Merge pull request #6305 from rishirajsurti:master

2016-04-14 08:42:39 +00:00
parent ed508dc8ed 4a9170ba42
commit fc5e32c7ac
5 changed files with 166 additions and 0 deletions
--- a/samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp
+++ b/samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp
@@ -0,0 +1,102 @@
+#include "opencv2/imgproc.hpp"
+#include "opencv2/highgui.hpp"
+
+#include <iostream>
+#include <stdlib.h>
+
+using namespace std;
+using namespace cv;
+
+/** Function Headers */
+void on_low_r_thresh_trackbar(int, void *);
+void on_high_r_thresh_trackbar(int, void *);
+void on_low_g_thresh_trackbar(int, void *);
+void on_high_g_thresh_trackbar(int, void *);
+void on_low_b_thresh_trackbar(int, void *);
+void on_high_b_thresh_trackbar(int, void *);
+
+/** Global Variables */
+int low_r=30, low_g=30, low_b=30;
+int high_r=100, high_g=100, high_b=100;
+
+/** @function main */
+int main()
+{
+    //! [mat]
+    Mat frame, frame_threshold;
+    //! [mat]
+    //! [cap]
+    VideoCapture cap(0);
+    //! [cap]
+    //! [window]
+    namedWindow("Video Capture", WINDOW_NORMAL);
+    namedWindow("Object Detection", WINDOW_NORMAL);
+    //! [window]
+    //! [trackbar]
+    //-- Trackbars to set thresholds for RGB values
+    createTrackbar("Low R","Object Detection", &low_r, 255, on_low_r_thresh_trackbar);
+    createTrackbar("High R","Object Detection", &high_r, 255, on_high_r_thresh_trackbar);
+    createTrackbar("Low G","Object Detection", &low_g, 255, on_low_g_thresh_trackbar);
+    createTrackbar("High G","Object Detection", &high_g, 255, on_high_g_thresh_trackbar);
+    createTrackbar("Low B","Object Detection", &low_b, 255, on_low_b_thresh_trackbar);
+    createTrackbar("High B","Object Detection", &high_b, 255, on_high_b_thresh_trackbar);
+    //! [trackbar]
+    while(char(waitKey(1))!='q'){
+        //! [while]
+        cap>>frame;
+        if(frame.empty())
+            break;
+        //-- Detect the object based on RGB Range Values
+        inRange(frame,Scalar(low_b,low_g,low_r), Scalar(high_b,high_g,high_r),frame_threshold);
+        //! [while]
+        //! [show]
+        //-- Show the frames
+        imshow("Video Capture",frame);
+        imshow("Object Detection",frame_threshold);
+        //! [show]
+    }
+    return 0;
+}
+//! [low]
+/** @function on_low_r_thresh_trackbar */
+void on_low_r_thresh_trackbar(int, void *)
+{
+    low_r = min(high_r-1, low_r);
+    setTrackbarPos("Low R","Object Detection", low_r);
+}
+//! [low]
+//! [high]
+/** @function on_high_r_thresh_trackbar */
+void on_high_r_thresh_trackbar(int, void *)
+{
+    high_r = max(high_r, low_r+1);
+    setTrackbarPos("High R", "Object Detection", high_r);
+}
+//![high]
+/** @function on_low_g_thresh_trackbar */
+void on_low_g_thresh_trackbar(int, void *)
+{
+    low_g = min(high_g-1, low_g);
+    setTrackbarPos("Low G","Object Detection", low_g);
+}
+
+/** @function on_high_g_thresh_trackbar */
+void on_high_g_thresh_trackbar(int, void *)
+{
+    high_g = max(high_g, low_g+1);
+    setTrackbarPos("High G", "Object Detection", high_g);
+}
+
+/** @function on_low_b_thresh_trackbar */
+void on_low_b_thresh_trackbar(int, void *)
+{
+    low_b= min(high_b-1, low_b);
+    setTrackbarPos("Low B","Object Detection", low_b);
+}
+
+/** @function on_high_b_thresh_trackbar */
+void on_high_b_thresh_trackbar(int, void *)
+{
+    high_b = max(high_b, low_b+1);
+    setTrackbarPos("High B", "Object Detection", high_b);
+}