644 lines
19 KiB
C++
644 lines
19 KiB
C++
#include "opencv2/opencv_modules.hpp"
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#include "opencv2/core/core.hpp"
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#include "opencv2/ml/ml.hpp"
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#include "opencv2/highgui/highgui.hpp"
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#ifdef HAVE_OPENCV_OCL
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#define _OCL_KNN_ 1 // select whether using ocl::KNN method or not, default is using
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#define _OCL_SVM_ 1 // select whether using ocl::svm method or not, default is using
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#include "opencv2/ocl/ocl.hpp"
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#endif
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#include <stdio.h>
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using namespace std;
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using namespace cv;
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const Scalar WHITE_COLOR = Scalar(255,255,255);
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const string winName = "points";
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const int testStep = 5;
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Mat img, imgDst;
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RNG rng;
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vector<Point> trainedPoints;
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vector<int> trainedPointsMarkers;
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vector<Scalar> classColors;
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#define _NBC_ 0 // normal Bayessian classifier
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#define _KNN_ 0 // k nearest neighbors classifier
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#define _SVM_ 0 // support vectors machine
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#define _DT_ 1 // decision tree
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#define _BT_ 0 // ADA Boost
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#define _GBT_ 0 // gradient boosted trees
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#define _RF_ 0 // random forest
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#define _ERT_ 0 // extremely randomized trees
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#define _ANN_ 0 // artificial neural networks
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#define _EM_ 0 // expectation-maximization
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static void on_mouse( int event, int x, int y, int /*flags*/, void* )
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{
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if( img.empty() )
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return;
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int updateFlag = 0;
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if( event == CV_EVENT_LBUTTONUP )
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{
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if( classColors.empty() )
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return;
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trainedPoints.push_back( Point(x,y) );
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trainedPointsMarkers.push_back( (int)(classColors.size()-1) );
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updateFlag = true;
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}
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else if( event == CV_EVENT_RBUTTONUP )
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{
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#if _BT_
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if( classColors.size() < 2 )
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{
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#endif
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classColors.push_back( Scalar((uchar)rng(256), (uchar)rng(256), (uchar)rng(256)) );
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updateFlag = true;
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#if _BT_
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}
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else
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cout << "New class can not be added, because CvBoost can only be used for 2-class classification" << endl;
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#endif
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}
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//draw
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if( updateFlag )
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{
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img = Scalar::all(0);
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// put the text
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stringstream text;
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text << "current class " << classColors.size()-1;
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putText( img, text.str(), Point(10,25), FONT_HERSHEY_SIMPLEX, 0.8f, WHITE_COLOR, 2 );
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text.str("");
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text << "total classes " << classColors.size();
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putText( img, text.str(), Point(10,50), FONT_HERSHEY_SIMPLEX, 0.8f, WHITE_COLOR, 2 );
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text.str("");
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text << "total points " << trainedPoints.size();
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putText(img, text.str(), Point(10,75), FONT_HERSHEY_SIMPLEX, 0.8f, WHITE_COLOR, 2 );
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// draw points
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for( size_t i = 0; i < trainedPoints.size(); i++ )
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circle( img, trainedPoints[i], 5, classColors[trainedPointsMarkers[i]], -1 );
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imshow( winName, img );
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}
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}
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static void prepare_train_data( Mat& samples, Mat& classes )
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{
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Mat( trainedPoints ).copyTo( samples );
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Mat( trainedPointsMarkers ).copyTo( classes );
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// reshape trainData and change its type
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samples = samples.reshape( 1, samples.rows );
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samples.convertTo( samples, CV_32FC1 );
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}
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#if _NBC_
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static void find_decision_boundary_NBC()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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CvNormalBayesClassifier normalBayesClassifier( trainSamples, trainClasses );
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Mat testSample( 1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)normalBayesClassifier.predict( testSample );
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circle( imgDst, Point(x,y), 1, classColors[response] );
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}
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}
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}
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#endif
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#if _KNN_
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static void find_decision_boundary_KNN( int K )
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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#if defined HAVE_OPENCV_OCL && _OCL_KNN_
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cv::ocl::KNearestNeighbour knnClassifier;
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Mat temp, result;
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knnClassifier.train(trainSamples, trainClasses, temp, false, K);
