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Class 348/631 - Luminance transition controls chrominance transition


Subclass of Class 348 - Television
Definition: Subject matter including a specific circuitry that sharpens
No. of patents: 79
Last issue date: 02/15/2011


1    
NumberTitleIssue Date
7889279Method and apparatus for suppressing cross-coloration in a video display device
A method for suppressing cross-coloration in a video display device includes receiving high-frequency components of luminance signals corresponding to scanlines of an image frame, determining luminance transitions according to the high-frequency components of the lu...
02/15/2011
7808558Adaptive color transient improvement
A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different region...
10/05/2010
7738044Method and apparatus for adjusting a chrominance signal
A composite video signal has a chrominance signal (14) and a luminance signal (10). A method and apparatus are disclosed for adjusting the chrominance signal (14) to obtain an enhanced chrominance signal (15) in which at least some transi...
06/15/2010
7532255Color transient improvement unit and method to reduce blurring at color transients in video images
A color transient improvement unit and method for improving color transients to remove blurring along the edges of color transitions is presented. A transient characterization unit calculates various transient characterization values for a color transient detection ...
05/12/2009
7471342Method and system for cross-luminance reduction in multi-standard television decoders
A method and system for correcting luma data and chroma data from a composite signal for a plurality of lines are disclosed. The method and system include correlating line data of the composite signal from a portion of the plurality of lines to provide a plurality o...
12/30/2008
7404645Image and light source modulation for a digital display system
Image processing enhances display quality by controlling both the image modulator and the light sources. The image processing system utilizes a combination of user inputs, system configuration, design information, sensor feedback, pixel modulation information...
07/29/2008
7375770Method for luminance transition improvement
A method for luminance transition improvement includes the following steps: inputting an image comprising a plurality of pixels comprising a first pixel; generating an extreme gray level according to the plurality of pixels; generating a first gray level difference ...
05/20/2008
7355570Method of expressing gray level of high load image and plasma display panel driving apparatus using the method
In a method of expressing a gray level of a high load image and an apparatus for driving a Plasma Display Panel (PDP) using the method, a load ratio of the input image signal is calculated, and an error diffusion of a lower bit of gray level data corresponding to th...
04/08/2008
7324700Image processor with sharpness enhancement
When an image inputted is displayed on the display, determined is an enhancing degree as a parameter for enhancing the sharpness of the input image by using at least one of information about a subject included in the input image and information about the display for...
01/29/2008
7289163Method and apparatus for adjusting color edge center in color transient improvement
An improved method for color transient enhancement in an input video frame of pixels. The luminance value of a current pixel is compared to that of neighboring pixels. A correction value is determined and the chrominance value of the current pixel is “pushed” to...
10/30/2007
7271851Adaptive color transient improvement
A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different region...
09/18/2007
7224406Digital signal processing system and method applied for chroma transition
A digital signal processing system and method applied for chroma transition, wherein the method has the acts of: performing a difference process on an original chroma signal C to obtain a first difference signal C′; calculating an absolute value |C′| of the firs...
05/29/2007
7193659Method and apparatus for compensating for chrominance saturation
A method of color saturation compensation in a video signal is disclosed. The method includes the steps of: processing a luminance signal component of the video signal; determining whether the processing of the luminance signal results in a change in chrominance sat...
03/20/2007
7172297High dynamic range display devices
A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. Elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen....
02/06/2007
7154557Joint pre-/post-processing approach for chrominance mis-alignment
This invention corrects chrominance misalignment that occurs during chrominance down-sampling and up-sampling. The invention extracts a binary index from the corresponding luminance signal. The binary index enables generation of a filter window. On down-sampling the...
12/26/2006
7057664Method and system for converting interlaced formatted video to progressive scan video using a color edge detection scheme
Aspects of the invention for converting interlace formatted video to progressive scan video, may include a color edge detector block (306) adapted to determined edges in interlaced formatted video. A threshold and gain processor block (308) coupled to ...
06/06/2006
7043093Program for processing image, recording medium of the program and method of and apparatus for processing image
At first, average brightness of each of frames of a moving image is calculated by a computer. Following that, a moving average along a time axis is calculated for each of the frames so that moving average brightness is generated as a reference data of brightness. Ne...
05/09/2006
7031514Image compression method
Bitmap digital image data having one or more color channels is divided into image sizes corresponding to an optimum processing unit set according to computer's processing capability and requested image quality. Each unit image data is further divided according to th...
04/18/2006
6992729Video processing method and device
A video processing method comprises the steps of dividing an entire input data region into three of first, second and third regions in order from the low level side thereof; setting, as an output data characteristic to input data, a trapezoidal characteristic which ...
01/31/2006
6947060Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method
An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance...
09/20/2005
6947098Video signal processing
A control signal (k_lum) derived from the luminance component (Y) of a video signal is used to adaptively control a temporal noise reduction filter (10) according to the level of motion in a video image. To compress the control signal for storage in a memory ...
