mirror of https://github.com/opencv/opencv.git
content and renamed to a more sensible name. Also fixed a wrong link in the actual display_image tutorial.pull/1842/head
StevenPuttemans
11 years ago
parent
70a4de20d7
commit
2427c03625
4 changed files with 33 additions and 209 deletions
@ -1,206 +0,0 @@ |
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// Video Image PSNR and SSIM
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#include <iostream> // for standard I/O |
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#include <string> // for strings |
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#include <iomanip> // for controlling float print precision |
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#include <sstream> // string to number conversion |
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#include <opencv2/imgproc/imgproc.hpp> // Gaussian Blur |
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#include <opencv2/core/core.hpp> // Basic OpenCV structures (cv::Mat, Scalar) |
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#include <opencv2/highgui/highgui.hpp> // OpenCV window I/O |
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using namespace std; |
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using namespace cv; |
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double getPSNR ( const Mat& I1, const Mat& I2); |
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Scalar getMSSIM( const Mat& I1, const Mat& I2); |
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static void help() |
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{ |
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cout |
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<< "\n--------------------------------------------------------------------------" << endl |
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<< "This program shows how to read a video file with OpenCV. In addition, it tests the" |
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<< " similarity of two input videos first with PSNR, and for the frames below a PSNR " << endl |
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<< "trigger value, also with MSSIM."<< endl |
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<< "Usage:" << endl |
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<< "./video-source referenceVideo useCaseTestVideo PSNR_Trigger_Value Wait_Between_Frames " << endl |
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<< "--------------------------------------------------------------------------" << endl |
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<< endl; |
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} |
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int main(int argc, char *argv[]) |
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{ |
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help(); |
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if (argc != 5) |
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{ |
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cout << "Not enough parameters" << endl; |
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return -1; |
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} |
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stringstream conv; |
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const string sourceReference = argv[1],sourceCompareWith = argv[2]; |
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int psnrTriggerValue, delay; |
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conv << argv[3] << argv[4]; // put in the strings
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conv >> psnrTriggerValue >> delay;// take out the numbers
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char c; |
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int frameNum = -1; // Frame counter
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VideoCapture captRefrnc(sourceReference), |
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captUndTst(sourceCompareWith); |
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if ( !captRefrnc.isOpened()) |
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{ |
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cout << "Could not open reference " << sourceReference << endl; |
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return -1; |
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} |
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if( !captUndTst.isOpened()) |
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{ |
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cout << "Could not open case test " << sourceCompareWith << endl; |
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return -1; |
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} |
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Size refS = Size((int) captRefrnc.get(CV_CAP_PROP_FRAME_WIDTH), |
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(int) captRefrnc.get(CV_CAP_PROP_FRAME_HEIGHT)), |
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uTSi = Size((int) captUndTst.get(CV_CAP_PROP_FRAME_WIDTH), |
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(int) captUndTst.get(CV_CAP_PROP_FRAME_HEIGHT)); |
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if (refS != uTSi) |
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{ |
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cout << "Inputs have different size!!! Closing." << endl; |
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return -1; |
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} |
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const char* WIN_UT = "Under Test"; |
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const char* WIN_RF = "Reference"; |
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// Windows
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namedWindow(WIN_RF, WINDOW_AUTOSIZE ); |
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namedWindow(WIN_UT, WINDOW_AUTOSIZE ); |
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moveWindow(WIN_RF, 400 , 0); //750, 2 (bernat =0)
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moveWindow(WIN_UT, refS.width, 0); //1500, 2
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cout << "Frame resolution: Width=" << refS.width << " Height=" << refS.height |
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<< " of nr#: " << captRefrnc.get(CV_CAP_PROP_FRAME_COUNT) << endl; |
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cout << "PSNR trigger value " << |
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setiosflags(ios::fixed) << setprecision(3) << psnrTriggerValue << endl; |
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Mat frameReference, frameUnderTest; |
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double psnrV; |
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Scalar mssimV; |
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for(;;) //Show the image captured in the window and repeat
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{ |
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captRefrnc >> frameReference; |
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captUndTst >> frameUnderTest; |
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if( frameReference.empty() || frameUnderTest.empty()) |
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{ |
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cout << " < < < Game over! > > > "; |
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break; |
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} |
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++frameNum; |
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cout <<"Frame:" << frameNum; |
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///////////////////////////////// PSNR ////////////////////////////////////////////////////
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psnrV = getPSNR(frameReference,frameUnderTest); //get PSNR
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cout << setiosflags(ios::fixed) << setprecision(3) << psnrV << "dB"; |
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//////////////////////////////////// MSSIM /////////////////////////////////////////////////
