Abstract
In this paper, a method for natural color image expression using merge technique of similar picture elements is proposed. When the color and brightness gradient of picture elements are close to each other, the similar picture elements are merged in a region, and the region is painted with the average color of the picture elements. By selecting adaptive threshold value, expression color can progressively be controlled. The amount of expression color is effectively reduced with remaining the original image impression. Further, a decision method of optimum threshold value is given. It is examined that when the threshold value is high, a realistic image can be obtained.