09/20/2005
6917114Semiconductor device and method of fabricating the same
A semiconductor device and a fabricating method for the same are disclosed, in which when forming a capacitor sacrificial film pattern, even if a misalignment occurs, the degradation of the dielectric property due to a direct contact between the contact plug and the...
07/12/2005
6888578Method and system for cross-luminance reduction in multi-standard television decoders
A method and system for correcting luma data and chroma data from a composite signal for a plurality of lines are disclosed. The method and system include correlating line data of the composite signal from a portion of the plurality of lines to provide a plurality o...
05/03/2005
6775028Non-linear method of mapping the lightness and chroma of a display device gamut onto a printing device gamut
A method of mapping an input color gamut of an input device onto an output color gamut of an output device includes establishing a threshold chroma value in the input color gamut. For first input chroma values below the threshold chroma value, each first input chrom...
08/10/2004
6717622System and method for scalable resolution enhancement of a video image
A system and method for enhancing resolution in a video image includes acquiring a relatively low resolution video signal and applying a peaking function and analyzing the peaked signal to identify potential edges. The low resolution signal is then upconverted to a ...
04/06/2004
6697107Smoothing a digital color image using luminance values
A method for smoothing a digital color image having color pixels in which each colored pixel is expressed as one luminance and two chrominance color values, including computing parameters for at least two orientations for each pixel in the stored digital ...
02/24/2004
6671420Method for processing saturated intervals in video sequences
A method for processing saturated video intervals in a video sequence. The method either removes or retains the saturated interval. If the interval is removed, the sequence is altered to accommodate the removal. The accommodation is either complete elimin...
12/30/2003
6600517System and method for improving the sharpness of a video image
There is disclosed an apparatus for sharpening an edge in a video image. The apparatus comprises: 1) a first circuit for determining a first luminance value of a first pixel associated with the first edge and a second luminance value of a second pixel ass...
07/29/2003
6583824Color modification on a digital nonlinear editing system
A color modification system and method for reducing the number of computations performed on a pixel color. This reduction in computations increases the rate at which color modification may be performed and decreases the effects of rounding errors. Decreas...
06/24/2003
6580464Color difference signal correction apparatus
The present invention provides a color difference signal correction apparatus for correcting color difference of parts having no color, particularly white characters, which can make the correction with high accuracy also for images including lightly color...
06/17/2003
6507372Image enhancement circuit and method using mean matching/quantized mean matching histogram equalization and color compensation
In an image enhancement method and circuit, a luminance signal is extracted from input color signals. Histogram equalization is performed using a cumulative density function of the extracted luminance signal which is input in a screen unit. A transform fu...
01/14/2003
6462788Method and system for removing color bleeding artifacts by filtering the chrominance plane of decompressed images
A video frame is decomposed into blocks of pixels. Blocks that contain moving edges are not processed further. The remaining blocks are examined for the likelihood of having color bleeding artifacts, and not processed further if the likelihood is low. The...
10/08/2002
6421462Technique for differencing an image
A technique for differencing an image is disclosed. In one embodiment, the technique is realized by measuring light values in a scene to generate a first image and a second image. The first image is separated into first luminance and chrominance component...
07/16/2002
6417891Color modification on a digital nonlinear editing system
A color modification system and method for reducing the number of computations performed on a pixel color. This reduction in computations increases the rate at which color modification may be performed and decreases the effects of rounding errors. Decreas...
07/09/2002
6407746Image processing method for high speed display based on rotation of different kinds of data including reduced data and apparatus for the same
An image processing apparatus includes a data dividing section for dividing digital data into a plurality of blocks of data. A first parallel shift control section controls, block by block, first parallel shift for shifting the blocks of digital data to p...
06/18/2002
6400371Television signal chrominance adjustment
The invention provides an improved method and system for presenting color television signals. Television signal chrominance values for foreground elements are adjusted in response to television signal chrominance values for background elements, so as to m...
06/04/2002
6313883Method and apparatus for finite local enhancement of a video display reproduction of images
A method and apparatus for electronically processing video signals representing images of an object or scene so that details of some portion or all of the object or scene are enhanced in the video display reproduction of the images. Video image signals fr...
11/06/2001
6268890Image display apparatus with selected combinations of subfields displayed for a gray level
An image display apparatus is provided for reducing occurrences of moving image false-edges by preventing profound changes in "on"/"off" subfield distribution, and for displaying a sharp image that does not appear blurred. This is achieved by effectively ...
07/31/2001
6181385Method for processing transitional regions in a picture signal
A method is proposed for processing transitional regions in a picture signal. The picture signal comprises a sequence of digital pixel values. A number of adjacent pixel values, which contain a processing pixel value, are combined to form a processing blo...
01/30/2001
6137540Method and apparatus for correcting color difference signals
This invention relates to the color matching function used in connection with the luminance or white stretch function in a television video processor. Automatic adjustment in the amplitude of the color difference signals is provided to compensate for the ...
10/24/2000
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