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cv::ocl::oclMat testSample_ocl, reslut_ocl;
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#else
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CvKNearest knnClassifier( trainSamples, trainClasses, Mat(), false, K );
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#endif
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Mat testSample( 1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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#if defined HAVE_OPENCV_OCL && _OCL_KNN_
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testSample_ocl.upload(testSample);
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knnClassifier.find_nearest(testSample_ocl, K, reslut_ocl);
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reslut_ocl.download(result);
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int response = saturate_cast<int>(result.at<float>(0));
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circle(imgDst, Point(x, y), 1, classColors[response]);
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#else
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int response = (int)knnClassifier.find_nearest( testSample, K );
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circle( imgDst, Point(x,y), 1, classColors[response] );
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#endif
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}
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}
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}
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#endif
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#if _SVM_
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static void find_decision_boundary_SVM( CvSVMParams params )
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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#if defined HAVE_OPENCV_OCL && _OCL_SVM_
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cv::ocl::CvSVM_OCL svmClassifier(trainSamples, trainClasses, Mat(), Mat(), params);
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#else
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CvSVM svmClassifier( trainSamples, trainClasses, Mat(), Mat(), params );
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#endif
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Mat testSample( 1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)svmClassifier.predict( testSample );
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circle( imgDst, Point(x,y), 2, classColors[response], 1 );
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}
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}
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for( int i = 0; i < svmClassifier.get_support_vector_count(); i++ )
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{
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const float* supportVector = svmClassifier.get_support_vector(i);
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circle( imgDst, Point(saturate_cast<int>(supportVector[0]),saturate_cast<int>(supportVector[1])), 5, CV_RGB(255,255,255), -1 );
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}
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}
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#endif
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#if _DT_
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static void find_decision_boundary_DT()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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CvDTree dtree;
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Mat var_types( 1, trainSamples.cols + 1, CV_8UC1, Scalar(CV_VAR_ORDERED) );
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var_types.at<uchar>( trainSamples.cols ) = CV_VAR_CATEGORICAL;
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CvDTreeParams params;
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params.max_depth = 8;
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params.min_sample_count = 2;
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params.use_surrogates = false;
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params.cv_folds = 0; // the number of cross-validation folds
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params.use_1se_rule = false;
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params.truncate_pruned_tree = false;
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dtree.train( trainSamples, CV_ROW_SAMPLE, trainClasses,
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Mat(), Mat(), var_types, Mat(), params );
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Mat testSample(1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)dtree.predict( testSample )->value;
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circle( imgDst, Point(x,y), 2, classColors[response], 1 );
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}
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}
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}
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#endif
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#if _BT_
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void find_decision_boundary_BT()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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CvBoost boost;
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Mat var_types( 1, trainSamples.cols + 1, CV_8UC1, Scalar(CV_VAR_ORDERED) );
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var_types.at<uchar>( trainSamples.cols ) = CV_VAR_CATEGORICAL;
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CvBoostParams params( CvBoost::DISCRETE, // boost_type
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100, // weak_count
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0.95, // weight_trim_rate
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2, // max_depth
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false, //use_surrogates
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0 // priors
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);
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boost.train( trainSamples, CV_ROW_SAMPLE, trainClasses, Mat(), Mat(), var_types, Mat(), params );
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Mat testSample(1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)boost.predict( testSample );
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circle( imgDst, Point(x,y), 2, classColors[response], 1 );
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}
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}
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}
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#endif
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#if _GBT_
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void find_decision_boundary_GBT()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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CvGBTrees gbtrees;
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Mat var_types( 1, trainSamples.cols + 1, CV_8UC1, Scalar(CV_VAR_ORDERED) );
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var_types.at<uchar>( trainSamples.cols ) = CV_VAR_CATEGORICAL;
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CvGBTreesParams params( CvGBTrees::DEVIANCE_LOSS, // loss_function_type
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100, // weak_count
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0.1f, // shrinkage
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1.0f, // subsample_portion
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2, // max_depth
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false // use_surrogates )
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);
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gbtrees.train( trainSamples, CV_ROW_SAMPLE, trainClasses, Mat(), Mat(), var_types, Mat(), params );
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Mat testSample(1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)gbtrees.predict( testSample );
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circle( imgDst, Point(x,y), 2, classColors[response], 1 );
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}
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}
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}
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#endif
