Entries |
Document | Title | Date |
20080198173 | DRIVING OF A CHOLESTERIC LIQUID CRYSTAL DISPLAY APPARATUS - A cholesteric liquid crystal display apparatus is driven in accordance with image data having a predetermined number of possible grey levels. Drive signals are applied to the electrodes of the at least one cell which drive each pixel of the display apparatus into a state selected from a number of predetermined states in accordance with the image data. A number of predetermined states less than the predetermined number of possible grey levels of the image data is used but the image data is error diffusion dithered so that the spatial filtering performed by the eye of the viewer compensates for the low number of states used. By using such a low number of states, there are achieved several advantages in the design of the drive circuit which increase its simplicity and reduce cost. | 08-21-2008 |
20080252655 | TECHNIQUES FOR EFFICIENT DITHERING - A system comprising a storage including an image file associated with a plurality of pixels and processing logic coupled to the storage. The processing logic is adapted to determine an average of least significant bits associated with a maximum of two of the plurality of pixels, add the average to bits associated with a target pixel, and disassociate from the target pixel least significant bits of the target pixel. No pixels are disposed between the target pixel and each of the two of the plurality of pixels. | 10-16-2008 |
20090066719 | IMAGE DITHERING BASED ON FAREY FRACTIONS - A method for image processing includes quantizing pixel values of the first digital image to form a sequence of quantized pixel values each having the second bit depth. The step of quantizing the pixel values generates a sequence of least significant bit groups, each of the least significant bit groups including one or more least significant bits removed from an associated pixel value of the first digital image, The method also includes converting at least some of the least significant bit groups to binary values, the conversion of each least significant bit group using a binary representation of a fraction proportional to a value of the one or more least significant bits from the least significant bit group and adding the binary values to the quantized pixel values to produce the processed digital image. | 03-12-2009 |
20090073185 | DITHERING METHOD FOR AN LCD - A dithering method for an LCD is disclosed and comprises a plurality of steps. First, a plurality of long-bit gray-level signals are received. Each of the long-bit gray-level signal is transformed to a short-bit gray-level signal and at least one LSB is obtained based on the bit length difference between the long-bit gray-level signal and the short-bit gray-level signal. A sequence of frames is generated by the short-bit gray-level signals, and the frames can be classified into different groups according to the LSB. The offset pattern is applied on the frames, wherein the offset pattern is displayed at the same polarity in the same column of each frame in the same group. | 03-19-2009 |
20090085925 | DITHERING MASK AND METHOD OF FORMING THE SAME - A method of forming a dithering mask includes providing a specific sub-dithering mask, and generating a plurality of sub-dithering masks of the dithering mask by adjusting the specific sub-dithering mask. The dithering mask generated by the method includes a plurality of sub-dithering masks, each sub-dithering mask includes (4N)×(4N) dithering values, where N is an integer, and at least two sub-dithering masks of the plurality of sub-dithering masks have different contents. By breaking the regularity in the dithering mask, flickering patterns or visual patterns can be avoided on the screen, thereby raising the displaying quality of the screen. | 04-02-2009 |
20090147019 | Generating and merging two halftoned images - A method of producing a bit-map including rendering a bit-map of a first image using a first stochastic half-tone screen set, rendering a bit-map of a second image using a second stochastic half-tone screen set, wherein the first half-tone screen set and the second half-tone screen set have respectively associated stochastic half-tone screens, and wherein each half-tone screen of the second half-tone screen set is less than 100 percent correlated with, and not an inverse of, the associated half-tone screen of the first half-tone screen set; and merging the bit-map of the first image with the bit-map of the second image. | 06-11-2009 |
20090167781 | Information Processing Apparatus - An information processing apparatus capable of storing more data to a remaining region of a storage portion excluding a frame buffer region while displaying an image by an image display portion, is provided. When free space of a system storage portion has become below a predetermined value, a reduction in number of gray scales of the image results in a reduction in a data amount of image data stored in a display data storage region and a reduction in capacity of the display data storage region. This makes it possible to reduce the data amount of image data and increase the free space of the system storage portion while keeping the size of the image displayed by an image display portion. | 07-02-2009 |
