Recursive Filter Patents (Class 382/265)
  • Patent number: 9191593
    Abstract: There is provided an image signal processing apparatus, comprising a demosaic processing unit receiving input of mosaic image data of each of signals obtained by a single plate imaging device having an element array composed of visible light obtaining elements obtaining visible light signals, and invisible light obtaining elements obtaining signals including invisible light components, and generating a demosaic image of each of the obtained signals; and a noise reduction processing unit receiving input of the demosaic image to execute correction of pixel values of the demosaic image obtained by the visible light obtaining elements on the basis of edge information extracted from the demosaic image of the signals obtained by the invisible light obtaining elements.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: November 17, 2015
    Assignee: SONY CORPORATION
    Inventor: Hajime Hosaka
  • Patent number: 9117136
    Abstract: An image processing method and an image processing apparatus for removing noise from an image are disclosed. A provided image processing method includes: dividing an input image into a luminance signal and a chrominance signal; removing noise from the luminance signal; restoring luminance signal present in the noise removed from the luminance signal; removing noise from the chrominance signal; and combining the luminance signal and the chrominance signal from which the noises are removed. Accordingly, an image of which an edge component is well preserved and a degree of color noise is low is generated not only in a general environment but also in a low light level and high sensitivity environment having a large amount of noise.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: August 25, 2015
    Assignees: Samsung Electronics Co., Ltd., Industry-University Cooperation Foundation Sogang University
    Inventors: Soon-geun Jang, Rae-hong Park, Young-il Pyo
  • Patent number: 9002134
    Abstract: An image may be processed to normalize and/or remove noise from the image. The processing of the image may involve decomposition of the image into multiple components and subsequent gray scale registration across multiple scales.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: April 7, 2015
    Assignee: Riverain Medical Group, LLC
    Inventors: Jason F. Knapp, Steve W. Worrell
  • Patent number: 8983223
    Abstract: A method includes implementing, through a processor communicatively coupled to a memory and/or a hardware block, a Bilateral Filter (BF) including a spatial filter component and a range filter component, and implementing the spatial filter component with a low-complexity function to allow for focus on the range filter component. The method also includes determining, through the processor, filter tap value(s) related to the range filter component as a function of radiometric distance between a pixel of a video frame and/or an image and other pixels thereof based on a pre-computed corpus of data related to execution of an application in accordance with a filtering requirement of the pixel by the application. Further, the method includes constraining, through the processor, the filter tap value(s) to a form i×base based on the BF implementation. i is an integer and base is a floating point base.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: March 17, 2015
    Assignee: NVIDIA Corporation
    Inventors: Niranjan Avadhanam, Prashant Sohani
  • Patent number: 8983224
    Abstract: A program is implemented on a processor for executing the following steps: receiving images of a scene comprising successive frames from a camera, each frame including an array of pixels; filtering intensities of the array of pixels in a respective frame by using a Bessel Filter to compute a constant value for the respective frame; and summing a predetermined number of respective frames from the camera to determine rapid motion in the scene. The filter includes a Bessel filter, which is an n-pole recursive digital filter, where n is a positive integer.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: March 17, 2015
    Assignee: Exelis, Inc.
