuracy.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: August 5, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroki Yoshino
  • Patent number: 8768090
    Abstract: An image adjustment method includes the steps of: a) configuring a weight-value generator to receive first image data and specified data and to generate an adaptive weight value according to the first image data and the specified data; and b) configuring an image blender to receive the first image data and second image data, and to generate adjusted image data by blending the first image data and the second image data with reference to the adaptive weight value. The adaptive weight value has a magnitude that corresponds to a difference between the first image data and the specified data.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: July 1, 2014
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chia-Wei Yu, Chun-Hsing Hsieh
  • Patent number: 8761536
    Abstract: An image processing apparatus includes a thinning processing unit which performs thinning processing on image data and a smoothing processing unit which performs smoothing processing on the image data. The image processing apparatus further includes an edge direction determination unit which determines an edge direction with respect to each pixel of the image data, a blending processing unit which decides a pixel value of a target pixel of when the smoothing processing and the thinning processing are realized at the same time, and a thinning adjustment unit which determines whether a thinned pixel becomes isolated, and the thinning adjustment unit resets the change amount in pixel value due to the thinning processing of the thinned pixel to a value of zero, if the thinned pixel is determined to be isolated.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: June 24, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Koji Washio
  • Patent number: 8750611
    Abstract: Techniques are provided for an image processing device to receive image data from a remotely positioned sensor. Spectral bands within the image data are equalized. High and low resolution images are obtained from the equalized image and are used to ultimately generate a color separation space. The color separation space is used to determine balance positions or spatial locations on the axes of the color separation space. The balance positions are converted to a red-green-blue (RGB) triplet that is used to calculate band or channel balance gains. The channel balance gains are then applied to an original image obtained from the image data.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: June 10, 2014
    Assignee: Exelis Inc.
    Inventors: Michael A. Vaughn, Erin P. K. Fredericks, Stacey E. Casella, Blake P. Jabieski
  • Patent number: 8743234
    Abstract: A technique of approximating exponential transformations such as gamma correction is disclosed that achieves high resolution without requiring relatively large RAMs for lookup tables or specialized DSP processors. The technique includes the acts of scaling the pixel values according to their values, wherein smaller pixel values are scaled with larger scale factors and larger pixel values are scaled with smaller scale factors; quantizing the scaled pixel values; looking up the quantized pixel values in a lookup table to provide lookup values; and scaling the lookup values responsive to their scale factors to provide the gamma-corrected pixel values.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: June 3, 2014
    Assignee: Flir Systems, Inc.
    Inventor: Barry Walker
  • Publication number: 20140133777
    Abstract: Disclosed is a threshold setting apparatus including a creating unit which creates a plurality of images of tones by performing a tone conversion process on an original image including a subject by using a plurality of temporary thresholds which are different from each other, a subject detection unit which detects the subject in each of the plurality of images of tones which are created by the creating unit, an evaluation value calculating unit which calculates evaluation values relating to likeness to the subject from the plurality of subjects detected by the subject detection unit and associates the evaluation values with the temporary thresholds, and a setting unit which sets a threshold suited for the tone conversion of the original image based on the plurality of evaluation values calculated by the evaluation value calculating unit.
    Type: Application
    Filed: October 10, 2013
    Publication date: May 15, 2014
    Applicant: CASIO COMPUTER CO., LTD.
