Dither Or Halftone Patents (Class 345/596)
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Patent number: 8537176Abstract: A method and apparatus capable of reducing or preventing dithering noises in 3D dither for displaying stereoscopic or 3D images are provided. The method entails generating image data in which two consecutive frames have the same dithered image data.Type: GrantFiled: September 28, 2010Date of Patent: September 17, 2013Assignee: Samsung Display Co., Ltd.Inventors: Hyun-Seok Ko, Seung-Hwan Moon, Jung-Hwan Cho, Myeong-Su Kim
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Patent number: 8508556Abstract: An image display method including following steps is provided. A backlight of a display panel is adaptively adjusted according to a backlight adjustment factor related to the intensity value of an external light and the brightness of an original image. Brightness factors of the original image are corrected according to the adjustment of the backlight, and the original image is reset by using the corrected brightness factors and original color factors. Thereby, the problem of image distortion caused by backlight adjustment can be reduced.Type: GrantFiled: April 20, 2010Date of Patent: August 13, 2013Assignee: Wintek CorporationInventors: Ching-Fu Hsu, Chih-Chang Lai, Shiao-Hui Liao, Ting-Yu Chang
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Publication number: 20130201205Abstract: An approach is provided for storing data via a processor. Reference data corresponding to an odd row of a look-up table (LUT) is stored in a first plurality of memories via the processor based on one or more grayscale values associated with a current frame and one or more grayscale values associated with a previous frame. Reference data corresponding to an even row of the LUT is stored in a second plurality of memories via the processor based on the one or more grayscale values associated with the current frame and the one or more grayscale values associated with the previous frame.Type: ApplicationFiled: October 19, 2012Publication date: August 8, 2013Applicant: Samsung Display Co., LtdInventor: Samsung Display Co. Ltd
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Patent number: 8494303Abstract: An image processing apparatus for automatically improving the contrast of an input image that is obtained from a digital camera or the like, and obtaining a sharper and clearing image. A contrast improvement unit performs a contrast improvement process on the input image by comparing an object pixel in the input image with pixels in the surrounding area. An image combination unit combines the enhanced image obtained by the contrast improvement process with the input image. The combined image is then output to a desired device such as a printer by an image output unit.Type: GrantFiled: December 9, 2011Date of Patent: July 23, 2013Assignee: Panasonic CorporationInventors: Tatsumi Watanabe, Akio Kojima, Yasuhiro Kuwahara, Yusuke Monobe, Toshiharu Kurosawa, Hirotaka Oku
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Patent number: 8488039Abstract: A digital image processing apparatus capable of displaying a color distribution chart and a method of operating the same is provided. The digital image processing apparatus includes a digital signal processing unit which detects digital color signals from an image input via an image photographing unit and calculates a color distribution chart that indicates a proportion of the detected color signals in the image. The apparatus and method can calculate and display a color distribution chart of a displayed image and change colors of the image into optimized colors.Type: GrantFiled: September 11, 2008Date of Patent: July 16, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Eun-young Kim
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Patent number: 8478066Abstract: An image-correction method is realized, in which, by utilizing a table having small storage area, high-accuracy shading correction can be implemented, that does not undergo deterioration of performance, even when shading properties dynamically change.Type: GrantFiled: October 31, 2003Date of Patent: July 2, 2013Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takeo Fujita, Narihiro Matoba
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Patent number: 8471864Abstract: An image processor includes a first dither data memory storing a first dither matrix, a second dither data memory storing a second dither matrix, a selecting unit selecting one of the first dither matrix and the second dither matrix, and a converting unit converting multi-value image data to binary data by comparing density of the multi-value image data to the threshold value set in corresponding element of the one of the first dither matrix and the second dither matrix selected by the selecting unit. The second dither matrix is configured of a plurality of sub-dither matrices. Each sub-dither matrix has a plurality of elements each assigned with a threshold value in a range from a maximum threshold value to a minimum threshold value. A set of threshold values from the minimum threshold value to a predetermined intermediate threshold value is assigned to elements in corresponding locations of each of the plurality of sub-dither matrices.Type: GrantFiled: March 19, 2008Date of Patent: June 25, 2013Assignee: Brother Kogyo Kabushiki KaishaInventor: Koki Aonuma