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#if _RF_
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void find_decision_boundary_RF()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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CvRTrees rtrees;
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CvRTParams params( 4, // max_depth,
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2, // min_sample_count,
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0.f, // regression_accuracy,
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false, // use_surrogates,
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16, // max_categories,
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0, // priors,
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false, // calc_var_importance,
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1, // nactive_vars,
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5, // max_num_of_trees_in_the_forest,
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0, // forest_accuracy,
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CV_TERMCRIT_ITER // termcrit_type
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);
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rtrees.train( trainSamples, CV_ROW_SAMPLE, trainClasses, Mat(), Mat(), Mat(), Mat(), params );
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Mat testSample(1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)rtrees.predict( testSample );
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circle( imgDst, Point(x,y), 2, classColors[response], 1 );
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}
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}
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}
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#endif
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#if _ERT_
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void find_decision_boundary_ERT()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// learn classifier
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CvERTrees ertrees;
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Mat var_types( 1, trainSamples.cols + 1, CV_8UC1, Scalar(CV_VAR_ORDERED) );
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var_types.at<uchar>( trainSamples.cols ) = CV_VAR_CATEGORICAL;
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CvRTParams params( 4, // max_depth,
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2, // min_sample_count,
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0.f, // regression_accuracy,
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false, // use_surrogates,
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16, // max_categories,
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0, // priors,
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false, // calc_var_importance,
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1, // nactive_vars,
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5, // max_num_of_trees_in_the_forest,
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0, // forest_accuracy,
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CV_TERMCRIT_ITER // termcrit_type
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);
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ertrees.train( trainSamples, CV_ROW_SAMPLE, trainClasses, Mat(), Mat(), var_types, Mat(), params );
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Mat testSample(1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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int response = (int)ertrees.predict( testSample );
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circle( imgDst, Point(x,y), 2, classColors[response], 1 );
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}
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}
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}
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#endif
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#if _ANN_
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void find_decision_boundary_ANN( const Mat& layer_sizes )
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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// prerare trainClasses
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trainClasses.create( trainedPoints.size(), classColors.size(), CV_32FC1 );
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for( int i = 0; i < trainClasses.rows; i++ )
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{
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for( int k = 0; k < trainClasses.cols; k++ )
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{
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if( k == trainedPointsMarkers[i] )
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trainClasses.at<float>(i,k) = 1;
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else
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trainClasses.at<float>(i,k) = 0;
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}
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}
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Mat weights( 1, trainedPoints.size(), CV_32FC1, Scalar::all(1) );
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// learn classifier
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CvANN_MLP ann( layer_sizes, CvANN_MLP::SIGMOID_SYM, 1, 1 );
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ann.train( trainSamples, trainClasses, weights );
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Mat testSample( 1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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Mat outputs( 1, classColors.size(), CV_32FC1, testSample.data );
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ann.predict( testSample, outputs );
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Point maxLoc;
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minMaxLoc( outputs, 0, 0, 0, &maxLoc );
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circle( imgDst, Point(x,y), 2, classColors[maxLoc.x], 1 );
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}
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}
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}
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#endif
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#if _EM_
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void find_decision_boundary_EM()
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{
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img.copyTo( imgDst );
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Mat trainSamples, trainClasses;
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prepare_train_data( trainSamples, trainClasses );
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vector<cv::EM> em_models(classColors.size());
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CV_Assert((int)trainClasses.total() == trainSamples.rows);
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CV_Assert((int)trainClasses.type() == CV_32SC1);
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for(size_t modelIndex = 0; modelIndex < em_models.size(); modelIndex++)
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{
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const int componentCount = 3;
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em_models[modelIndex] = EM(componentCount, cv::EM::COV_MAT_DIAGONAL);
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Mat modelSamples;
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for(int sampleIndex = 0; sampleIndex < trainSamples.rows; sampleIndex++)
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{
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if(trainClasses.at<int>(sampleIndex) == (int)modelIndex)
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modelSamples.push_back(trainSamples.row(sampleIndex));
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}
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// learn models
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if(!modelSamples.empty())
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em_models[modelIndex].train(modelSamples);
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}
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// classify coordinate plane points using the bayes classifier, i.e.