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if (psnrV < psnrTriggerValue) |
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{ |
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mssimV = getMSSIM(frameReference,frameUnderTest); |
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cout << " MSSIM: " |
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<< "R" << setiosflags(ios::fixed) << setprecision(3) << mssimV.val[2] * 100 |
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<< "G" << setiosflags(ios::fixed) << setprecision(3) << mssimV.val[1] * 100 |
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<< "B" << setiosflags(ios::fixed) << setprecision(3) << mssimV.val[0] * 100; |
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} |
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cout << endl; |
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////////////////////////////////// Show Image /////////////////////////////////////////////
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imshow( WIN_RF, frameReference); |
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imshow( WIN_UT, frameUnderTest); |
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c = (char)waitKey(delay); |
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if (c == 27) break; |
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} |
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return 0; |
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} |
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double getPSNR(const Mat& I1, const Mat& I2) |
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{ |
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Mat s1; |
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absdiff(I1, I2, s1); // |I1 - I2|
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s1.convertTo(s1, CV_32F); // cannot make a square on 8 bits
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s1 = s1.mul(s1); // |I1 - I2|^2
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Scalar s = sum(s1); // sum elements per channel
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double sse = s.val[0] + s.val[1] + s.val[2]; // sum channels
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if( sse <= 1e-10) // for small values return zero
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return 0; |
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else |
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{ |
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double mse =sse /(double)(I1.channels() * I1.total()); |
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double psnr = 10.0*log10((255*255)/mse); |
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return psnr; |
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} |
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} |
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Scalar getMSSIM( const Mat& i1, const Mat& i2) |
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{ |
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const double C1 = 6.5025, C2 = 58.5225; |
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/***************************** INITS **********************************/ |
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int d = CV_32F; |
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Mat I1, I2; |
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i1.convertTo(I1, d); // cannot calculate on one byte large values
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i2.convertTo(I2, d); |
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Mat I2_2 = I2.mul(I2); // I2^2
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Mat I1_2 = I1.mul(I1); // I1^2
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Mat I1_I2 = I1.mul(I2); // I1 * I2
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/*************************** END INITS **********************************/ |
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Mat mu1, mu2; // PRELIMINARY COMPUTING
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GaussianBlur(I1, mu1, Size(11, 11), 1.5); |
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GaussianBlur(I2, mu2, Size(11, 11), 1.5); |
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Mat mu1_2 = mu1.mul(mu1); |
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Mat mu2_2 = mu2.mul(mu2); |
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Mat mu1_mu2 = mu1.mul(mu2); |
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Mat sigma1_2, sigma2_2, sigma12; |
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GaussianBlur(I1_2, sigma1_2, Size(11, 11), 1.5); |
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sigma1_2 -= mu1_2; |
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GaussianBlur(I2_2, sigma2_2, Size(11, 11), 1.5); |
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sigma2_2 -= mu2_2; |
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GaussianBlur(I1_I2, sigma12, Size(11, 11), 1.5); |
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sigma12 -= mu1_mu2; |
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///////////////////////////////// FORMULA ////////////////////////////////
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Mat t1, t2, t3; |
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t1 = 2 * mu1_mu2 + C1; |
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t2 = 2 * sigma12 + C2; |
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t3 = t1.mul(t2); // t3 = ((2*mu1_mu2 + C1).*(2*sigma12 + C2))
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t1 = mu1_2 + mu2_2 + C1; |
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t2 = sigma1_2 + sigma2_2 + C2; |
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t1 = t1.mul(t2); // t1 =((mu1_2 + mu2_2 + C1).*(sigma1_2 + sigma2_2 + C2))
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Mat ssim_map; |
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divide(t3, t1, ssim_map); // ssim_map = t3./t1;
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Scalar mssim = mean( ssim_map ); // mssim = average of ssim map
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return mssim; |
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} |
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@ -0,0 +1,30 @@ |
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#include <opencv2/core/core.hpp> |
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#include <opencv2/highgui/highgui.hpp> |
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#include <iostream> |
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using namespace cv; |
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using namespace std; |
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int main( int argc, char** argv ) |
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{ |
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if( argc != 2) |
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{ |
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cout <<" Usage: display_image ImageToLoadAndDisplay" << endl; |
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return -1; |
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} |
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Mat image; |
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image = imread(argv[1], IMREAD_COLOR); // Read the file
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if(! image.data ) // Check for invalid input
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{ |
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cout << "Could not open or find the image" << std::endl ; |
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return -1; |
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} |
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namedWindow( "Display window", WINDOW_AUTOSIZE ); // Create a window for display.
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imshow( "Display window", image ); // Show our image inside it.
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waitKey(0); // Wait for a keystroke in the window
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return 0; |
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} |
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