    Inventor: Grant Matthews
  • Patent number: 8908989
    Abstract: Methods and composition for denoising digital camera images are provided herein. The method is based on directly measuring the local statistical structure of natural images in a large training set that has been corrupted with noise mimicking digital camera noise. The measured statistics are conditional means of the ground truth pixel value given a local context of input pixels. Each conditional mean is the Bayes optimal (minimum mean squared error) estimate given the specific local context. The conditional means are measured and applied recursively (e.g., the second conditional mean is measured after denoising with the first conditional mean). Each local context vector consists of only three variables, and hence the conditional means can be measured directly without prior assumptions about the underlying probability distributions, and they can be stored in fixed lookup tables.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: December 9, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventors: Wilson S. Geisler, Jeffrey S. Perry
  • Patent number: 8878963
    Abstract: A method and an apparatus are provided for eliminating noise in a digital image. An ambient image and at least one flash image are captured in succession of a given location. At least one image alignment technique is applied for the ambient image and the at least one flash image. Joint mean shift filtering is applied to the at least one flash image to obtain filter weights. The filter weights are applied to the ambient image to eliminate noise in the ambient image.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: November 4, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Amit Bhalchandra Prabhudesai, Parijat Prakash Prabhudesai
  • Patent number: 8879841
    Abstract: In accordance with an embodiment of the invention, an anisotropic denoising method is provided that removes sensor noise from a digital image while retaining edges, lines, and details in the image. In one embodiment, the method removes noise from a pixel of interest based on the detected type of image environment in which the pixel is situated. If the pixel is situated in an edge/line image environment, then denoising of the pixel is increased such that relatively stronger denoising of the pixel occurs along the edge or line feature. If the pixel is situated in a detail image environment, then denoising of the pixel is decreased such that relatively less denoising of the pixel occurs so as to preserve the details in the image. In one embodiment, detection of the type of image environment is accomplished by performing simple arithmetic operations using only pixels in a 9 pixel by 9 pixel matrix of pixels in which the pixel of interest is situated.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: November 4, 2014
    Assignee: Fotonation Limited
    Inventors: Noy Cohen, Jeffrey Danowitz, Orly Liba
  • Patent number: 8805111
    Abstract: A system and method for generating a fused image is provided. The system comprises processing circuitry configured to receive a plurality of images, filter each received image using an edge preserving filter, compute a weight for each received image based on the corresponding filtered image and the received image and generate a fused image based on the weights of each received image. The system further comprises a memory device configured to store the fused image.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: August 12, 2014
    Assignee: Indian Institute of Technology Bombay
    Inventors: Subhasis Chaudhuri, Ketan Kotwal, Shanmuganathan Raman
  • Patent number: 8760719
    Abstract: Systems are provided for determining toner color having a processor that generates a fluorescent toner color image that when printed using a corresponding fluorescent toner will generate a diffuse fluorescent color light that reduces the extent to which noise induced variations in density in a noise evident portion of a toner print are observable. The processor further adjusts reflective toner color images used to form the toner print so that the reflective toner color images combine with the fluorescent color image to form a target color image.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: June 24, 2014
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Chung-Hui Kuo
  • Patent number: 8749692
    Abstract: An image processing apparatus includes a data storing portion configured to store coefficient data for reconstructing an optical transfer function of an image pickup optical system in accordance with a type of the image pickup optical system and an imaging condition, a tap number determining portion configured to determine a tap number of the optical transfer function that is reconstructed by using the coefficient data in accordance with a size of one pixel of an image pickup element, and a reconstruction portion configured to reconstruct the optical transfer function in accordance with Nyquist frequency of the image pickup element and the tap number in a frequency space.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: June 10, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Watanabe
  • Patent number: 8737758
    Abstract: An apparatus of reducing noise includes: an edge determining module determining whether each pixel of an image corresponds to an edge; a low pass filter module performing low pass filtering of the image in two directions and performing low pass filtering only for the pixel determined not to be the edge; a filter selecting module selecting a filter having a flexible size to be applied to a mask region for each of the images low pass filtered based on the average brightness of the entire region and the average brightness of the mask region having a predetermined size; a sigma filter module sigma filtering the mask region using the selected filter for each of the images low pass filtered; and an averaging module averaging the image sigma filtered in the two directions.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 27, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Gyu Won Kim, Ho Seop Jeong, In Taek Song, Kyoung Joong Min, Tae Hyeon Kwon
