Update to 2.0.0 tree from current Fremantle build

[opencv] / samples / c / peopledetect.cpp

diff --git a/samples/c/peopledetect.cpp b/samples/c/peopledetect.cpp
new file mode 100644 (file)
index 0000000..6a1bacb
--- /dev/null
+++ b/samples/c/peopledetect.cpp
@@ -0,0 +1,44 @@
+#include "cvaux.h"
+#include "highgui.h"
+
+int main(int argc, char** argv)
+{
+    cv::Mat img;
+
+    if( argc > 1 )
+        img = cv::imread(argv[1]);
+
+    if( !img.data )
+    {
+        fprintf( stderr, argc == 1 ? "ERROR: no image was specified\n" :
+            "ERROR: the specified image could not be loaded\n");
+        fprintf( stderr, "Usage: peopledetect <inputimage>\n" );
+        return -1;
+    }
+
+    cv::HOGDescriptor hog;
+    hog.setSVMDetector(cv::HOGDescriptor::getDefaultPeopleDetector());
+    cv::vector<cv::Rect> found;
+    double t = (double)cv::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, cv::Size(8,8), cv::Size(24,16), 1.05, 2);
+    t = (double)cv::getTickCount() - t;
+    printf("Detection time = %gms\n", t*1000./cv::getTickFrequency());
+    for( int i = 0; i < (int)found.size(); i++ )
+    {
+        cv::Rect r = found[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.y += cvRound(r.height*0.1);
+        r.width = cvRound(r.width*0.8);
+        r.height = cvRound(r.height*0.8);
+        cv::rectangle(img, r.tl(), r.br(), cv::Scalar(0,255,0), 1);
+    }
+    cv::namedWindow("people detector", 1);
+    cv::imshow("people detector", img);
+    cv::waitKey(0);
+    return 0;
+}