Merge pull request #10749 from alalek:issue_10736

samples/cpp/tutorial_code/calib3d/stereoBM/SBM_Sample.cpp

-/**
- * @file SBM_Sample
- * @brief Get a disparity map of two images
- * @author A. Huaman
- */
-
-#include <iostream>
-#include "opencv2/calib3d.hpp"
-#include "opencv2/imgcodecs.hpp"
-#include "opencv2/highgui.hpp"
-
-using namespace cv;
-
-const char *windowDisparity = "Disparity";
-
-void readme();
-
-/**
- * @function main
- * @brief Main function
- */
-int main()
-{
-  readme();
-
-  //-- 1. Read the images
-  Mat imgLeft = imread( "../data/rubberwhale1.png", IMREAD_GRAYSCALE );
-  Mat imgRight = imread( "../data/rubberwhale2.png", IMREAD_GRAYSCALE );
-  //-- And create the image in which we will save our disparities
-  Mat imgDisparity16S = Mat( imgLeft.rows, imgLeft.cols, CV_16S );
-  Mat imgDisparity8U = Mat( imgLeft.rows, imgLeft.cols, CV_8UC1 );
-
-  if( imgLeft.empty() || imgRight.empty() )
-  { std::cout<< " --(!) Error reading images " << std::endl; return -1; }
-
-  //-- 2. Call the constructor for StereoBM
-  int ndisparities = 16*5;   /**< Range of disparity */
-  int SADWindowSize = 21; /**< Size of the block window. Must be odd */
-
-  Ptr<StereoBM> sbm = StereoBM::create( ndisparities, SADWindowSize );
-
-  //-- 3. Calculate the disparity image
-  sbm->compute( imgLeft, imgRight, imgDisparity16S );
-
-  //-- Check its extreme values
-  double minVal; double maxVal;
-
-  minMaxLoc( imgDisparity16S, &minVal, &maxVal );
-
-  printf("Min disp: %f Max value: %f \n", minVal, maxVal);
-
-  //-- 4. Display it as a CV_8UC1 image
-  imgDisparity16S.convertTo( imgDisparity8U, CV_8UC1, 255/(maxVal - minVal));
-
-  namedWindow( windowDisparity, WINDOW_NORMAL );
-  imshow( windowDisparity, imgDisparity8U );
-
-  //-- 5. Save the image
-  imwrite("SBM_sample.png", imgDisparity16S);
-
-  waitKey(0);
-
-  return 0;
-}
-
-/**
- * @function readme
- */
-void readme()
-{ std::cout << " Usage: ./SBMSample <imgLeft> <imgRight>" << std::endl; }