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Publication number: 20130141455Abstract: An image dithering module is provided. The image dithering module includes a plurality of data processing channels. The data processing channels respectively process image data of each pixel or sub-pixel in an image frame. Each of the data processing channels includes a bit processing unit and a bit truncator unit. The bit processing unit mixes first pixel data with random data to generate second pixel data. The bit truncator unit truncates partial bits of the second pixel data to generate third pixel data.Type: ApplicationFiled: April 17, 2012Publication date: June 6, 2013Applicant: NOVATEK MICROELECTRONICS CORP.Inventor: Jian-Chao Wang
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Publication number: 20130135338Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for displaying high resolution images using examples of a halftoning method based on diffusing quantization error from a subpixel displaying a color to one or more subpixels that display a different color.Type: ApplicationFiled: November 30, 2011Publication date: May 30, 2013Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Jennifer L. Gille, Manu Parmar, Umamahesh Srinivas
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Patent number: 8451289Abstract: Embodiments of the present invention comprise systems and methods for creation, modification and implementation of dither pattern structures. The dither pattern structures may be at least one of spatially interrelated, chromatically interrelated, or temporally interrelated using feedback.Type: GrantFiled: July 31, 2012Date of Patent: May 28, 2013Assignee: Sharp Laboratories of America, Inc.Inventors: Xiao-Fan Feng, Scott J. Daly
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Patent number: 8451298Abstract: Displays, and methods of displaying images with the displays, which have quantized display characteristics for each of the pixels are disclosed. The displays and methods relate to both spatially and temporally dithering images so that the effective resolution of the display is higher than the result of the native spatial and intensity resolutions of the display, defined by pixel size, pitch, and number of quantization levels of each of the pixels.Type: GrantFiled: May 15, 2008Date of Patent: May 28, 2013Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Louis D. Silverstein, Alan Lewis, Jennifer L. Gille
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Patent number: 8451288Abstract: The present invention relates to an image signal processing apparatus capable of reproducing the appearance of an image that is displayed on a PDP. In an image processing unit 1, as a process for an image signal so that an image obtained when the image signal is displayed on a display apparatus of a display type other than that of a PDP can look like an image displayed on a PDP display apparatus, at least one of reproducing color shift caused by a moving image which is produced because lighting of RGB is turned on in this order, reproducing a dither pattern to be applied in a space direction, reproducing a dither pattern to be applied in a time direction, reproducing a space between pixel pitches, and reproducing a stripe array is performed. The present invention can be applied to a case where, for example, an image that can look like an image displayed on a PDP is to be displayed on an LCD.Type: GrantFiled: December 18, 2007Date of Patent: May 28, 2013Assignee: Sony CorporationInventors: Tetsujiro Kondo, Tomohiro Yasuoka
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Patent number: 8452122Abstract: An image processing apparatus includes: an assumed deteriorated image pixel value computing unit configured to calculate a pixel value of an assumed deteriorated image, wherein deterioration of a target image configured of multiple channels is assumed, for each of the channels as an assumed deteriorated image pixel value; a pseudo target image pixel value computing unit configured to calculate, regarding a pixel of interest that is a pixel of the target image corresponding to the assumed deteriorated image, a pixel value estimated for each of the channels as a pseudo target image pixel value for each of the channels based on the pixel values of the pixel of interest, and pixels adjacent thereto; and a restored image creating unit configured to create a restored image restored from the target image based on the calculated assumed deteriorated image pixel value and the calculated pseudo target image pixel value.Type: GrantFiled: August 21, 2009Date of Patent: May 28, 2013Assignee: Sony CorporartionInventors: Yasunobu Hitomi, Tomoo Mitsunaga
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Patent number: 8437046Abstract: This presents an image processing apparatus and an image processing method which print and output image data subjected to halftone processing with an appropriate density characteristic. The image processing apparatus generates a halftone image from a multi-value image using a threshold value arrangement, and generates a difference image between the generated halftone image and a second halftone image having the density characteristic different from that of the generated halftone image. The image processing apparatus stores the generated halftone image and the generated difference image.Type: GrantFiled: September 8, 2009Date of Patent: May 7, 2013Assignee: Canon Kabushiki KaishaInventor: Masahito Yamazaki