20090251486 | IMAGE DISPLAY APPARATUS AND IMAGE ADJUSTING METHOD - An image display apparatus includes: an image signal processing unit which adjusts an input grayscale values included in an input image signal according to a predetermined grayscale characteristic; a display unit which displays an image based on an image signal included in an output grayscale value adjusted by the image signal processing unit; and a grayscale characteristic changing unit which changes a correlation between the input and output grayscale values defined based on the grayscale characteristic. | 10-08-2009 |
20090267962 | Flat panel display and method of driving the same - A flat panel display, which can save manufacturing costs and allow various types of dither masks to be applied, and a driving method thereof are disclosed. The flat panel display includes a look-up table (LUT) storing one dither mask, which is used to algorithmically generate additional dither masks. The dither masks are applied to image data to improve image quality. | 10-29-2009 |
20090284546 | INPUT GAMMA DITHERING SYSTEMS AND METHODS - Displays systems and methods for dithering input image data to reduce quantization errors in a display system are disclosed. One embodiment comprises inputting input image data to be rendered by said display system; applying a gamma table to said input image data to create a first intermediate image data; applying a dithering pattern, said dithering pattern comprising a checkerboard pattern, said checkerboard pattern depending upon the subpixel layout of the display. In other embodiments, the display system comprises a separate gamma table for each input color channel and applies these separate gamma table to perform white point adjustments for said display system. | 11-19-2009 |
20090303248 | System and method for dithering video data - A novel method for driving a display device includes the steps of receiving video data of a first type, converting the video data to data of a second type, dithering the data of the second type to form dithered pixel data, and outputting the dithered pixel data. The step of converting the video data to data of a second type includes inserting dither bits indicative of a particular dithering scheme into the data of the second type. An example display driver circuit includes an input for receiving video data, a data converter coupled to receive the video data and operative to convert the video data into pixel data to be written to pixels of a display, and a ditherer operative to receive the pixel data and to dither the pixel data to generate dithered pixel data. The video data is data of a first type, and the pixel data is data of a second type, different from the first type. In the disclosed example, the first type of data includes a binary data word, and the second type of data includes a compound data word. The compound data word includes a first set of binary weighted bits, a second set of arbitrarily weighted bits, and dither bits. | 12-10-2009 |
20100060660 | DITHERING METHOD AND APPARATUS - A dithering method prevents the gray level saturation in a gray level region having high luminance and expresses all gray levels. The dithering method includes performing the temporal/spatial compensation on input data, generating dithering data by adding a head bit to the data on which the temporal/spatial compensation is performed, and selecting a corresponding gamma voltage according to the dithering data. | 03-11-2010 |
20100079482 | Gradation conversion device, gradation conversion method, and program - A gradation conversion device that converts a gradation of an image, includes: dither means for dithering the image by adding random noise to pixel values forming the image; and one-dimensional ΔΣ modulation means for performing one-dimensional ΔΣ modulation on the dithered image. | 04-01-2010 |
20100149207 | GRAYSCALE CHARACTERISTIC FOR COLOR DISPLAY DEVICE - An original reference grayscale characteristic for a display panel is created by modifying the sRGB reference grayscale characteristic for the display panel. The changes selectively vary the relative luminances and contrasts of certain regions of the sRGB reference grayscale characteristic. The display device code values for the original reference grayscale characteristic comprise a substantially constant chromaticity corresponding to a particular CIE standard illuminant between D70 and D85 throughout the entire grayscale characteristic. A portion of the display device code values in the original reference grayscale characteristic are changed to provide a taper to a black chromaticity of the display panel in the lower portion of the grayscale characteristic. | 06-17-2010 |
20100177115 | METHOD AND SYSTEM OF CYCLICAL SCREEN ROTATION FOR NEAR UNITY SCALED PRINTER VIDEO DATA - A method for enabling near unity scaling of printer video data to provide compensation for paper shrinkage caused during duplex printing. To achieve high quality image output, near neighbor interpolation may be used at very high resolutions. However, the insertion of extra interpolated subpixels may cause an edge transition to be shifted away from its original subpixel location with respect to an applied anti-aliasing rendering screen thereby causing ragged edges. The method aligns the edge position and the anti-aliasing rendering screen by applying a cyclical rotation of the screen. | 07-15-2010 |
