Transferring color between images is a method that borrows one image's color characteristics from another.This paper introduces a technique for transferring color with auto selecting swatches.It uses unsupervised clustering to partition the target and the source image data into a certain number of subsets with similar color

then selects certain larger density pixels in each subset to construct corresponding swatch.It creates optimized correspondence by matching texture character and luminance between subsets.The color information is transferred from the matched pixel in source swatch to the target one.When color transmission is done between the source and the target swatches

the final colors are assigned to each pixel of the target image by matching pixel to pixel in the target swatches in the way of comparing texture characteristics.The proposed auto selecting swatches algorithm can be used to transfer color not only between two color images but also between a grey image and a color image.Because this technique can automatically perform color transfer process without user selecting swatches

it can be conveniently applied to batch process and video

provided that composition

texture and luminance are sufficiently distinct.