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MARKER IDENTIFICATION DURING GAMMA OR POSITRON IMAGING WITH APPLICATION TO INTERVENTIONAL PROCEDURES
Publication number: 20130096421Abstract: A method is provided for identifying a marker by co-registering gamma or positron images.Type: ApplicationFiled: October 12, 2011Publication date: April 18, 2013Inventor: Benjamin Lawrence WELCH -
Patent number: 8416256Abstract: In a liquid crystal display (LCD) driver circuit, harmonizing a pixel inversion pattern and a dither pattern is disclosed. The pixel inversion pattern and the cooperating dither pattern interact with each other in such a way that there is substantially no discernable video artifacts generated. The cooperating dither pattern can be selected from a plurality of dither patterns using a programmable dither block.Type: GrantFiled: June 25, 2009Date of Patent: April 9, 2013Assignee: STMicroelectronics, Inc.Inventors: Greg Neal, Dinesh Shedge
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Patent number: 8411105Abstract: A method and system for computing pixel parameters is disclosed. In one embodiment, the rasterizing of a geometric primitive comprising a plurality of vertices wherein each vertex comprises a respective color value, is performed by a rasterization module of a graphics pipeline. The rasterizing includes interpolating a respective color value for each pixel of the geometric primitive, wherein the respective color value is of a first bit width. The rasterizing also includes transforming the respective color value to a second bit width to produce a respective transformed color value for each pixel. Additionally, the rasterizing includes altering the respective transformed color value using a screen-location based dither table to produce a dithered transformed color value for each pixel. After the rasterizing, propagating the respective dithered transformed color value of each pixel to downstream modules of the graphics pipeline is performed.Type: GrantFiled: May 14, 2004Date of Patent: April 2, 2013Assignee: Nvidia CorporationInventor: Edward A. Hutchins
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Patent number: 8411992Abstract: An image processing device includes: an estimated plane calculation portion calculating, for inputted image data, estimated planes defined by luminance values in blocks each containing a predetermined number of pixels including a reference pixel; an optimal estimated plane selection portion selecting an optimal estimated plane having a least summation of errors between luminance values of respective pixels in a block and an estimated plane among the estimated planes; a weighting factor calculation portion calculating a weighting factor for the reference pixel base on luminance values of the reference pixel and in the optimal estimated plane; and a weighted smoothing portion computing a sum of products of relative luminance differences between the luminance values of the respective pixels in the block and in the optimal estimated plane and the weighting factor for the reference pixel and adding a luminance value in the optimal estimated plane at a reference pixel position to a result of computation.Type: GrantFiled: December 16, 2009Date of Patent: April 2, 2013Assignee: Sony CorporationInventors: Takehiro Hamada, Nobuhiro Tsunashima
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Patent number: 8411987Abstract: A method of enhancing a contrast and an apparatus for enhancing a contrast are provided. The method of enhancing the contrast includes: dividing an image into a plurality of blocks and calculating an average luminance value of each block; interpolating a peripheral luminance value for each input pixel of the image by using the average luminance value; and enhancing the contrast of the input pixel by using the interpolated peripheral luminance value of the input pixel and a unique luminance value of the input pixel.Type: GrantFiled: January 3, 2008Date of Patent: April 2, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Young Ran Han, Seung Sin Lee, Du-Sik Park
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Patent number: 8406563Abstract: A photometric calibration method includes: obtaining a target image and a reference image by a light field camera and transforming the reference image into a revised target image corresponding to the target image; calculating a photometric calibration ratio according to a function for correlating the target image and the revised target image by using a numerical algorithm; and the intensity of the target image is divided by the photometric calibration ratio to obtain a calibrated target image. A light field of a scene is formed by all of the calibrated target image so as to improve the quality of the light field.Type: GrantFiled: July 28, 2009Date of Patent: March 26, 2013Assignee: National Taiwan UniversityInventors: Chia-Kai Liang, Homer H. Chen, Bing-Yi Wong, Gene Liu
