Method of extracting characteristic image data and color data co

Details Method of extracting characteristic image data and color data co Method of extracting characteristic image data and color data co

1994-08-24

1996-03-05

Couso, Yon J.

Image analysis

Color image processing

358520, G06K 946

Patent

active

054974313

ABSTRACT:
A method of extracting characteristic image data by dividing, on the basis of hues, an original image into color regions, and after regions which contact an outer edge of the original image have been eliminated, extracting regions likely to be face regions; and a color data conversion device for an image processing apparatus in which lightness values are determined by simple calculation on the basis of data of respective colors which have been photometrically measured, and hue values and saturation values are outputted by use of tables. Characteristic image data of the original image can be extracted with high precision, and calculating time for converting the data of the respective colors, which have been photometrically measured, into hue, saturation and lightness can be reduced.

REFERENCES:
patent: 4649423 (1987-03-01), Hoffrichter
patent: 4668979 (1987-05-01), Jung
patent: 5150199 (1992-09-01), Shoemaker et al.
patent: 5202935 (1993-04-01), Kanamori et al.
patent: 5278921 (1994-01-01), Nakamura
patent: 5398121 (1995-03-01), Kowalewski
patent: 5442717 (1995-08-01), Murakami

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