20100207958 | COLOR IMAGE CREATING APPARATUS - A color image creating apparatus includes an acquisition unit and a creation unit. The acquisition unit acquires a color visible image from an imaging unit which images the color visible image which includes plural pixels which each include color information and intensity information based on light in a visible light range. The creation unit uses the intensity information and the color information which are acquired by the imaging for a pixel which has intensity equal to or higher than a predetermined value so as to effect display in color, and uses the intensity information acquired by the imaging for a pixel which has intensity lower than the predetermined value so as to effect display in grayscale, and create a color image. | 08-19-2010 |
20100225663 | METHOD FOR CREATING GAMMA LOOK-UP TABLE AND DISPLAY DEVICE - A method for creating a Gamma look-up table (LUT) includes: calculating interpolated display characteristics of a plurality of colors by using a nonlinear interpolation algorithm based on a plurality of display characteristics of the predetermined patterns wherein the number of the display characteristics is smaller than the product of the number of the colors and the number of the interpolated display characteristics of the colors; and correcting the interpolated display characteristics of the colors on the basis of a maximum display characteristic value and a reference gamma value so that the Gamma look-up table is created. The predetermined patterns comprise a plurality of gray level patterns which one-by-one correspond to a plurality of levels, and the interval of a pair of adjacent gray level patterns among the gray level patterns is different from the interval of another pair of adjacent gray level patterns among the gray level patterns. | 09-09-2010 |
20100231604 | Method and Related Apparatus for Improving Image Quality of Liquid Crystal Display Device - A method for improving an image quality of a liquid crystal display (LCD) device includes receiving an input image, generating a plurality of consecutive pictures of a predefined period number according to the input image, wherein a gray level of the input image is greater than a gray level of the plurality of contiguous pictures, setting a number of pixels required for adding a value among the plurality of contiguous pictures for every display element according to a least significant bits (LSB) of a pixel of the input image, and enforcing the number of add-value pixels of a positive polarity closes the number of add-value pixels of a negative polarity according to the number of add-value pixels in each of the plurality of consecutive pictures and the polarity of the corresponding display element. | 09-16-2010 |
20100238193 | PROGRAMMABLE DITHERING FOR VIDEO DISPLAYS - 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. | 09-23-2010 |
20100253699 | Methods and Systems for Improved Processing of Digital Image Data - Aspects of the present invention comprise systems and methods for efficient image processing. Some aspects relate to non-sequential processing of image data to reduce processing time Some aspects relate to image processing methods that reduce memory read and/or write operations. Some aspects relate to image processing methods that combine image resizing and image halftoning processes. | 10-07-2010 |
20110007090 | FLAT DISPLAY APPARATUS CAPABLE OF COMPENSATING A PANEL DEFECT ELECTRICALLY AND PICTURE QUALITY CONTROLLING METHOD THEREOF - A flat panel display device and a picture quality controlling method thereof is provided. The flat panel display device includes a display panel. A memory stores location information about a panel defect location on the display panel and a compensation value to be dispersed for a plurality of frame periods. A compensating part detects the data to be displayed at the panel defect location and adjusts the data to be displayed at the panel defect location with the compensation value from the memory. | 01-13-2011 |
20110012918 | Circuit for Performing Dithering on Pixels of a Display and Method Thereof - 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. | 01-20-2011 |
20110012919 | MULTILEVEL HALFTONE SCREEN AND SETS THEREOF - A three-dimensional halftone screen is provided that is suited for multilevel printing. The three-dimensional halftone screen includes a plurality of planes each corresponding to one or more input intensity levels of an input RIPped pixel. Within the planes are screen dots, each associated with one or more output exposure intensity values representing an intensity of an exposure dot corresponding to the input RIPped pixel. | 01-20-2011 |