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Publication number: 20130069974Abstract: This disclosure provides techniques related to halftoning video images for display on an electronic device. The techniques include adaptively selecting, on a pixel-by-pixel basis, between a mask-based dithering (MBD) and an error diffusion (ED) halftoning technique. The ED technique may be selected for halftoning pixels of an input frame of data having either a temporal change rate metric (CRM) or a spatial CRM exceeding a respective threshold. Where both the temporal CRM and spatial CRM are less than the respective thresholds, halftoning may be performed by the technique that produces a halftone value closer to a comparison halftone value of a comparison frame. The comparison frame may be a preceding frame, or an immediately preceding frame.Type: ApplicationFiled: May 24, 2012Publication date: March 21, 2013Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Jeho Lee, Manu Parmar, Jennifer Lee Gille
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Publication number: 20130069968Abstract: This disclosure provides methods, apparatus, and computer programs encoded on computer storage media for tone based halftoning of digital images. By exploiting knowledge of local image features and tone levels, the halftoning method may be adaptively switched between error-diffusion and mask-based dithering with reduced boundary artifacts. By further utilizing a smart quantization error clipping scheme, artifacts inherent to the method of error diffusion are also reduced. The method consistently generates higher quality halftone images for both still and video applications when compared to conventional methods.Type: ApplicationFiled: March 16, 2012Publication date: March 21, 2013Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Jeho Lee, Manu Parmar, Jennifer Lee Gille
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Patent number: 8400464Abstract: A liquid crystal display including a pixel array, multiple control lines and a driving unit is provided. The pixel array has multiple pixels. The control lines are coupled to the pixels. The driving unit drives the pixel array via the control lines. Of the pixels coupled to the same control line, the number of image-dithering compensated pixels with positive polarity is equal to the number of image-dithering compensated pixels with negative polarity when the pixel array is driven.Type: GrantFiled: January 15, 2010Date of Patent: March 19, 2013Assignee: Novatek Microelectronics Corp.Inventors: Tsung-Hsien Tsai, Shu-Wei Chang, Chun-Mu Yan
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Patent number: 8400463Abstract: A data processing module for generating dithered data includes a data transforming unit and a dithering unit, wherein the data transforming unit is utilized to transform input data into transformed data containing predetermined data, and the dithering unit is utilized to perform a dithering process on the transformed data to generate the dithered data. By making the display picture of the dithered data contain a fixed pattern corresponding to the predetermined data, the influence on the display picture caused by noise existing in the input data can be efficiently reduced.Type: GrantFiled: October 1, 2008Date of Patent: March 19, 2013Assignee: MStar Semiconductor, Inc.Inventor: Shih-Chung Wang
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Patent number: 8390647Abstract: An image processing system and method for comparing and correcting two monochromic images A2 and B2 that extracts a skeleton of objects in the monochromic image A2 to generate a skeleton image A3 and extracts a skeleton of objects in the monochromic image B2 to generate a skeleton image B3. The system and method then covers the skeleton image A3 with the monochromic image B2 to generate a covered image A4, and covers the skeleton image B3 with the monochromic image A2 to generate a covered image B4. The system and method further corrects allowable variances in the covered images A4 and B4, and outputs the covered images whose variances have been corrected.Type: GrantFiled: September 22, 2009Date of Patent: March 5, 2013Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Chung-I Lee, Chien-Fa Yeh, Wei-Qing Xiao
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Patent number: 8390638Abstract: One embodiment of the invention includes an image compensation module, an OLED display panel, and an OLED display apparatus. A target current value corresponding to a target gray level is stored in a compensation memory portion. A reference gray level and a reference current value corresponding to the reference gray level are stored in a reference memory portion. A compensation gray level can be obtained by an arithmetic compensation unit according to the target current value, reference gray level, reference current value, and gamma parameter. This may reduce the memory space needed for the compensation and reference memory portions, and compensate the images of the display apparatus and panel so that precise colors can be displayed with a high image quality.Type: GrantFiled: November 11, 2009Date of Patent: March 5, 2013Assignee: Innolux CorporationInventors: Yu-Wen Chiou, Ming Chun Tseng, Hong-Ru Guo, Chun-Yu Chen
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Publication number: 20130050248Abstract: A color display method in which display is realized by controlling, on the basis of image data having three primary colors, a reflective color display element in which three display panels are stacked, the color display method includes: converting the image data having the three primary colors into color space image data; classifying an image into one of a plurality of categories on the basis of criteria relating to brightness, hues, and chroma of the image; correcting the brightness of the color space image data in accordance with correction characteristics of the corresponding category; correcting the chroma of the color space image data whose brightness has been corrected; and converting the color space image data whose chroma has been corrected into image data having the three primary colors.Type: ApplicationFiled: June 28, 2012Publication date: February 28, 2013Applicant: FUJITSU LIMITEDInventor: Masaki NOSE