    Inventors: Shigeru KAFUKU, Keisuke SHIMADA
  • Patent number: 8682095
    Abstract: A method for recognizing markers printed on a learning material, includes sampling an image of the learning material; grouping the sampled image of pixels into a first image group and a second image group based on a threshold; and calculating medians of the first image group and the second image group to update the threshold with a first average value of the calculated medians. Further, the method for recognizing markers printed on the learning material includes repeating the above until a difference between a previous threshold and an updated threshold is equal to or smaller than a reference value; binarizing an image captured by a camera based on the updated threshold; and detecting the markers based on the binary image.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: March 25, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Su Woong Lee, Junsuk Lee, Yong Hun Kim, Seokjae Lee, Sangwon Um, Shihua Ming
  • Publication number: 20140050418
    Abstract: An imaging system includes an analog-to-digital converter configured to convert an analog pixel value into a first digital pixel value. The imaging system also includes an index value source configured to receive the first digital pixel value from the analog-to-digital converter and to generate a digital index value based on a comparison of the first digital pixel value to a digital reference value. In addition, the imaging system includes a transmitter in communication with the index value source and configured to transmit the digital index value. Further, the imaging system includes an image processing component configured to receive the digital index value and to generate a second digital pixel value based at least in part on the received digital index value and a lookup table of the image processing component.
    Type: Application
    Filed: August 17, 2012
    Publication date: February 20, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: James Zhengshe Liu, Richard Larry Anderton, Brian James Grekowicz, Bela Janos Kiraly
  • Patent number: 8639055
    Abstract: A method for calculating an image quality metric for evaluating the quality of a digital image including the steps of denoising the data of the image, identifying edges in the denoised data, determining an edge profile of the edges, determining a grayscale angle for each identified edge in the edge profile that is associated with the edge, and calculating the image quality metric based on a weighted average of the grayscale angles for all the edges.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: January 28, 2014
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Weilin Hou, Alan D. Weidemann
  • Patent number: 8630019
    Abstract: An image processing apparatus which makes it possible to prevent a third party from outputting secret information as an image without leaving any evidence. A printer section of the image processing apparatus receives first image data and attribute data. The printer section forms an image corresponding to the first image data on a sheet, and then forms an image of information of the attribute data on the sheet in a manner superimposed on the image. A controller of the image processing apparatus generates second image data from the attribute data, and performs control such that the first image data and the second image data are recorded as history information on a job processed by the image processing apparatus.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: January 14, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takaya Tsujii
  • Patent number: 8630505
    Abstract: Image processing devices include a color extractor circuit configured to extract color information from input image data, a color shifter circuit configured to color shift the input image data according to the extracted color information and a definition enhancement circuit configured to detect a color difference from the color-shifted image data and to unsharp mask filter the color-shifted image data according to the detected color difference.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: January 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Taehoon Kim
  • Patent number: 8600158
    Abstract: A method and system operative to process color image data are disclosed. In one embodiment, the method can comprise the steps of receiving color image data, determining the color ranges to be applied to the color image data, assigning each of the pixel positions in the image data a color range, assigning a different spatial binary pattern to each color range, and assigning each of the pixel positions a binary output pixel value that corresponds to the spatial binary pattern assigned to the color range assigned to that pixel position. The resulting binary image data can be written to a file for subsequent storage, transmission, processing, or retrieval and rendering. In other embodiments, a system can be made operative to accomplish the same.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: December 3, 2013
    Assignee: Hand Held Products, Inc.
