Patent ID: 8860806

Claim:
A color enhancement device for carrying out color enhancement with regard to a whiteboard color image comprising: a whiteboard content extraction unit used to extract a foreground portion from the whiteboard color image, and let the foreground portion serve as whiteboard contents; a color channel stretch unit used to stretch R, G, and B channel values of each of a plurality of foreground pixels forming the extracted whiteboard contents; a color tone adjustment unit used to adjust, under a condition where color intensity of each of the foreground pixels is unchanged, color tone of the corresponding foreground pixel; a saturation degree to intensity ratio adjustment unit used to adjust, under a condition where the color tone of each of the foreground pixels is unchanged, a ratio of color saturation degree to color intensity of the corresponding foreground pixel so as to cause the ratio to approach a predetermined ratio expectation value r d ; and a saturation degree and intensity increase unit used to increase, under a condition where the color tone of each of the foreground pixels is unchanged, the color saturation degree and the color intensity of the corresponding foreground pixel so as to cause the two to approach a predetermined color saturation degree expectation value S d and a predetermined color intensity expectation value I d , respectively.