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Patent number: 8384959Abstract: In a matrix area, a plurality of linear areas each of which extends in a tilt direction tilted relatively to row and column directions are arranged in a direction perpendicular to the tilt direction without spaces, and the plurality of linear areas are alternatively assigned to first and second element groups along an arrangement direction. One element is specified in each element group, and subsequently a process of specifying an element farthest from the specified elements is repeated, to acquire a turn-on order of dots with increase in gray level in one grayscale range and a turn-off order of dots with decrease in gray level in the remaining grayscale range, and a threshold value of each element is determined according to these orders. Thus, generated is a threshold matrix capable of reducing graininess in a halftone image with directionality in the tilt direction, and improving the reproduction of thin lines and characters.Type: GrantFiled: August 10, 2012Date of Patent: February 26, 2013Assignee: Dainippon Screen Mfg. Co., Ltd.Inventor: Hiroshi Asai
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Patent number: 8379038Abstract: A color-processing method includes: selecting a target color gamut to produce an input color signal; calculating a mixture ratio enabling primary colors of the target color gamut to be created by mixing primary colors of a color gamut of the color reproduction apparatus to reproduce the input color signal therewith; producing primary colors reconfigured by mixing the primary colors of the color gamut of the color reproduction apparatus according to the calculated mixture ratio; adjusting an illuminant to match an output signal to a color gamut determined by the reconfigured primary colors; and converting the input color signal to match to the primary colors determined by the reconfigured primary colors. Further a user can arbitrarily set a color gamut in a range that a color reproduction apparatus can reproduce regardless of an input color signal without a quantization errors.Type: GrantFiled: March 13, 2006Date of Patent: February 19, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Yoon-cheol Shin, Dong-bum Choi
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Publication number: 20130038892Abstract: An image processing device analyzes a drawing command read from a memory and performs a halftone processing function to image data. In the image processing device, a drawing command analysis unit analyzes a drawing command, a full set of drawing commands is registered in a drawing command table, and an error processing command is stored in an error processing command storing unit. When the drawing command analysis unit detects a command error indicating that a drawing command read from the memory is not registered in the drawing command table, an error processing executing unit executes the error processing command stored in the error processing command storing unit and performs an error processing function.Type: ApplicationFiled: August 9, 2012Publication date: February 14, 2013Applicant: RICOH COMPANY, LTD.Inventor: Naoya MORITA
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Patent number: 8355176Abstract: Disclosed herein is an image processing apparatus including: a screen processor for determining each pixel value of a screen processing application unit region composed of a plurality of pixels to which a threshold matrix is applied, in an inputted image; and for carrying out a screen processing by applying one threshold matrix among a plurality of threshold matrices in which applied positions of the threshold values are different from each other, to the plurality of pixels in the screen processing application unit region based on each determined pixel value.Type: GrantFiled: January 29, 2007Date of Patent: January 15, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventor: Kosuke Toura
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Publication number: 20130002703Abstract: A dither unit with a programmable kernel matrix in which each indexed location/entry may store one or more dither values. Each dither value in a respective entry of the kernel matrix may correspond to the number of bits that are truncated during dithering. During dithering of each pixel of an image, entries in the kernel matrix may be indexed according to the relative coordinates of the pixel within the image. A dither value for the pixel may be selected from the indexed entry based on the truncated least significant bits of the pixel component value. When the kernel matrix is storing more than one dither value per entry, the dither value may be selected based further on the number of truncated least significant bits. A dithered pixel component value may then be generated according to the dither value and the remaining most significant bits of the pixel component value.Type: ApplicationFiled: September 21, 2011Publication date: January 3, 2013Inventors: Brijesh Tripathi, Craig M. Okruhlica, Wolfgang Roethig