  • Patent number: 8699815
    Abstract: A set of pixels of a background element is identified according to a mask that defines a shape of a foreground element. A color value for a pixel of the foreground element is determined. The determining includes ascertaining a value of a measure of brightness of one or more pixels of a set of pixels of the background element and calculating the color value for the pixel of the foreground element based on the value of the measure of brightness and a value of an adjustable contrast variable. The calculating the color value for the pixel of the foreground element preserves in the foreground element a color component of the one or more pixels of the set of pixels of the background element and increases contrast with the value of the measure of brightness according to the value of the adjustable contrast variable.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: April 15, 2014
    Assignee: Adobe Systems Incorporated
    Inventors: John W. Worthington, Jerry G. Harris
  • Patent number: 8692909
    Abstract: It is an object to provide an image processing device capable of obtaining a high precise image while aberration asymmetry is corrected. An image processing device according to the present invention includes image obtaining means configured to obtain an input image, image restoration means configured to restore the input image using a generated or selected image restoration filter in accordance with a transfer function of an image pickup system used for forming the input image from an object image. The image restoration filter makes a difference between absolute values of transfer functions of two azimuthal directions at a time when the restoration image is obtained from an object smaller than a difference between absolute values of transfer functions of the two azimuthal directions of the image pickup system.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: April 8, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koshi Hatakeyama
  • Patent number: 8670624
    Abstract: Analysis filter processing is recursively repeated on horizontal and vertical low frequency component coefficients obtained as a result of the analysis filter processing, until a predetermined decomposition level is reached. Coefficients obtained during a process of computation in the analysis filter processing and, except for a preset decomposition level, horizontal and vertical low frequency component coefficients obtained as a result of the computation in the analysis filter processing are stored in a first storage section independently for each decomposition level. The coefficients stored in the first storage section are read as appropriate and the read coefficients are supplied for the analysis filter processing. The horizontal and vertical low frequency component coefficients of the preset decomposition level are stored in a second storage section. The coefficients stored in the second storage section are read as appropriate. The read coefficients are supplied for the analysis filter processing.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: March 11, 2014
    Assignee: Sony Corporation
    Inventors: Takahiro Fukuhara, Katsutoshi Ando
  • Patent number: 8655034
    Abstract: An information processing apparatus comprises: a spatial filtering unit configured to perform spatial filtering in a frequency range based on a spatial frequency of an object for image data of a current frame; and a recursive filtering unit configured to perform recursive filtering by obtaining image data, which has been processed prior to the current frame, from a memory, multiplying the obtained image data by a coefficient ? (?<1), adding the image data multiplied by the coefficient ? to the image data of the current frame after the spatial filtering, and storing the image data after the addition in the memory.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: February 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Noda
  • Patent number: 8639056
    Abstract: A method according to the invention enhances contrast of an image by accessing an original image, and establishing, assigning, or initializing pixel values and pixel coordinates of pixels of the image. Then, a Laplacian pyramid having an integral number of levels is generated for the image. A contrast boost pyramid is generated and applied to the Laplacian pyramid to obtain a modified Laplacian pyramid wherein values in the levels of the Laplacian pyramid are enhanced. An enhanced image is then constructed from the modified Laplacian pyramid.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: January 28, 2014
    Assignee: Thomson Licensing
    Inventors: Jiefu Zhai, Joan Llach
  • Patent number: 8620978
    Abstract: An acquired signal indicative of electrophysiological activity is filtered using both a wavelet filter and either a notch filter or a band-pass filter to eliminate noise or interference, such as power line interference. A wavelet transform is used to transform the acquired signal into the wavelet domain, where a wavelet filter is applied to extract a soft component (e.g., a component with small wavelet coefficients). A filter, such as a notch filter or a band-pass filter, is applied to the soft component in order to isolate an interference signal. The interference signal is used to produce an output signal representing the acquired signal filtered to eliminate the interference signal. For example, the interference signal may be subtracted from the acquired signal. Alternatively, the output signal may be reconstructed from respective hard and soft components of the acquired signal as transformed into the wavelet domain.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: December 31, 2013
    Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.
