Color Enhancement
AssigneeEntropic Communications, Inc.
InventorPetrus W.G.M. De Kruif
Life of this patent
Estimating the term…
Abstract
In an image processor, a color format converter (CFC) converts a pixel (Pi,j), which is expressed in an RGB color space, into a converted pixel (PCi,j), which is expressed in an YUV color space. A color shift vector generator (CSO, SVC) generates a color shift vector (SVi,j), which is expressed in the YUV color space, on the basis of the converted pixel (PCi,j). An inverse color format converter (ICFC) converts the color shift vector (SVi,j) into a color enhancement vector (EVi,j), which is expressed in the RGB color space. An adder (ADD) adds the color enhancement vector (EVi,j) to the pixel (Pi,j) so as to obtain a color enhanced pixel (PEi,j).
Claims13
An image processor comprising:
- a color format converter (CFC) for converting a pixel (Pi,j), which is expressed in an RGB color space, into a converted pixel (PCi,j), which is expressed in an YUV color space;
- a color shift vector generator (CSO, SVC) for generating a color shift vector (SVi,j), which is expressed in the YUV color space, on the basis of the converted pixel (PCi,j);
- an inverse color format converter (ICFC) for converting the color shift vector (SVi,j) into a color enhancement vector (EVi,j), which is expressed in the RGB color space;
- and
- an adder (ADD) for adding the color enhancement vector (EVi,j) to the pixel (Pi,j) so as to obtain a color enhanced pixel (PEi,j).
A method of color enhancement comprising:
- a color format conversion step in which a pixel (Pi,j), which is expressed in an RGB color space, is converted into a converted pixel (Pi,j), which is expressed in an YUV color space;
- a color shift vector (SVi,j) generation step in which a color shift vector (SVi,j) is generated on the basis of the converted pixel (PCi,j), the color shift vector (SVi,j) being is expressed in the YUV color space;
- an inverse color format conversion step in which the color shift vector (SVi,j) is converted into a color enhancement vector (EVi,j), which is expressed in the RGB color space;
- and
- an addition step in which the color enhancement vector (EVi,j) is added to the pixel (Pi,j) so as to obtain a color enhanced pixel (PEi,j).
Dependencies are inferred from the claim text.