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Publication number: 20130002704Abstract: A liquid crystal display device includes: a first substrate, on which a reference potential trunk line that supplies a reference potential to a plurality of sub-pixels and a switching element of each of the plurality of sub-pixels, are disposed; and a second substrate, on which a display signal line that supplies a display signal, is disposed. A liquid crystal capacitance of each of the plurality of sub-pixels is formed between the first substrate and the second substrate. Pixels composed of the plurality of sub-pixels that correspond to a plurality of luminance regions are arranged in a matrix. In case that a prescribed half-tone is displayed in between pixels that are adjacent in the row direction, the plurality of sub-pixels that correspond to the same luminance region are arranged adjacently in the row direction.Type: ApplicationFiled: March 25, 2011Publication date: January 3, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Tsuyoshi Kamada, Tetsuya Ide, Seiji Ohhashi, Shohei Katsuta
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Patent number: 8330770Abstract: A system and method for processing video data are disclosed. In one aspect, a method includes generating halftone data for a first video frame and generating halftone data for a second video frame. The method further includes, to reduce at least one visual artifact, selectively copying the halftone data for the first video frame into the halftone data for the second video frame, the selectively copying being based upon a comparison between an adaptive threshold and the change resulting due to the copying of the data, in the human visual system model-based perceptual error of the halftone data for the second video frame.Type: GrantFiled: June 4, 2010Date of Patent: December 11, 2012Assignee: Qualcomm MEMS Technologies, Inc.Inventor: Hamood-Ur Rehman
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Publication number: 20120293540Abstract: Embodiments of the present invention comprise systems and methods for creation, modification and implementation of dither pattern structures.Type: ApplicationFiled: July 31, 2012Publication date: November 22, 2012Applicant: SHARP LABORATORIES OF AMERICA, INC.Inventors: Xiao-Fan FENG, Scott J. DALY
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Publication number: 20120286173Abstract: A method and system for exposing a target according to pattern data in a maskless lithography machine generating a plurality of exposure beamlets for exposing the target. The method comprises providing input pattern data in a vector format, rendering and quantizing the input pattern data to generate intermediate pattern data, and re-sampling and re-quantizing the intermediate pattern data to generate output pattern data. The output pattern data is supplied to the lithography machine, and the beamlets generated by the lithography machine are modulated on the basis of the output pattern data.Type: ApplicationFiled: November 10, 2011Publication date: November 15, 2012Applicant: MAPPER LITHOGRAPHY IP B.V.Inventors: Teunis VAN DE PEUT, Marco Jan-Jaco WIELAND
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Publication number: 20120281011Abstract: One embodiment of the invention is a method of displaying text in a text editor that can include: displaying a text input region within a background; receiving a keystroke for a first alphanumeric character of a first text line; displaying the first text line in a focus format of a first contrast with the background; receiving a keystroke for a second alphanumeric character of a second text line; displaying the second text line in the focus format; shifting the first text line to a shadow format of a second contrast with the background less than the first contrast when the second text line is displayed in the focus format; and shifting the first text line to the focus format and the second text line to the shadow format when a text input caret shifts from the second text line to the first text line.Type: ApplicationFiled: March 7, 2012Publication date: November 8, 2012Inventor: Oliver Reichenstein
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Patent number: 8305394Abstract: A system and method for processing video data are disclosed. In one aspect, a method includes generating halftone data for a first video frame and generating halftone data for a second video frame. The method further includes, to reduce at least one visual artifact, selectively copying the halftone data for the first video frame into the halftone data for the second video frame, the selective copying being based upon a comparison between a predetermined fixed threshold and the difference in the human visual system model-based perceptual error of the originally generated halftone data for the second video frame and the human visual system model-based perceptual error of the halftone data for the second video frame after the copying is done.Type: GrantFiled: June 4, 2010Date of Patent: November 6, 2012Assignee: Qualcomm MEMS Technologies, Inc.Inventors: Hamood-Ur Rehman, Marc Mignard, Clarence Chui
