OpenCV 3.3处理视差图返回的结果较小

我正在尝试从立体图像中获取视差图。当我尝试时 stereo_match.cpp

是关于参数吗?原因是什么?如何解决?

如何通过更改参数或其他事情来改善结果?

Ptr<StereoSGBM> sbm = StereoSGBM::create(16, 64, 3, 48, 192, 0, 0,10,200,100);
CV_WRAP static Ptr<StereoSGBM> create(int minDisparity = 0, int numDisparities = 16, int blockSize = 3,
                                          int P1 = 0, int P2 = 0, int disp12MaxDiff = 0,
                                          int preFilterCap = 0, int uniquenessRatio = 0,
                                          int speckleWindowSize = 0, int speckleRange = 0,
                                          int mode = StereoSGBM::MODE_SGBM);