    Inventors: Jingquan Li, Stephen Patrick Deloge
  • Patent number: 8594446
    Abstract: A method for enhancing a digitized image of a document containing text or graphics. The digitized image is decomposed into a low-frequency pedestal image and a high-frequency residual image. A first gain factor image is determined by applying a first tonescale function to the residual image, and a second gain factor image is determined by applying a second tonescale function to the residual image pixel values, wherein parameters defining the tonescale functions are determined by analyzing the pedestal and residual images. An enhanced document image is formed by combining a scaled pedestal image determined by multiplying the pedestal image by the first gain factor image, and a scaled residual image determined by multiplying the residual image by the second gain factor image.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: November 26, 2013
    Assignee: Eastman Kodak Company
    Inventor: Efrain Orlando Morales
  • Patent number: 8594456
    Abstract: An image denoising method according to the present invention includes the steps of: sequentially selecting a pixel in an image as a current pixel; dynamically determining a current search block and a strength parameter; transferring the comparison block of each pixel in the current search block to a frequency domain; determining a current frequency basis; obtaining a similarity between each neighborhood pixel and the current pixel in the current search block according to the current frequency basis; determining a weighting of each neighborhood pixel related to the current pixel according to the strength parameter, and a distance and the current pixel in the current search block; and weighted averaging each neighborhood pixel and the current pixel in the current search block according to the weighting so as to obtain a reconstruction value of the current pixel.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: November 26, 2013
    Assignee: Pixart Imaging Inc
    Inventors: Shu Sian Yang, Chuan Hsin Lee, Wen Han Yao
  • Patent number: 8576447
    Abstract: Error diffusion halftoning includes using a quantizer having an input and an output; and using a system having a bandpass characteristic to modify the quantizer input without feeding the quantizer output directly into the quantizer input. The error diffusion halftoning can produce clustered pixel halftone patterns that can be reliably reproduced by laser printers and other electro-photographic devices.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: November 5, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Niranjan Damera-Venkata
  • Patent number: 8576456
    Abstract: Systems and methods of ensuring the erasure of transient documents are disclosed. The systems and methods include an imaging device that sends a transient document with a pre-printed image into an erase cycle to attempt to remove the image from the document. After the erase cycle, a scanner scans the transient document and converts the transient document into a digital image. A processor compares bit depths of individual bits of the digital image to a bit depth threshold. Depending on the comparison and a number of completed erase cycles, the transient document enters an additional erase cycle, completes as sufficiently erased, or is rejected as not sufficiently erased.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: November 5, 2013
    Assignee: Xerox Corporation
    Inventor: Bryan J. Roof
  • Patent number: 8577183
    Abstract: A method samples a first spectral band to obtain an initial image frame, determines at least one region of interest of the scene from the initial image frame, each of the at least one region of interest associated with a mean signal level, illuminates the at least one region of interest with at least one illuminator when the mean signal level of the at least one region of interest is at or below a respective threshold of a first plurality of thresholds, the at least one region of interest being illuminated in accordance with a power threshold indicating a minimum illuminator power and agility necessary to illuminate the at least one region of interest, collects at least one image frame in at least one sub-band of a second spectral band, and generates at least one image to be displayed from at least the at least one image frame.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: November 5, 2013
    Assignee: Raytheon Company
    Inventor: Ian S. Robinson
  • Publication number: 20130286246
    Abstract: An image processing apparatus includes a calculation unit configured to calculate a first gain for adjusting brightness of a first image and a second image based on the first image captured at a first exposure amount and the second image captured at a second exposure amount, a division unit configured to divide the first gain into a second gain which changes according to a position in an image and a third gain which does not change according to a position in an image, a first gain correction unit configured to perform gain correction on the second image with the second gain, and a second gain correction unit configured to perform gain correction on the second image with the third gain.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Masaaki Matsuoka
  • Patent number: 8571329
    Abstract: A method and system for automatically analyzing and searching a database of digital content items includes a process for analyzing digital content items to identify portions capable of receiving text. In one implementation user input is received, where the user input helps construct a set of ordered values representing digital content item features desired by the user. The constructed set of ordered values is compared to sets of ordered values corresponding to digital content items in the database of digital content items, and digital content items are retrieved with sets of ordered values corresponding to the constructed set of ordered values.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: October 29, 2013
    Assignee: Getty Images, Inc.