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// y(x) = arg max_i=1_modelsCount likelihoods_i(x)
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Mat testSample(1, 2, CV_32FC1 );
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for( int y = 0; y < img.rows; y += testStep )
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{
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for( int x = 0; x < img.cols; x += testStep )
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{
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testSample.at<float>(0) = (float)x;
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testSample.at<float>(1) = (float)y;
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Mat logLikelihoods(1, em_models.size(), CV_64FC1, Scalar(-DBL_MAX));
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for(size_t modelIndex = 0; modelIndex < em_models.size(); modelIndex++)
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{
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if(em_models[modelIndex].isTrained())
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logLikelihoods.at<double>(modelIndex) = em_models[modelIndex].predict(testSample)[0];
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}
|
|
Point maxLoc;
|
|
minMaxLoc(logLikelihoods, 0, 0, 0, &maxLoc);
|
|
|
|
int response = maxLoc.x;
|
|
circle( imgDst, Point(x,y), 2, classColors[response], 1 );
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int main()
|
|
{
|
|
cout << "Use:" << endl
|
|
<< " right mouse button - to add new class;" << endl
|
|
<< " left mouse button - to add new point;" << endl
|
|
<< " key 'r' - to run the ML model;" << endl
|
|
<< " key 'i' - to init (clear) the data." << endl << endl;
|
|
|
|
cv::namedWindow( "points", 1 );
|
|
img.create( 480, 640, CV_8UC3 );
|
|
imgDst.create( 480, 640, CV_8UC3 );
|
|
|
|
imshow( "points", img );
|
|
cvSetMouseCallback( "points", on_mouse );
|
|
|
|
for(;;)
|
|
{
|
|
uchar key = (uchar)waitKey();
|
|
|
|
if( key == 27 ) break;
|
|
|
|
if( key == 'i' ) // init
|
|
{
|
|
img = Scalar::all(0);
|
|
|
|
classColors.clear();
|
|
trainedPoints.clear();
|
|
trainedPointsMarkers.clear();
|
|
|
|
imshow( winName, img );
|
|
}
|
|
|
|
if( key == 'r' ) // run
|
|
{
|
|
#if _NBC_
|
|
find_decision_boundary_NBC();
|
|
namedWindow( "NormalBayesClassifier", WINDOW_AUTOSIZE );
|
|
imshow( "NormalBayesClassifier", imgDst );
|
|
#endif
|
|
#if _KNN_
|
|
int K = 3;
|
|
find_decision_boundary_KNN( K );
|
|
namedWindow( "kNN", WINDOW_AUTOSIZE );
|
|
imshow( "kNN", imgDst );
|
|
|
|
K = 15;
|
|
find_decision_boundary_KNN( K );
|
|
namedWindow( "kNN2", WINDOW_AUTOSIZE );
|
|
imshow( "kNN2", imgDst );
|
|
#endif
|
|
|
|
#if _SVM_
|
|
//(1)-(2)separable and not sets
|
|
CvSVMParams params;
|
|
params.svm_type = CvSVM::C_SVC;
|
|
params.kernel_type = CvSVM::POLY; //CvSVM::LINEAR;
|
|
params.degree = 0.5;
|
|
params.gamma = 1;
|
|
params.coef0 = 1;
|
|
params.C = 1;
|
|
params.nu = 0.5;
|
|
params.p = 0;
|
|
params.term_crit = cvTermCriteria(CV_TERMCRIT_ITER, 1000, 0.01);
|
|
|
|
find_decision_boundary_SVM( params );
|
|
namedWindow( "classificationSVM1", WINDOW_AUTOSIZE );
|
|
imshow( "classificationSVM1", imgDst );
|
|
|
|
params.C = 10;
|
|
find_decision_boundary_SVM( params );
|
|
namedWindow( "classificationSVM2", WINDOW_AUTOSIZE );
|
|
imshow( "classificationSVM2", imgDst );
|
|
#endif
|
|
|
|
#if _DT_
|
|
find_decision_boundary_DT();
|
|
namedWindow( "DT", WINDOW_AUTOSIZE );
|
|
imshow( "DT", imgDst );
|
|
#endif
|
|
|
|
#if _BT_
|
|
find_decision_boundary_BT();
|
|
namedWindow( "BT", WINDOW_AUTOSIZE );
|
|
imshow( "BT", imgDst);
|
|
#endif
|
|
|
|
#if _GBT_
|
|
find_decision_boundary_GBT();
|
|
namedWindow( "GBT", WINDOW_AUTOSIZE );
|
|
imshow( "GBT", imgDst);
|
|
#endif
|
|
|
|
#if _RF_
|
|
find_decision_boundary_RF();
|
|
namedWindow( "RF", WINDOW_AUTOSIZE );
|
|
imshow( "RF", imgDst);
|
|
#endif
|
|
|
|
#if _ERT_
|
|
find_decision_boundary_ERT();
|
|
namedWindow( "ERT", WINDOW_AUTOSIZE );
|
|
imshow( "ERT", imgDst);
|
|
#endif
|
|
|
|
#if _ANN_
|
|
Mat layer_sizes1( 1, 3, CV_32SC1 );
|
|
layer_sizes1.at<int>(0) = 2;
|
|
layer_sizes1.at<int>(1) = 5;
|
|
layer_sizes1.at<int>(2) = classColors.size();
|
|
find_decision_boundary_ANN( layer_sizes1 );
|
|
namedWindow( "ANN", WINDOW_AUTOSIZE );
|
|
imshow( "ANN", imgDst );
|
|
#endif
|
|
|
|
#if _EM_
|
|
find_decision_boundary_EM();
|
|
namedWindow( "EM", WINDOW_AUTOSIZE );
|
|
imshow( "EM", imgDst );
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|