    Inventor: Lev A. Koyrakh
  • Patent number: 8594445
    Abstract: One embodiment of the present invention provides a system for applying a bilateral filter to an image. During operation, the system selects a first region within the image which is associated with a first pixel. Next, the system constructs a first histogram using pixel values within the first region. The system then computes a new value for the first pixel using the current value of the first pixel and the first histogram. The system then selects a second region within the image which is associated with a second pixel. Next, the system determines a non-overlapping region between the first region and the second region. The system then constructs a second histogram using the first histogram and pixel values in the non-overlapping region. Next, the system computes a new value for the second pixel using the current value of the second pixel and the second histogram.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: November 26, 2013
    Assignee: Adobe Systems Incorporated
    Inventor: Christopher B. Cox
  • Patent number: 8559749
    Abstract: A system for processing video data to improve image quality at low data rates comprising an encoder generating an entropy signal representing the relative entropy of the video data and a plurality of filters each receiving the entropy signal and a threshold setting and filtering the video data if the entropy signal is greater than the threshold setting.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: October 15, 2013
    Assignee: Streaming Appliances, LLC
    Inventor: Robert W. Reams
  • Patent number: 8538190
    Abstract: Provided are an image processing method and apparatus for effectively reducing noise in an image, and a recording medium storing a program for executing the method. The image processing apparatus includes a noise reduction unit configured to apply a noise reduction filter to first image data to obtain second image data; a first edge data obtaining unit configured to calculate edge data lost in the second image data compared with the first image data to obtain the first edge data; and a first synthesis unit configured to tune the first edge data and calculate third image data from the second image data and the tuned first edge data.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: September 17, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-pyo Gwak, Soon-geun Jang
  • Patent number: 8532170
    Abstract: A system is provided for processing video images for display. In one example, the system comprises a stream parser for retrieving a compressed main video data and a sub-picture identifier. A video decoder generates a main video image having a main video intensity value for each pixel in the main video. A sub-picture decoder determines a sub-picture image based on the sub-picture identifier. The sub-picture image includes a pixel data for each pixel in the sub-picture image indicative of a sub-picture pixel type including a background pixel type and a pattern pixel type. Each pixel includes a command code indicative of a background contrast level, a pattern contrast level, a background color level and a pattern color level. An intensity formatter generates a sub-picture pixel intensity for each pixel in the sub-picture image.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: September 10, 2013
    Assignee: Harman International Industries, Incorporated
    Inventors: Yong-Gab Park, John E. Crosbie, Shrikant Acharya
  • Patent number: 8532197
    Abstract: A method for detecting a temporally oscillating source in digital video signals includes: using an imaging device to capture a sequence of input images of a scene; generating digital video signals from the sequence of input images; and processing the digital video signals using a recursive Infinite Impulse Response (IIR) filter technique based on a differentiated version of Goertzel's Algorithm to detect a temporally oscillating source in the digital video signals. In various embodiments, the method also includes generating a visual display of the scene including one or more graphical elements at least one of which pertains to a detected temporally oscillating source.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: September 10, 2013
    Assignee: The Aerospace Corporation
    Inventors: Jonathan Joseph Lareau, Andrew James Gallagher
  • Patent number: 8520894
    Abstract: Disclosed herein are a method, system, and computer program product for aligning an input video frame from a video sequence with a background model associated with said video sequence. The background model includes a plurality of model blocks (820, 830), each one of the plurality of model blocks (820, 830) being associated with at least one mode (821, 822, 823, 831, 832, 833, 834), wherein each mode (821, 822, 823, 831, 832, 833, 834) includes a plurality of frequency domain attributes. The method selects, for each one of the plurality of model blocks, a reference mode dependent upon a mode of the corresponding model block, generates a background reference image (840) comprising the plurality of selected reference blocks (841, 842), and then aligns the input frame with the background model (810), based on the background reference image (810).
