双目立体匹配一直是双目视觉的研究热点，双目相机拍摄同一场景的左、右两幅视点图像，运用立体匹配匹配算法获取视差图，进而获取深度图。而深度图的应用范围非常广泛，由于其能够记录场景中物体距离摄像机的距离，可以用以测量、三维重建、以及虚拟视点的合成等(Binocular stereo matching has always been a research hotspot in binocular vision. Binocular cameras take left and right view images of the same scene and use stereo matching algorithm to obtain the disparity map and then obtain the depth map. Depth map has a wide range of applications. Because it can record the distance between objects in the scene and the camera, it can be used for measurement, 3d reconstruction and the synthesis of virtual viewpoints)