20110057949 | SEMICONDUCTOR INTEGRATED CIRCUIT, DISPLAY DEVICE, AND DISPLAY CONTROL METHOD - A semiconductor integrated circuit includes a plurality of data hold circuits that are associated with a plurality of pixel columns arranged in a pixel arranged area where a plurality of pixels are arranged in matrix, each of the plurality of data hold circuits being configured to hold data which is to be supplied to the pixel column; and a plurality of selectors, each selector being configured to selectively supply, based on whether a shift process for dithering is to be performed or not, one of outputs of a pair of data hold circuits coupled to said selector to the pixel column included in a pair of pixel columns that is associated with said pair of data hold circuits, said pair of pixel columns comprising pixel columns positioned side by side in the pixel arranged area. | 03-10-2011 |
20110096088 | ELECTROPHORESIS DISPLAY - An electrophoresis display includes a temperature sensor, a memory, a central processing unit and a display unit. The temperature sensor senses and outputs a present temperature. The memory stores a temperature characteristic table. The central processing unit is electrically coupled to the temperature sensor and the memory. The central processing unit receives the present temperature and reads the temperature characteristic table for matching the present temperature with the temperature characteristic table to obtain and output a drive level or timing. The display unit is electrically coupled to the central processing unit for receiving the drive level or timing and displaying according to the drive level. | 04-28-2011 |
20110157216 | LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONIC DEVICE - To provide a liquid crystal display device which can perform image display in both modes: a reflective mode where external light is used as an illumination light source; and a transmissive mode where a backlight is used. In one pixel, a region where incident light through a liquid crystal layer is reflected to perform display (reflective region) and a region through which light from the backlight passes to perform display (transmissive region) are provided, and image display can be performed in both modes: the reflective mode where external light is used as an illumination light source; and the transmissive mode where the backlight is used as an illumination light source. In addition, two transistors connected to respective pixel electrode layers are provided in one pixel, and the two transistors are separately operated, whereby display of the reflective region and display of the transmissive region can be controlled independently. | 06-30-2011 |
20110227941 | METHOD FOR GENERATING LOOKUP TABLE FOR COLOR CORRECTION FOR DISPLAY DEVICE - A method for generating a lookup table for color correction for a display device includes obtaining measured stimulus values for grayscales of primaries displayed on the display device, obtaining target stimulus values for the grayscales of the primaries, and obtaining the lookup table by comparing the measured stimulus values for the grayscales of the primaries and the target stimulus values for the grayscales of the primaries. The present invention employs the measured display characteristic to calculate the corresponding lookup table for color correction for the display device for achieving desired color temperature and brightness curve. It makes the adjustment of color temperature and brightness more accurate and quicker to reduce cost. | 09-22-2011 |
20120081388 | SCALING FOR A LCD BASED UPON VIEWING ANGLE - A method for image processing for a liquid crystal display comprising determining a dithered image and an interpolated based upon the image. The images are blended to form a blended image for displaying on the display. | 04-05-2012 |
20120120096 | Image Control for Displays - Displays such as televisions, computer monitors, and the like may boost ( | 05-17-2012 |
20120154428 | SPATIO-TEMPORAL COLOR LUMINANCE DITHERING TECHNIQUES - Systems and methods are disclosed to enable the creation and the display of spatio-temporal dithered images. Embodiments include techniques that use color-shifting and luminance. In one embodiment, adjacent pixels are color-shifted with respect to each other and the color values of the adjacent pixels are temporally alternated with color values of pixels in the group. In another embodiment, the luminance of group of adjacent pixels is determined and the luminance of the group is made more homogenous spatially and temporally by distributing color variations over a larger number of pixels so as to reduce the luminance difference between the pixel with the least luminance and the pixel with the greatest luminance. Individual color components (e.g., red, green, blue) may also be separated and used so that the color-shifts associated with each color component may be simultaneously present in different pixels. | 06-21-2012 |
20120162245 | AMBIENT ADAPTIVE ILLUMINATION OF A LIQUID CRYSTAL DISPLAY - A system for modification of an image to be displayed on a display includes receiving an input image and adjusting a luminance level for a backlight of the display for displaying the input image based upon an ambient lighting level and a visual system responsive model to the ambient lightening level. | 06-28-2012 |