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: August 27, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Amit Kumar Gupta
  • Patent number: 8514304
    Abstract: An image processing device capable of obtaining a high precision image while aberration asymmetry is corrected. An image processing device includes image obtaining means configured to obtain an input image, image restoration means configured to restore the input image using a generated or selected image restoration filter in accordance with a transfer function of an image pickup system used for forming the input image from an object image. The image restoration filter makes a difference between absolute values of transfer functions of two azimuthal directions at a time when the restoration image is obtained from an object smaller than a difference between absolute values of transfer functions of the two azimuthal directions of the image pickup system.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 20, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koshi Hatakeyama
  • Publication number: 20130156332
    Abstract: A method is provided in one example embodiment that includes receiving a plurality of depth values corresponding to pixels of an image; and filtering the image as a function of a plurality of variations in the depth values between adjacent pixels of a window associated with the image. In more detailed embodiments, the method may include encoding the image into a bit stream for transmission over a network. The filtering can account for a bit rate associated with the encoding of the image.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Inventor: Dihong Tian
  • Patent number: 8457399
    Abstract: A histogram modeling based technique for image contrast enhancement. In some implementations, a histogram of an image is created and then transformed. Using the physics of sound or heat propagation, the technique may develop a spreaded histogram model that may be transformed. A nonlinear mapping may be created to remap an image for contrast enhancement. The technique may be performed without threshold tuning and may be implemented on a variety of display hardware.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: June 4, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Yingyong Qi
  • Patent number: 8457430
    Abstract: A region-based method for iterative regularization image enhancement, includes: for each region of a plurality of regions of an image, performing at least one gradient calculation of an objective function of a latest representative function of the region and updating the latest representative function according to the gradient calculation; and for the region of the plurality of regions of the image, when at least one predetermined convergence criterion is not satisfied, iteratively updating the latest representative function according to at least one gradient calculation of the same objective function of the latest representative function. In particular, the region-based method further includes: for the region of the plurality of regions of the image, when the predetermined convergence criterion is satisfied, performing postprocessing on the latest representative function of the region to generate an iteratively regularized partial image corresponding to the region.
    Type: Grant
    Filed: August 2, 2009
    Date of Patent: June 4, 2013
    Assignee: Mediatek Inc.
    Inventors: Yu-Pao Tsai, Yu-Wen Huang, Ying-Jui Chen, Shaw-Min Lei
  • Patent number: 8422814
    Abstract: Unnecessary flare correction at the boundary between a blanking area and video signal area is suppressed. An image quality improving apparatus includes 2-dimensional low-pass filter circuit 2 that extracts low-frequency components from an input video signal; subtractor circuit 4 that obtains high-frequency components by subtracting the low-frequency components extracted by 2-dimensional low-pass filter circuit 2 from the input video signal; and adder circuit 6 that adds the high-frequency components obtained by subtractor circuit 4 as a correction signal to the input video signal. The input video signal contains blanking signals without any video information. 2-dimensional low-pass filter circuit 2 starts extraction of the low-frequency components after a lapse of a predetermined unit time from when the input video signal changed from the blanking signal to the signal that contains the video information.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: April 16, 2013
    Assignee: NEC Display Solutions, Ltd.
    Inventor: Eifu Nezu
  • Patent number: 8416335
    Abstract: An image processing apparatus includes a data storing portion configured to store coefficient data for reconstructing an optical transfer function of an image pickup optical system in accordance with a type of the image pickup optical system and an imaging condition, a tap number determining portion configured to determine a tap number of the optical transfer function that is reconstructed by using the coefficient data in accordance with a size of one pixel of an image pickup element, and a reconstruction portion configured to reconstruct the optical transfer function in accordance with Nyquist frequency of the image pickup element and the tap number in a frequency space.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: April 9, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Watanabe
  • Patent number: 8416344
    Abstract: The invention relates to an iterative method for determining an interpolated video information value in an image that exhibits a number of image regions arrayed for example in matrix fashion, at least one of which is an image region to be interpolated, and that is disposed temporally between a first image and a second image of an image sequence.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: April 9, 2013
    Assignee: Entropic Communications, Inc.
