Back to results
US 5,877,754 AGranted
Process, apparatus, and system for color conversion of image signals
AssigneeIntel Corporation
InventorsMichael Keith, Stephen Wood
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeIntel Corporation
InventorsMichael Keith, Stephen Wood
Estimating the term…
A process, apparatus, and system for generating and using lookup tables to convert image signals from a multi-component format to a single-index CLUT format for an arbitrary CLUT palette. In a preferred embodiment, lookup tables are generated for an arbitrary CLUT palette and used to convert (with Y, U, and V dithering) three-component subsampled YUV9 video signals to 8-bit CLUT signals.
A computer-implemented process for displaying an image in a system having a CLUT palette, wherein the CLUT palette maps each CLUT signal C.sub.h of a plurality of CLUT signals C to a corresponding display signal d.sub.h of a plurality of display signals D, comprising the steps of:
An apparatus for displaying an image in a computer system having a CLUT palette, wherein the CLUT palette maps each CLUT signal C.sub.h of a plurality of CLUT signals C to a corresponding display signal d.sub.h of a plurality of display signals D, comprising:
A computer system for displaying an image, the computer system having an application and a CLUT palette, wherein the CLUT palette maps each CLUT signal c.sub.h of a plurality of CLUT signals C to a corresponding display signal d.sub.h of a plurality of display signals D, comprising:
A computer-implemented process for generating a color conversion table for an arbitrary CLUT palette, wherein the color conversion table maps each image signal S.sub.i of a plurality of image signals to a corresponding CLUT signal C.sub.i of a plurality of CLUT signals C, comprising the steps of:
A system for generating a color conversion table for an arbitrary CLUT palette, wherein the color conversion table maps each image signal S.sub.i of a plurality of image signals to a corresponding CLUT signal C.sub.i of a plurality of CLUT signals C, comprising a processor capable of:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Characterised by the way in which colour is displayed: using colour palettes, e.g. look-up tables
Using dithering: with use of a spatial dither pattern
Arrangements or circuits for control of indicating devices using static means to
Term ended 2 Mar 2016 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to digital image signal processing, and, in particular, to computer-implemented processes, apparatuses, and systems for color converting digital image signals.
2. Description of the Related Art
Other objects, features, and advantages of the present invention will become more fully apparent from the following detailed description of a preferred embodiment, the appended claims, and the accompanying drawings in which:
FIG. 1 is a block diagram of a video system for displaying video images in a PC environment, according to a preferred embodiment of the present invention;
FIG. 2 is a representation of YUV component space;
Description of Video System
Referring to FIG. 1, there is shown a block diagram of a video system 100 for displaying video images in a PC environment, according to a preferred embodiment of the present invention. Video system 100 is capable of performing in the compression and playback modes. The operations of video system 100 are controlled by operating system 112 which communicates with the other processing engines of video system 100 via system bus 120.
When video system 100 operates in compression mode, video generator 102 of video system 100 generates analog video signals and transmits those signals to capture processor 104. Capture processor 104 decodes (i.e., separates) the analog video signal into three linear components (one luminance component Y and two chrominance components U and V), digitizes each component, and scales the digitized signals. Scaling of the digitized signals preferably includes subsampling the U and V signals to generate digitized video signals in subsampled YUV9 format. Those skilled in the art will understand that YUV9 signals have one U-component signal and one V-component signal for every (4.times.4) block of Y-component signals.