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Patent number: 8299817Abstract: Vertical dithering is performed for vertical droop compensation in image processing using Linear Feedback Shift Registers (LFSRs). Line memories are not used. A compensation circuit includes a signature reload input signal coupled to the input of five LFSRs. Each LFSR includes a signature store. The output of each LFSR provides a sequence output signal that is gated with a corresponding enable signal in a first logic circuit. The output of all of the first logic circuits are combined in a second logic circuit to provide a control signal output.Type: GrantFiled: November 30, 2010Date of Patent: October 30, 2012Assignee: STMicroelectronics Asia Pacific Pte Ltd.Inventors: Beng-Heng Goh, Srijith Varma Vijaya Varma
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Publication number: 20120268478Abstract: A dithering method and associated apparatus is provided. The method synthesizes a dither pattern including a plurality of elements. At least two of the plurality of elements are of a same value, and at least two of the elements of the same value respectively associate with different driving polarities to prevent flickering. While sub-pixel data of a sub-pixel corresponds between two predetermined color levels of the sub-pixel, a color level displayed by the sub-pixel is determined from the two predetermined color levels according to a sum of the sub-pixel data and the element corresponding to the sub-pixel.Type: ApplicationFiled: April 23, 2012Publication date: October 25, 2012Applicant: MStar Semiconductor, Inc.Inventor: Kuo-Hsiang Hung
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Publication number: 20120268479Abstract: This disclosure provides systems, methods and apparatus including computer programs encoded on computer storage media for producing line multiplied images with better visual appearance. In one aspect, before lines of the image are multiplied, they are dithered with a noise signal that increases faster with higher frequency along the multiplied dimension of the image data than along the non multiplied dimension of the image. This results in a line multiplied image was improved image quality.Type: ApplicationFiled: October 21, 2011Publication date: October 25, 2012Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Manu Parmar, Jennifer Lee Gille, Alan Lewis
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Patent number: 8291013Abstract: A communication apparatus including: a communicating portion communicable with a server device storing feed information including content informations; a feed-information obtaining portion which obtains the feed information; a display portion which displays informations; a storage portion which stores informations; an updated-date-and-time extracting portion which extracts, from the feed information, an updated date and time indicating a date and time at which information constituted by at least part of the feed information has been updated; an updated-date-and-time storing portion which stores, into the storage portion, the updated date and time and the information constituted by at least part of the feed information in association with each other; and a display controller which displays at least part of the content information(s) corresponding to the information constituted by at least part of the feed information associated by the updated-date-and-time storing portion in order of the updated date and timeType: GrantFiled: March 5, 2010Date of Patent: October 16, 2012Assignee: Brother Kogyo Kabushiki KaishaInventor: Tomohiro Ito
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Publication number: 20120249573Abstract: An image processing apparatus includes an image receiving unit, a screen-information receiving unit, a pixel-block extraction unit, a halftone-dot extraction unit, and a halftone-dot adding unit. The image receiving unit receives an image. The screen-information receiving unit receives screen information concerning screening which has been performed on the received image. The pixel-block extraction unit extracts pixel blocks which are possibly halftone dots included in the received image. The halftone-dot extraction unit extracts, on the basis of the screen information, a pixel block which is a halftone dot among the pixel blocks extracted by the pixel-block extraction unit. The halftone-dot adding unit adds, on the basis of the screen information, a halftone dot at a position at which no pixel block has been extracted by the pixel-block extraction unit.Type: ApplicationFiled: October 4, 2011Publication date: October 4, 2012Applicant: FUJI XEROX CO., LTD.Inventor: Natsumi MIYAZAWA
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Patent number: 8274531Abstract: A display apparatus adapted to generate image data for controlling a first light modulation section adapted to project a first window, and image data for controlling a second light modulation section adapted to project a second window smaller than the first window and projected so as to overlap with the first window, includes: a first image conversion section adapted to convert a resolution of input image data in accordance a resolution of the first light modulation section to form the image data for controlling the first light modulation section; and a second image conversion section adapted to extract data included in a range corresponding to a resolution of the second light modulation section among the input image data to form the image data for controlling the second light modulation section.Type: GrantFiled: September 30, 2009Date of Patent: September 25, 2012Assignee: Seiko Epson CorporationInventor: Kunio Yoneno
