Linear interpolator for color correction
Horizontal compression of pixels in a reduced-size video image utilizing cooperating subsampling and display rates
Color video signal processing device with encoding and compression
Color image processing apparatus
Color image gamut-mapping system with chroma enhancement at human-insensitive spatial frequencies
Apparatus for subsampling chrominance
Color converting apparatus for performing a three-dimensional color conversion of a colored picture in a color space with a small capacity of memory
Sequential product code quantization of digital color image
System for correcting color images using tetrahedral interpolation over a hexagonal lattice
Reduced storage of pre-computed difference tables used in color space conversion
ApplicationNo. 004650 filed on 01/08/1998
US Classes:358/518, Color correction358/504, Measuring, testing, and calibrating358/520, Hue, saturation and luminance382/167Color correction
ExaminersPrimary: Coles, Edward L.
Assistant: Pokrzywa, Joseph R.
Attorney, Agent or Firm
International ClassG03F 003/08
AbstractThe present invention is directed to a method and apparatus for improving the efficiency of color correcting subsampled luminance and chrominance based data. More specifically, the present invention is directed to a method of applying a full conversion between color spaces for one pixel in a selected pixel block. Chrominance values are assigned to the remaining pixels based upon their luminance values relative to the luminance value of the converted pixel. The invention may be used to convert between various types of color spaces, and may be used in the processing of both device dependent and device independent data.