Image processing system with improved color compensation when transferring between color formats
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United States of America Patent
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Oct 22, 1996
Grant Date -
N/A
app pub date -
Feb 25, 1994
filing date -
Feb 25, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image processing system (10, 20) comprises a framestore (11) or other source of image data in a first color format (RGB) and is arranged to convert the data into data representing at least one color separation. A color rotator 14, such as a color transform matrix, is provided for rotating on a pixel-by-pixel basis the first color format data (RGB) into data in a second color format (NPQ) selected such that one of the colors thereof corresponds to the color of the at least one color separation. A look-up table (15) determines from the most significant parts of the data from the rotator (14) a range of color values in the second color format which includes the value of the color separation pixel. An interpolator (16) receives data defining the range of values from the look-up table and in response to the least significant parts of the data from the color rotator (14) interpolates the data from the look-up table to determine the value of the color separation pixel.
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Cited Art Landscape
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