Image segmentation is an effective way to analysis image, which has received more and more attention. The traditional image segmentation technology can't get the result of the semantic image segmentation. Because the image is the projection of the 3D world in the 2D plane, it is necessary to combine the scene depth information to guide the segmentation of the image. In this paper, it analysis the shortcomings of the traditional segmentation technology, and describe the way of the image segmentation through the automatic measurement of the depth information of the digital image, and then complete the image of the auto focus function.