    Inventor: Marko Hahn
  • Patent number: 8411104
    Abstract: The present invention provides an image processing device and an image display system achieving image quality improvement in moving picture by suppressing a motion blur in a hold-type display device, while maintaining low cost. The image processing device processes image data provided from outside and outputting the image data to a hold type display device. The image processing device includes a correction processing section performing a correction process to correct a pixel value in the image data for each pixel through performing a spatial HPF (high pass filter) process on the image data in a frame to be displayed in the display device according to a magnitude of a motion vector in the image data, the HPF process allowing an overshoot region and an undershoot region to be provided in a vicinity of both ends of the changing edge portion in the image data.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: April 2, 2013
    Assignee: Sony Corporation
    Inventors: Kenji Arashima, Tomoya Yano, Toru Nishi
  • Patent number: 8396318
    Abstract: An information processing apparatus includes: a first generating unit which generates, based on feature points detected on a cepstrum from an input image, a point-spread function that represents the degree of blurring generated in the input image; a second generating unit which generates a structure that represents an image obtained by reducing the input image with a size based on the point-spread function and enlarging this with the size, based on the point-spread function; and an updating unit which executes an updating process to update at least either the point-spread function or the structure such that the point-spread function and the structure approximate to a true value, with the updating unit repeatedly executing the updating process to set, of a structure component and a texture component making up the updated structure, the structure component as a new updated structure, and set the updated point-spread function as a new updated target.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: March 12, 2013
    Assignee: Sony Corporation
    Inventors: Shan Jiang, Ken Tamayama
  • Publication number: 20130051697
    Abstract: An image processing apparatus can perform time-sequential weighting addition processing on a moving image constituted by a plurality of frames includes a filter unit configured to obtain an image by performing recursive filter processing on a frame image that precedes a present target frame, which is one of the plurality of frames constituting the moving image, a coefficient acquisition unit configured to acquire a weighting coefficient for the present target frame based on a noise statistic of a differential image between an image of the present target frame and the image obtained by the filter unit, and an addition unit configured to perform addition processing on the moving image constituted by the plurality of frames based on weighting coefficients acquired by the coefficient acquisition unit.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 28, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Naoto Takahashi
  • Patent number: 8369644
    Abstract: The present invention relates to an apparatus for reducing motion blur in a video signal, comprising an analysing means for determining edge characteristics of an input video signal and for providing motion estimation of an edge within said input video signal, generation means for generating a synthetic detail signal dependent on said edge characteristics and said motion estimation, and an adding means for adding the detail signal to the edge within the input video signal and outputting an output video signal. The present invention further relates to a method for reducing motion blur in a video signal.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: February 5, 2013
    Assignee: Sony Corporation
    Inventors: Oliver Erdler, Piergiorgio Sartor, Carsten Dolar, Martin Richter
  • Patent number: 8340472
    Abstract: In a pixel interpolation apparatus for interpolating pixels, an edge pixel detection unit detects edge pixels constituting an edge among pixels on lines positioned above/below the interpolation pixel. A continuous edge detection unit detects edge pixels in which two pixels or more consecutively line up among edge pixels detected by the edge pixel detection unit as a continuous edge. A continuous edge pair detection unit determines the combination of the continuous edges detected on each of the lines above and below the interpolation pixel among the continuous edges detected by the continuous edge detection unit. An edge direction determination unit determines the edge direction of the interpolation pixel on the basis of the positional relation of one set of continuous edges determined by the continuous edge pair detection unit. An interpolation pixel calculation unit calculates an interpolation pixel using the edge direction determined by the edge direction determination unit.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 25, 2012
    Assignee: Fujitsu Limited
    Inventors: Kohji Yamada, Takashi Hamano, Mari Iwasaki
  • Patent number: 8340458
    Abstract: A system and method for smoothing digital images using a non-orthogonal convolution kernel involves steps for rearranging and remapping input image data and the convolution kernel image from hexagonal coordinate mapping to orthogonal mapping of a memory space thus enabling implementation of a general box filter convolution strategy to smooth the input image.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: December 25, 2012
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Joseph Y. Fang
  • Patent number: 8331723
    Abstract: Signal processing techniques are applied to digital image data to remove the distortion caused by motion of the camera, or the movement of the subject being photographed, or defective optics, or optical distortion from other sources. When the image is captured, the effect of relative motion between the camera and the subject is that it transforms the true image into a blurred image according to a 2-dimensional transfer function. The 2-dimensional transfer function representing the motion is derived using blind estimation techniques or by using information from sensors that detect the motion. The transfer function is inverted and used to define a corrective filter. The filter is applied to the image and the blur due to the motion is removed, restoring the correct image. Another embodiment uses the transfer function to avoid blur by combining multiple consecutive images taken at a fast shutter speed.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: December 11, 2012
    Inventor: Fatih M. Ozluturk
  • Patent number: 8306351
    Abstract: An apparatus and a method for filtering noise in an image signal are provided. The apparatus includes an analog-to-digital converter (ADC), a first filter, and a second filter. The ADC receives the image signal and converts the image signal into a digital signal. The first filter receives the digital signal and filters a first noise portion of the digital signal to generate a first signal. The second filter coupled to the first filter receives the first signal and filters a second noise portion of the first signal, wherein the first noise portion is a sampled-based impulse noise, and the second noise portion is a line-based impulse noise.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: November 6, 2012
    Assignee: Novatek Microelectronics Corp.
