Hexagonal color pixel structure with white pixels
First Claim
1. A method to convert pixel color values of a digital color imager into another color space having luminance as a component is comprising:
- providing a digital color imager comprising hexagonal red, green, blue and white pixels;
use sensor output of white pixels for luminance value Y;
calculate color values of destination color space from the output of the red, green and blue pixels using a correspondent conversion matrix.
7 Assignments
0 Petitions
Accused Products
Abstract
A digital color imager provides an extended luminance range, enabling a method for an easy transformation into all other color spaces having luminance as a component. White pixels are added to hexagonal red, green and blue pixels. These white pixels can alternatively have an extended dynamic range as described by U.S. Pat. No. (6,441,852 to Levine et al.). Especially the white pixels may have a larger size than the red, green, or blue pixels used. This larger size can be implemented by concatenation of “normal” size hexagonal white pixels. The output of said white pixels can be directly used for the luminance values Y of the destination color space. Therefore only the color values have to be calculated from the RGB values, leading to an easier and faster calculation. As an example chosen by the inventor the conversion to YCbCr color space has been shown in detail.
-
Citations
50 Claims
-
1. A method to convert pixel color values of a digital color imager into another color space having luminance as a component is comprising:
-
providing a digital color imager comprising hexagonal red, green, blue and white pixels; use sensor output of white pixels for luminance value Y; calculate color values of destination color space from the output of the red, green and blue pixels using a correspondent conversion matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method to convert pixel color values of a digital color imager into another color space having luminance as a component is comprising:
-
providing a digital color imager comprising hexagonal red, green, and blue pixels and additionally white pixels, wherein said white pixels have been concatenated from hexagonal white pixels; use sensor output of white pixels for luminance value Y; calculate color values of destination color space from the output of the red, green and blue pixels using a correspondent conversion matrix. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A method to convert pixel color values of a digital color imager into YCbCr color space:
-
providing a digital color imager comprising hexagonal red, green, blue and white pixels; use sensor output of white pixels for luminance value Y; calculate color values Cb and Cr from the output of the red, green and blue pixels using transformation parameters. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
-
36. A method to convert pixel color values of a digital color imager into YCbCr color space:
-
providing a digital color imager comprising hexagonal red, green, and blue pixels and additionally white pixels, wherein said white pixels have been concatenated from hexagonal white pixels; use sensor output of white pixels for luminance value Y; calculate color values Cb and Cr from the output of the red, green and blue pixels using transformation parameters. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
-
Specification