RGB Color Space And It's Application

This paper primarily discussed the law of transforming all the color points in RGB color space into color points in chromaticity diagram. And grouped all the color points into eight color such as black, blue, green, cyan, red, purple, yellow and white according to color difference. At the same time, divided the visual points of chromaticity diagram by these eight colors in term of chromaticity coordinate, then the dividing line decided is much different from GB8416. It is more suited to regard as a practical criterion for color segmentation of RGB image.To segment a color image by one color, it must enhance the incident light on the wave band of this color. As for the object's surface color, different color surface, different spectrum reflectance. The color surface has much more selectivity, while there isn't selectivity of visual spectrum for black and white surface color.Made valuable questioning for density-histogram. (A) Gave mathematical definition of peak and dip, it's different from that defined by derivative and conception of extreme of continuous function as well, but compare the size of discrete array straightly based on the given horizontal value. (B) Brought forward conception of natural phrase and effectively reduced the classified numbers of 256 results by using it, so it's of be of it to histogram's classified study. (C) The method of the mth point in nth neighborhood can find and array's few key points, these key points will well reflect curve's peak and dip showed by the array. In (A), (B), (C), the multi-resolution of wavelet transformation is permeated for beginning to end. In (A) and (B), the horizontal Value is scale while n is scale in (C), when the horizontal value and n are different,a series of results of different scale will be ocguired.Of course,using a few of key points is preferable to using on key point,therefore,if the 256 points are selected,as key point,then the curve showed by then is as same as curve showed by histogram.this is the multi-resolution idea of successive approximation.Finally, applied the method of color segmentation to segmentation of Dongting-lake water area and recognition for vehicle license plates and obtained preferable effects.