    Inventor: Hsin-I Lin
  • Patent number: 8300987
    Abstract: An upscaler is disclosed that upscales each of a maximum value map, a minimum value map and an average value map to a destination resolution. A blending module generates a detail-enhanced upscaled image of the source image having the destination resolution by blending corresponding pixel values from an upscaled image of the source image with at least one of: the upscaled maximum value map and the upscaled minimum value map. The blending may be based on the strength of detected edges in the source image and further based on a comparison of each pixel value in the upscaled image with a corresponding pixel value in an average value map. A source image characteristic calculator may generate the maximum value map, the minimum value map and the average value map based on the intensity values of a source image.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: October 30, 2012
    Assignee: ATI Technologies ULC
    Inventor: Jeff X. Wei
  • Patent number: 8300973
    Abstract: A method of pre-processing an image to identify processes for subsequent processing of the image, comprising the steps of: a) investigating portions of the image using a spatial filter; b) calculating for a first plurality of regions within a portion of the image under investigation respective metrics as a function of intensity within those regions; c) selecting combinations of regions within the portion of the image under investigation and processing them to obtain a second plurality of filter values, where the second plurality is greater than the first plurality; and d) comparing the filter values with process thresholds for subsequent processes so as to identify subsequent processes that can be skipped.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: October 30, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Darryl Greig
  • Patent number: 8301220
    Abstract: The invention relates to a medical system comprising a detection device for detecting an object in at least two dimensions by x-rays. The detection device is constructed to detect the object and to produce data comprising a 2D data record or a sequence of 2D data records over time representing the object in a projection through the object in two dimensions and to output the data. The medical system comprises at least one storage device with a data input actively connected to the detection device and which is constructed to receive the data at the input side and to write on a storage medium, in particular a portable storage medium, in such a way that the storage medium represents the data so it can be read out again. The medical system is constructed to digitally transmit the data from the detection device through to the storage device.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: October 30, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Juan Manuel Casso Basterrechea, Rainer Kaltschmidt
  • Patent number: 8295632
    Abstract: Systems, methods, and techniques are provided for performing any one or more of edge-preserving image sharpening, edge-preserving image smoothing, edge-preserving image dynamic range compression, and edge-aware data interpolation on digital images, wherein a pixel prediction module is adapted for coupling to a memory storing pixel data representative of a digital image and extracts from the image predicted pixel values using robust smoothing. The predicted pixels are stored in a memory and respective detail values equal to the difference between respective original and predicted values are computed. A pixel update module computes approximation values by averaging the respective detail values with original pixel values using robust smoothing, and stores the approximation values for subsequent rendering.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: October 23, 2012
    Assignee: Yissum Research Development Company of Jerusalem Ltd.
