add softcascade to people detector sample

samples/cpp/CMakeLists.txt

@@ -4,7 +4,7 @@
 # ----------------------------------------------------------------------------
 
 SET(OPENCV_CPP_SAMPLES_REQUIRED_DEPS opencv_core opencv_flann opencv_imgproc
-    opencv_highgui opencv_ml opencv_video opencv_objdetect opencv_photo opencv_nonfree
+    opencv_highgui opencv_ml opencv_video opencv_objdetect opencv_photo opencv_nonfree opencv_softcascade
     opencv_features2d opencv_calib3d opencv_legacy opencv_contrib opencv_stitching opencv_videostab)
 
 ocv_check_dependencies(${OPENCV_CPP_SAMPLES_REQUIRED_DEPS})

samples/cpp/peopledetect.cpp

 #include "opencv2/imgproc/imgproc.hpp"
 #include "opencv2/objdetect/objdetect.hpp"
 #include "opencv2/highgui/highgui.hpp"
+#include <opencv2/softcascade/softcascade.hpp>
 
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
+#include <iostream>
+#include <vector>
+#include <string>
+#include <fstream>
 
-using namespace cv;
-using namespace std;
-
-// static void help()
-// {
-//     printf(
-//             "\nDemonstrate the use of the HoG descriptor using\n"
-//             "  HOGDescriptor::hog.setSVMDetector(HOGDescriptor::getDefaultPeopleDetector());\n"
-//             "Usage:\n"
-//             "./peopledetect (<image_filename> | <image_list>.txt)\n\n");
-// }
+void filter_rects(const std::vector<cv::Rect>& candidates, std::vector<cv::Rect>& objects);
 
 int main(int argc, char** argv)
 {
-    Mat img;
-    FILE* f = 0;
-    char _filename[1024];
+    const std::string keys =
+    "{help h usage ?    |     | print this message and exit }"
+    "{cascade c         |     | path to cascade xml, if empty HOG detector will be executed }"
+    "{frame f           |     | wildchart pattern to frame source}"
+    "{min_scale         |0.4  | minimum scale to detect }"
+    "{max_scale         |5.0  | maxamum scale to detect }"
+    "{total_scales      |55   | prefered number of scales between min and max }"
+    "{write_file wf     |0    | write to .txt. Disabled by default.}"
+    "{write_image wi    |0    | write to image. Disabled by default.}"
+    "{show_image si     |1    | show image. Enabled by default.}"
+    "{threshold thr     |-1   | detection threshold. Detections with score less then threshold will be ignored.}"
+    ;
+
+    cv::CommandLineParser parser(argc, argv, keys);
+    parser.about("Soft cascade training application.");
 
-    if( argc == 1 )
+    if (parser.has("help"))
     {
-        printf("Usage: peopledetect (<image_filename> | <image_list>.txt)\n");
+        parser.printMessage();
         return 0;
     }
-    img = imread(argv[1]);
 
-    if( img.data )
+    if (!parser.check())
+    {
+        parser.printErrors();
+        return 1;
+    }
+
+    int wf = parser.get<int>("write_file");
+    if (wf) std::cout << "resulte will be stored to .txt file with the same name as image." << std::endl;
+
+    int wi = parser.get<int>("write_image");
+    if (wi) std::cout << "resulte will be stored to image with the same name as input plus dt." << std::endl;
+
+    int si = parser.get<int>("show_image");
+
+    float minScale =  parser.get<float>("min_scale");
+    float maxScale =  parser.get<float>("max_scale");
+    int scales     =  parser.get<int>("total_scales");
+    int thr        =  parser.get<int>("threshold");
+
+    cv::HOGDescriptor hog;
+    cv::softcascade::Detector cascade;
+
+    bool useHOG = false;
+    std::string cascadePath = parser.get<std::string>("cascade");
+    if (cascadePath.empty())
     {
-        strcpy(_filename, argv[1]);
+        useHOG = true;
+        hog.setSVMDetector(cv::HOGDescriptor::getDefaultPeopleDetector());
+        std::cout << "going to use HOG detector." << std::endl;
     }
     else
     {
-        f = fopen(argv[1], "rt");
-        if(!f)
+        cv::FileStorage fs(cascadePath, cv::FileStorage::READ);
+        if( !fs.isOpened())
         {
-            fprintf( stderr, "ERROR: the specified file could not be loaded\n");
-            return -1;
+            std::cout << "Soft Cascade file " << cascadePath << " can't be opened." << std::endl << std::flush;
+            return 1;
+        }
+
+        cascade = cv::softcascade::Detector(minScale, maxScale, scales, cv::softcascade::Detector::DOLLAR);
+
+        if (!cascade.load(fs.getFirstTopLevelNode()))
+        {
+            std::cout << "Soft Cascade can't be parsed." << std::endl << std::flush;
+            return 1;
         }
     }
 
-    HOGDescriptor hog;
-    hog.setSVMDetector(HOGDescriptor::getDefaultPeopleDetector());
-    namedWindow("people detector", 1);
+    std::string src = parser.get<std::string>("frame");
+    std::vector<std::string> frames;
+    cv::glob(parser.get<std::string>("frame"), frames);
+    std::cout << "collected " << src << " " << frames.size() << " frames." << std::endl;
 