20120200590 | Determining a layout of graphic objects according to a layout density map - A method performed by a physical computing system for determining a layout of graphic objects ( | 08-09-2012 |
20120229497 | DEVICES AND METHODS FOR DYNAMIC DITHERING - 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. | 09-13-2012 |
20120249573 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND COMPUTER-READABLE MEDIUM - 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. | 10-04-2012 |
20120268478 | Method for Dithering in Display Panel and Associated Apparatus - 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. | 10-25-2012 |
20120281011 | METHOD OF DISPLAYING TEXT IN A TEXT EDITOR - 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. | 11-08-2012 |
20120293540 | SYSTEMS AND METHODS FOR DITHER STRUCTURE CREATION AND APPLICATION - Embodiments of the present invention comprise systems and methods for creation, modification and implementation of dither pattern structures. | 11-22-2012 |
20130002703 | Non-Real-Time Dither Using a Programmable Matrix - 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. | 01-03-2013 |
20130002704 | LIQUID CRYSTAL DISPLAY DEVICE - 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. | 01-03-2013 |
20130050248 | COLOR DISPLAY METHOD AND COLOR DISPLAY APPARATUS - 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. | 02-28-2013 |
20130069974 | HYBRID VIDEO HALFTONING TECHNIQUES - 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. | 03-21-2013 |
20130135338 | METHOD AND SYSTEM FOR SUBPIXEL-LEVEL IMAGE MULTITONING - 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. | 05-30-2013 |
20130141455 | IMAGE DITHERING MODULE - 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. | 06-06-2013 |
20130201205 | METHOD OF STORING DATA, METHOD OF COMPENSATING DATA, AND DISPLAY DEVICE FOR PERFORMING THE SAME - 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. | 08-08-2013 |
20130249936 | MULTI-LEVEL STOCHASTIC DITHERING WITH NOISE MITIGATION VIA SEQUENTIAL TEMPLATE AVERAGING - 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. | 09-26-2013 |
20130257897 | DISPLAY APPARATUS - A display apparatus including an image signal controller, a dither memory, and a display panel. The display panel includes a dither block including pixels displaying an image in response to a dither image signal. The dither memory stores a dither set corresponding to a dither level. The dither set includes dither patterns. Each dither pattern determines that a corresponding pixel is a dither pixel that is to be dithered and a polarity of the dither pixel. A combined matrix, obtained by adding respective dither polarity matrices of the dither patterns, is zero. Thus, although the same image is displayed for a long time, an after-image caused by accumulation of the polarity may be prevented. | 10-03-2013 |
20130307867 | HALFTONE IMAGE GENERATION METHOD AND IMAGE PROCESSING SYSTEM AND COMPUTER PROGRAM PRODUCT THEREOF - A halftone image generation method used in a system including a quantizer, a subtracter, a post-dithering module and an adder for generating a halftone image is disclosed. First, an original image including original pixels having original pixel values is received by the quantizer and a quantized image including quantized pixels having quantized pixel values according to a predetermined threshold is generated by the quantizer. The quantized pixel values from the original pixel values are subtracted by the subtracter so as to generate quantization error values. A post-dithering process is performed by the post-dithering module to generate dither values by using the quantization error values. The quantized pixel values of the quantized image are added to the dither values by the adder. Finally, the halftone image including halftone pixels having halftone pixel values is generated. | 11-21-2013 |
20130328910 | DYNAMICALLY GENERATED IMAGES AND EFFECTS - A shape may be virtually generated from a formula specifying a scalable property of the shape that determines the appearance of the shape as the size of the shape is changed. Once the shape is generated, a reflection and/or shadow may be generated according to one or more customizable parameters specifying different properties of the reflection and/or shadow. Reflections and shadows may be regenerated with shapes each time the shapes are resized. Each generated shape, reflection, and/or shadow may then be outputted to a display. Systems, methods, and computer readable media are provided. | 12-12-2013 |
20140022274 | HIGH DYNAMIC RANGE DISPLAY SYSTEMS - A display system and method of producing images with high dynamic range are provided. The display system employs multiple light valves for projecting a portion of the image onto another. | 01-23-2014 |
20140071155 | METHOD OF PRODUCING A REFLECTIVE OR REFRACTIVE SURFACE - A method and apparatus for producing a reflective or refractive surface that reflects or refracts light shined thereon and reproduces on a screen a desired greyscale intensity image on which the reflective or refractive surface is based and a corresponding apparatus, wherein the method permits a reproduction of a reference grayscale image with adjustable precision. | 03-13-2014 |
