Method and apparatus for compensating for color variation in a v

Details Method and apparatus for compensating for color variation in a v Method and apparatus for compensating for color variation in a v

1997-01-07

1998-12-15

Tran, Phuoc

Image analysis

Color image processing

Pattern recognition or classification using color

382103, 382167, G06K 900

Patent

active

058504737

ABSTRACT:
Compensating for color variations affecting color detection by a video system. In one aspect, compensation for highlights of a prop having multiple color regions is provided. The prop is preferably designed so that every color region of the prop is affected by highlights at the same rate. The color mix ratio for a color region of the prop representing the deviation of the color region from a nominal color value is computed, and an expected color for each color region of the prop is then computed based on the color mix ratio. In another aspect, compensation for variations in a light source illuminating the environment detected by the video system are provided in combination with highlight compensation. A white color balance ratio for a frame of video data is estimated, the color ratios of background white pixels are detected and these ratios are then used to continually update the estimate of the white color balance ratios.

REFERENCES:
patent: 5400081 (1995-03-01), Chaplin

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