-    for(;;)
+    for (int i = 0; i < (int)frames.size(); ++i)
     {
-        char* filename = _filename;
-        if(f)
+        std::string& frame_sourse = frames[i];
+        cv::Mat frame = cv::imread(frame_sourse);
+
+        if(frame.empty())
         {
-            if(!fgets(filename, (int)sizeof(_filename)-2, f))
-                break;
-            //while(*filename && isspace(*filename))
-            //  ++filename;
-            if(filename[0] == '#')
-                continue;
-            int l = (int)strlen(filename);
-            while(l > 0 && isspace(filename[l-1]))
-                --l;
-            filename[l] = '\0';
-            img = imread(filename);
-        }
-        printf("%s:\n", filename);
-        if(!img.data)
+            std::cout << "Frame source " << frame_sourse << " can't be opened." << std::endl << std::flush;
             continue;
+        }
+
+        std::ofstream myfile;
+        if (wf)
+            myfile.open((frame_sourse.replace(frame_sourse.end() - 3, frame_sourse.end(), "txt")).c_str(), std::ios::out);
+
+        ////
+        if (useHOG)
+        {
+            std::vector<cv::Rect> found, found_filtered;
+            // run the detector with default parameters. to get a higher hit-rate
+            // (and more false alarms, respectively), decrease the hitThreshold and
+            // groupThreshold (set groupThreshold to 0 to turn off the grouping completely).
+            hog.detectMultiScale(frame, found, 0, cv::Size(8,8), cv::Size(32,32), 1.05, 2);
+
+            filter_rects(found, found_filtered);
+            std::cout << "collected: " << (int)found_filtered.size() << " detections." << std::endl;
+
+            for (size_t ff = 0; ff < found_filtered.size(); ++ff)
+            {
+                cv::Rect r = found_filtered[ff];
+                cv::rectangle(frame, r.tl(), r.br(), cv::Scalar(0,255,0), 3);
 
-        fflush(stdout);
-        vector<Rect> found, found_filtered;
-        double t = (double)getTickCount();
-        // run the detector with default parameters. to get a higher hit-rate
-        // (and more false alarms, respectively), decrease the hitThreshold and
-        // groupThreshold (set groupThreshold to 0 to turn off the grouping completely).
-        hog.detectMultiScale(img, found, 0, Size(8,8), Size(32,32), 1.05, 2);
-        t = (double)getTickCount() - t;
-        printf("tdetection time = %gms\n", t*1000./cv::getTickFrequency());
-        size_t i, j;
-        for( i = 0; i < found.size(); i++ )
+                if (wf) myfile << r.x << "," << r.y << "," << r.width << "," << r.height << "," << 0.f << "\n";
+            }
+        }
+        else
         {
-            Rect r = found[i];
-            for( j = 0; j < found.size(); j++ )
-                if( j != i && (r & found[j]) == r)
-                    break;
-            if( j == found.size() )
-                found_filtered.push_back(r);
+            std::vector<cv::softcascade::Detection> objects;
+            cascade.detect(frame,  cv::noArray(), objects);
+            std::cout << "collected: " << (int)objects.size() << " detections." << std::endl;
+
+            for (int obj = 0; obj  < (int)objects.size(); ++obj)
+            {
+                cv::softcascade::Detection d = objects[obj];
+
+                if(d.confidence > thr)
+                {
+                    float b = d.confidence * 1.5f;
+
+                    std::stringstream conf(std::stringstream::in | std::stringstream::out);
+                    conf << d.confidence;
+
+                    cv::rectangle(frame, cv::Rect(d.bb.x, d.bb.y, d.bb.width, d.bb.height), cv::Scalar(b, 0, 255 - b, 255), 2);
+                    cv::putText(frame, conf.str() , cv::Point(d.bb.x + 10, d.bb.y - 5),1, 1.1, cv::Scalar(25, 133, 255, 0), 1, CV_AA);
+
+                    if (wf)
+                        myfile << d.bb.x     << "," <<  d.bb.y      << ","
+                               << d.bb.width << "," <<  d.bb.height << "," << d.confidence << "\n";
+                }
+            }
         }
-        for( i = 0; i < found_filtered.size(); i++ )
+
+        if (wi) cv::imwrite(frame_sourse + ".dt.png", frame);
+        if (wf) myfile.close();
+
+        if (si)
         {
-            Rect r = found_filtered[i];
-            // the HOG detector returns slightly larger rectangles than the real objects.
-            // so we slightly shrink the rectangles to get a nicer output.
-            r.x += cvRound(r.width*0.1);
-            r.width = cvRound(r.width*0.8);
-            r.y += cvRound(r.height*0.07);
-            r.height = cvRound(r.height*0.8);
-            rectangle(img, r.tl(), r.br(), cv::Scalar(0,255,0), 3);
+            cv::imshow("pedestrian detector", frame);
+            cv::waitKey(10);
         }
-        imshow("people detector", img);
-        int c = waitKey(0) & 255;
-        if( c == 'q' || c == 'Q' || !f)
-            break;
     }
-    if(f)
-        fclose(f);
+
+    if (si) cv::waitKey(0);
     return 0;
 }
+
+void filter_rects(const std::vector<cv::Rect>& candidates, std::vector<cv::Rect>& objects)
+{
+    size_t i, j;
+    for (i = 0; i < candidates.size(); ++i)
+    {
+        cv::Rect r = candidates[i];
+
+        for (j = 0; j < candidates.size(); ++j)
+            if (j != i && (r & candidates[j]) == r)
+                break;
+
+        if (j == candidates.size())
+            objects.push_back(r);
+    }
+}