Specified image-area extracting method and device

Details Specified image-area extracting method and device Specified image-area extracting method and device

1996-07-25

2000-07-11

Coles, Edward L.

Facsimile and static presentation processing

Natural color facsimile

Specific image-processing circuitry

358538, 358528, 358523, 358522, 358520, H04N 146, G03F 308

Patent

active

060881372

ABSTRACT:
A face (skin color) area of a person is extracted with minimized error irrespective of different skin colors of the human races. A hue value calculating portion determines a hue value from an input image (RGB signal). A primary discriminating portion extracts pixels having hue value that lies in a specified range defined by limiting values outputted from a control portion. A pixel-counting portion counts the extracted pixels. The control portion selects a threshold value for extracting a face area according to the count of the extracted pixels and outputs the threshold value to a face-area extracting portion which in turn extracts a face area according to the threshold value.

REFERENCES:
patent: 5296945 (1994-03-01), Nishikawa et al.
patent: 5680230 (1997-10-01), Kaburagi
patent: 5729295 (1998-03-01), Okada

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