20140204113 | CARRY TABLE GENERATING METHOD - A carry table generating method is provided for generating N dither carry tables, so as to dither N pixel blocks, wherein a size of the pixel block is N×N, and N is an integer greater than 1. The carry table generating method comprises the following steps: reading a plurality of basic tables from a memory, wherein the base tables are corresponding to a plurality of basic blocks, the number of the basic blocks is smaller than N, and the size of the basic blocks is smaller than the size of the pixel blocks; expanding the size of the basic tables by a first conversion procedure, and expanding the number of the basic blocks by a second conversion procedure; and generating the dither carry tables by using the expanded basic blocks. | 07-24-2014 |
20140368531 | DYNAMIC CONTRAST ENHANCEMENT USING DITHERED GAMMA REMAPPING - Embodiments of the present invention generally provide a processing system for a display device. The processing system includes a histogram circuit configured to process a first plurality of pixel values associated with a first image to generate a first histogram. The processing system further includes a boost circuit configured to analyze the first histogram to determine a first boost level. Additionally, the processing system includes an interpolation circuit configured to interpolate, based on the first boost level, between a first boost mapping and a second boost mapping to generate a first intermediate boost mapping. The interpolation circuit is further configured to determine a first plurality of boosted pixel values based on the first intermediate boost mapping. | 12-18-2014 |
20150035851 | Method for Image Dithering - The present disclosure provides a method for image dithering. The method includes providing a polygon related to an integrated circuit (IC) layout design in a graphic database system (GDS) grid; converting the polygon to an intensity map in the GDS grid, the intensity map including a group of partial pixels and a group of full pixels; performing a first quantization process to a partial pixel to determine a first error; applying the first error to one or more full pixels; performing a second quantization process to a full pixel to determine a second error; and distributing the second error to one or more full pixels. The partial pixels correspond to pixels partially covered by the polygon, and the full pixels correspond to pixels fully covered by the polygon. | 02-05-2015 |
20150062149 | METHOD FOR PERFORMING DITHERING UPON BOTH NORMAL MODE AND SELF REFRESH MODE IN LOWER TRANSMISSION DATA RATE AND RELATED APPARATUS THEREOF - A self refresh method with dithering has at least the following steps: generating a plurality of original frames; performing a dithering process upon the plurality of original frames to generate a plurality of dithering frames to a timing controller; checking if the plurality of original frames is unaltered; and when it is detected that the plurality of original frames is unaltered, requesting the timing controller to enter a self refresh mode, and stopping transmission of dithering frames after transmitting a specific frame and dithering information associated with the specific frame to the timing controller for further dithering processing. | 03-05-2015 |
20150103094 | REGION-DEPENDENT COLOR MAPPING FOR REDUCING VISIBLE ARTIFACTS ON HALFTONED DISPLAYS - This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for displaying high resolution images with reduced visible halftone noise. In one aspect, an image having a plurality of image pixels is displayed on a display device having a plurality of display pixels, by mapping the tone or color of each input image pixel onto the plurality of display pixels by assigning each display pixel a tone or color value in the color space associated with the display device that is in a neighborhood of the tone or color of each input image pixel and appears to have the same perceptual tone or color value as the image pixel and has a lower visible halftone noise. A size of the neighborhood can be selected based on the color gradient in various portions of the image. | 04-16-2015 |
20160117794 | MODIFYING GRADATION IN AN IMAGE FRAME INCLUDING APPLYING A WEIGHTING TO A PREVIOUSLY PROCESSED PORTION OF THE IMAGE FRAME - An apparatus and methods for modifying gradation in an image frame determine a blend factor indicating a first weighting associated with a previously processed portion of the image frame. The apparatus and methods generate a weighted value associated with a current region of the image frame based on the current region of the image frame and based on applying the first weighting to the previously processed portion of the image frame so as to modify the gradation in the image frame. | 04-28-2016 |
20160125788 | DITHERING FOR IMAGE DATA TO BE DISPLAYED - Techniques related to image dithering are described herein. The techniques include receiving an image to be displayed at a display device and entering a content adaptive backlight control mode. The image is dithered during the content adaptive backlight control mode. The dithering is disabled during a panel self-refresh mode. | 05-05-2016 |