A new stereo matching scheme from image pairs based on graph cuts is given, which can solve the problem of large color differences as the result of fusing matching results of graph cuts from different color spaces. This scheme builds normalized histogram and reference histogram from matching results, and uses clustering algorithm to process the two histograms. Region histogram statistical method is adopted to retrieve depth data to achieve final matching results. Regular stereo matching library is used to verify this scheme, and experiments reported in this paper support availability of this method for automatic image processing. This scheme renounces the step of manual selection for adaptive color space and can obtain stable matching results. The whole procedure can be executed automatically and improve the integration level of image analysis process.