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To solve the color image segmentation problem in the color image printing process, a new segmentation algorithm is proposed based on PCA and combined with other typical image segmentation algorithms. According to the proposed algorithm, firstly PCA is used to decompose the original image into two parts; secondly, the K-Means algorithm is used to divide the primal part of image and then twice-watershed algorithm is used to divide the remnant part of image; finally, the segmented images are got by merging the two kinds of segmentation images. This proposed algorithm can be applied to color printing image segmentation and automatic color printing control during the process of color image printing.