This invention relates to an image processing apparatus having a function of encoding or decoding image data and discloses a technique for extracting an image feature, especially a thin image portion of a specific color of an image, and for encoding the thin image portion with high efficiency to minimize...http://www.google.com.tw/patents/US5361147?utm_source=gb-gplus-share專利 US5361147 - Method and apparatus for encoding and decoding color images