    Inventor: Raanan Fattal
  • Patent number: 8295631
    Abstract: A method for reducing noise in a color image captured using a digital image sensor having pixels being arranged in a rectangular minimal repeating unit. The method comprises, for a first color channel, determining noise reduced-pixel values using a first noise reducing process that includes computing weighted pixel differences by combining the pixel differences with corresponding local edge-responsive weighting values. The method further comprises a second noise reducing process that includes computing weighted chroma differences by combining chroma differences with corresponding local edge-responsive weighting values.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: October 23, 2012
    Assignee: Eastman Kodak Company
    Inventors: James E. Adams, Jr., Mrityunjay Kumar, Efrain O. Morales
  • Patent number: 8279932
    Abstract: An information processing apparatus includes: a synthesis filter unit configured to execute synthesis filtering for coefficient data of each subband, obtained by decoding a code stream of a reversibly-encoded image and performing band division, in each predetermined number of lines or in each predetermined block to obtain baseband image data on a line basis; a storage unit configured to store the baseband image data obtained by the synthesis filter unit; an analysis filter unit configured to read the baseband image data stored in the storage unit and execute analysis filtering for the image data to divide the image data up to a predetermined division level; and a control unit configured to control the analysis filter unit to execute analysis filtering as soon as the amount of the baseband image data stored in the storage unit reaches a data amount allowing analysis filtering.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: October 2, 2012
    Assignee: Sony Corporation
    Inventors: Takahiro Fukuhara, Katsutoshi Ando, Junya Araki
  • Patent number: 8279240
    Abstract: A video scaler is disclosed. A polyphase filter can be used to generate interpolated pixels. The values of pixels adjacent an interpolated pixel are examined to determine variation in values among the adjacent pixels to determine minimum and maximum value variations. The value of the interpolated pixel is limited based on the minimum and maximum value variations. Ringing artifacts can be reduced by limiting the color range of an interpolated pixel.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: October 2, 2012
    Assignee: Intel Corporation
    Inventor: Sreenath Kurupati
  • Patent number: 8265414
    Abstract: An image processing device to process a moving image, which is shot by a video shooting device, in increments of access units, includes: a correcting unit to correct the access unit to be processed by changing the properties of a low-pass filter which indicates imaging blur according to parameter values showing the properties of imaging blur which occurs at the time that the moving image is shot with the video shooting device, generating an inverse filter having inverse properties as to the low-pass filter, and performing processing to apply the inverse filters as to the access unit to be processed; wherein, with a frequency of which the frequency property of the low-pass filter indicating the imaging blur is zero being zero points, performing processing to apply the inverse filter is forbidden for predetermined frequency components of the frequency components of the access unit to be processed including the zero points.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: September 11, 2012
    Assignee: Sony Corporation
    Inventors: Toru Nishi, Kazuhiko Ueda, Mitsuyasu Asano
  • Patent number: 8249395
    Abstract: System, method, and computer program product to adaptively blend the interpolation results from an 8-tap Lanczos filter and the interpolation results from a bilinear filter, according to the local transitions of the input content. Artifacts may occur, which may be identified as such and corrected. Pixels that represent artifacts in the blended image may be replaced with the pixel for that location taken from the bilinear interpolation.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: August 21, 2012
    Assignee: Intel Corporation
    Inventors: Ya-Ti Peng, Yi-Jen Chiu
  • Patent number: 8244029
    Abstract: A computer-implemented method for generating depth-of-field effects includes receiving information specifying an input image rendered using a pinhole camera. A first set of circles of confusion associated with portions of the input image are determined based a set of parameters associated with the pinhole camera. The first set of circles of confusion are then associated with heat conductivity of a medium. The portions of the input image are blurred according to heat diffusion in the medium to generate a first output image having a first depth-of-field effect.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: August 14, 2012
    Assignee: Pixar
    Inventor: Michael Kass
  • Patent number: 8238685
    Abstract: An image noise reduction method is provided. An image is received. A first-stage process is performed to the image to obtain a luminance information Y and a color information Cb and/or Cr corresponding to a pixel array in an YCbCr domain. A second-stage process is performed to the luminance information Y to reduce at least a luminance noise. A third-stage process is performed to the color information Cb and/or Cr to reduce at least a color noise. The luminance information Y and the color information Cb and/or Cr are then combined.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: August 7, 2012
    Assignee: Novatek Microelectronics Corp.
    Inventor: Ming-Feng Chiang