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Publication number: 20120236021Abstract: Systems, methods and apparatus including computer programs encoded on computer storage media optimize display image quality under a variety of imaging environments. Dynamic frame streams such as those present in video applications may require a higher frame rate to adequately convey motion in the stream. A line multiplying image pipeline may be utilized for dynamic frames, which lowers the resolution of the displayed image. When dithering line multiplied images, a noise signal including asymmetrical high frequency components around zero frequency may be utilized. The display of static frames, such as photographs, may be achieved with acceptable image quality using a relatively lower display frame rate. Such a frame rate may enable the display of a high resolution image. A noise signal tailored for higher resolution, non line multiplied frames, such as a noise signal with symmetric high frequency components around zero frequency may be utilized for static frames.Type: ApplicationFiled: October 21, 2011Publication date: September 20, 2012Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Manu Parmar, Jennifer Lee Gille, Alan Lewis
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Publication number: 20120229497Abstract: 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: ApplicationFiled: March 8, 2011Publication date: September 13, 2012Applicant: APPLE INC.Inventors: Brijesh Tripathi, Michael Frank
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Patent number: 8253756Abstract: A circuit dithers pixel data on a display, and includes a lookup table module, a dithering parameter decoder, a first adder, a second adder, and an overflow handling module. A lookup table of the lookup table module stores dithering parameters generated by encoding odd and even pixel dithering parameters. The dithering parameter decoder generates second and third dithering parameters corresponding to odd and even pixels from a first dithering parameter. The first adder generates a dithered odd pixel parameter according to the odd pixel parameter and the second dithering parameter. The second adder generates a dithered even pixel parameter according to the even pixel parameter and the third dithering parameter. The overflow handling module checks for overflow, and generates an output odd pixel parameter according to the dithered odd pixel parameter, and generates an output even pixel parameter according to the dithered even pixel parameter.Type: GrantFiled: November 12, 2009Date of Patent: August 28, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Yu-Ju Lee, Tzu-Chiang Shen
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Patent number: 8248662Abstract: An image forming apparatus and a method of using the same, the image forming apparatus including: a detection unit to detect an edge of an input image; a categorization unit to categorize the detected edge, according to a gray value and line width; and a compensation unit to compensate the gray value according to the categorized edge type.Type: GrantFiled: November 20, 2007Date of Patent: August 21, 2012Assignee: Samsung Electronics Co., Ltd.Inventor: Hyeon-seok Seo
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Patent number: 8243093Abstract: Aspects of the present invention relate to creation, modification and implementation of dither pattern structures applied to an image to diminish contouring artifacts. Some aspects relate to dither pattern structures with pixel values in a first color channel pattern that are spatially dispersed from pixel values in a corresponding pattern in a second color channel. Some aspects relate to application. Some aspects relate to systems and apparatus for creation and application of these dither pattern structures comprising pixel values dispersed across color channels.Type: GrantFiled: August 22, 2003Date of Patent: August 14, 2012Assignee: Sharp Laboratories of America, Inc.Inventors: Xiao-Fan Feng, Scott J. Daly
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Patent number: RE44241Abstract: A method and apparatus is described for producing a translucent image over a base image created on the display screen of a computer system by a selected first application program, and conducting image operations either on the base image created by the selected application program with reference to the translucent image produced, or conducting image operations on the translucent image with reference to the base image of the first application program. The first application program runs on a central processing unit (CPU) of a computer system to produce a base image, and another application program referred to as the overlay program is run to produce the translucent image such that portions of the base image which are overlapped by the overlay image are at least partially visible through the translucent image. There is also a mechanism for blending the first video data and the second video data to produce a blended image on the screen assembly.Type: GrantFiled: May 7, 2009Date of Patent: May 28, 2013Assignee: Apple Inc.Inventors: Michael L. Gough, Joseph J. MacDougald, Gina D. Venolia, Thomas S. Gilley, Greg M. Robbins, Daniel J. Hansen, Jr., Abhay Oswal