    Inventor: Kelly Thompson
  • Patent number: 8571271
    Abstract: A dual-phase approach to red eye correction may prevent overly aggressive or overly conservative red eye reduction. The dual-phase approach may include detecting an eye portion in a digital image. Once the eye portion is detected, the dual-phase approach may include the performance of a strong red eye correction for the eye portion when the eye portion includes a strong red eye. Otherwise, the dual-phase approach may include the performance of a weak red eye correction for the eye portion when the eye portion includes a weak red eye. The weak red eye may be distinguished from the strong red eye based a redness threshold that shows the weak red eye as having less redness hue than the strong red eye.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: October 29, 2013
    Assignee: Microsoft Corporation
    Inventors: Lu Yuan, Fang Wen, Jian Sun
  • Patent number: 8571346
    Abstract: In a method of image signal processing, defective pixels are determined on-the-fly in a digital image representation based on a comparison of a pixel under evaluation with its surrounding pixels, with reference to a known resolving capability of a lens-sensor arrangement that captured the digital image representation. In response to the determination of defective pixels, the defective pixels are corrected.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: October 29, 2013
    Assignee: Nvidia Corporation
    Inventor: Shang-Hung Lin
  • Patent number: 8571307
    Abstract: A method and system operative to process monochrome image data are disclosed. In one embodiment, the method can comprise the steps of receiving monochrome image data, segmenting the input pixel values into pixel value ranges, assigning pixel positions in the lowest pixel value range an output pixel value of a first binary value, assigning pixel positions in the highest pixel value range an output pixel value of a second binary value, wherein the first and second binary values are different, and assigning pixel positions in intermediate pixel value ranges output pixel values that correspond to a spatial binary pattern. The resulting binary image data can be written to a file for subsequent storage, transmission, processing, or retrieval and rendering. In further embodiments, a system can be made operative to accomplish the same.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: October 29, 2013
    Assignee: Hand Held Products, Inc.
    Inventors: Jingquan Li, Robert M. Hussey, Justin Hnatow, Stephen Patrick Deloge
  • Patent number: 8571354
    Abstract: A method of reducing the spatial resolution of images is disclosed. At least one embodiment of the method includes: —acquiring an input image including image parts having a spatial resolution larger than SR pixels/meter; —acquiring a depth map associated with the input image; —determining for each pixel p(x,y) a spatial resolution value by means of the depth map; —processing a region of pixels of the input image for which holds that the spatial resolution value is larger than a predefined threshold corresponding to SR pixels/meter to obtain a corresponding region of pixels having a spatial resolution smaller then or equal to SR pixels/meter in an output image. The method enables to removes privacy information from images by reducing the spatial resolution to a level that the privacy information cannot be recognized in the image anymore.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: October 29, 2013
    Assignee: Tomtom Global Content B.V.
    Inventors: Krzysztof Miksa, Marcin Michal Kmiecik
  • Patent number: 8565549
    Abstract: A contrast enhancement method for an image includes extracting at least one sub-band image from the image, comprising detail information at a predetermined spatial scale; determining a first gain value for each pixel, based on pixel values of the image or the at least one sub-band image; determining a second gain value for each pixel; modifying the first gain value for each pixel using the respective second gain value; and generating an enhanced image by applying the modified first gain values to respective pixels of one or more sub-band images and combining the result with the image. Determining the first gain value for each pixel comprises: estimating a dynamic range of the pixel values in a neighbourhood of that pixel; and setting the first gain value in inverse relation to the dynamic range.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: October 22, 2013
    Assignee: NXP B.V.
    Inventor: Andre Leitao
  • Patent number: 8559082
    Abstract: An image processing apparatus includes an integer-part converting unit configured to convert multi-level image data into integer image data by referring to a first conversion table, a threshold setting unit configured to generate matrix data for performing area coverage modulation by referring to the multi-level image data, a decimal-part converting unit configured to convert the multi-level image data into decimal image data by referring to a second conversion table, a level reducing unit configured to reduce levels of the decimal image data by using a threshold generated in the threshold setting unit, an adding unit configured to add the integer image data to the level-reduced decimal image data and outputting a result of addition as gamma conversion image data, and an image processing unit configured to perform image processing on the gamma conversion image data.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: October 15, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Takeshi Ogawa
  • Patent number: RE46976
    Abstract: An object plane is set, and appropriate image processing is performed according to the setting of the object plane. An image processing apparatus has a controller (7). The controller (7) receives image data for a captured image and distance information on the distance to a designated point in the captured image, sets an object plane (100) containing the designated point, converts the distance information to the information on the distance from the object plane, and performs predetermined image processing according to the converted distance information.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: July 31, 2018
    Assignee: Sony Corporation
    Inventor: Tatsuo Makii