added example_15-01.cpp and test.avi and tree.avi

CMakeLists.txt

@@ -33,7 +33,6 @@ add_executable( example_09-03 example_09-03.cpp )
 add_executable( example_10-01 example_10-01.cpp )
 add_executable( example_10-02 example_10-02.cpp )
 add_executable( example_10-03 example_10-03.cpp )
-#...
 add_executable( example_11-01 example_11-01.cpp )
 add_executable( example_11-02 example_11-02.cpp )
 add_executable( example_11-03 example_11-03.cpp )
@@ -46,6 +45,8 @@ add_executable( example_14-01 example_14-01.cpp )
 add_executable( example_14-02 example_14-02.cpp )
 add_executable( example_14-03 example_14-03.cpp )
 add_executable( example_14-04 example_14-04.cpp )
+add_executable( example_15-01 example_15-01.cpp )
+#...
 add_executable( example_16-01 example_16-01.cpp )
 
 target_link_libraries( example_02-01 ${OpenCV_LIBS} )
@@ -76,7 +77,6 @@ target_link_libraries( example_09-03 ${OpenCV_LIBS} )
 target_link_libraries( example_10-01 ${OpenCV_LIBS} )
 target_link_libraries( example_10-02 ${OpenCV_LIBS} )
 target_link_libraries( example_10-03 ${OpenCV_LIBS} )
-# ...
 target_link_libraries( example_11-01 ${OpenCV_LIBS} )
 target_link_libraries( example_11-02 ${OpenCV_LIBS} )
 target_link_libraries( example_11-03 ${OpenCV_LIBS} )
@@ -89,4 +89,6 @@ target_link_libraries( example_14-01 ${OpenCV_LIBS} )
 target_link_libraries( example_14-02 ${OpenCV_LIBS} )
 target_link_libraries( example_14-03 ${OpenCV_LIBS} )
 target_link_libraries( example_14-04 ${OpenCV_LIBS} )
+target_link_libraries( example_15-01 ${OpenCV_LIBS} )
+#...
 target_link_libraries( example_16-01 ${OpenCV_LIBS} )

example_15-01.cpp

@@ -0,0 +1,66 @@
+//Example 15-1. Reading out the RGB values of all pixels in one row of a video and
+// accumulating those values into three separate comma separated files
+//
+#include <opencv2/opencv.hpp>
+#include <iostream>
+#include <fstream>
+
+using namespace std;
+
+void help(char** argv ) {
+	cout << "\n"
+		<< "Read out RGB pixel values and store them to disk\nCall:\n"
+		<< argv[0] <<" avi_file\n"
+		<< "\n This will store to files blines.csv, glines.csv and rlines.csv\n\n"
+		<< endl;
+}
+
+int main( int argc, char** argv) {
+	// Argument handling
+	//
+	if(argc != 2) { help(argv); return -1; }
+	cv::namedWindow( argv[0], CV_WINDOW_AUTOSIZE );
+	cv::VideoCapture cap;
+	if((argc < 2)|| !cap.open(argv[1]))
+	{
+		cerr << "Couldn't open video file" << endl;
+		help(argv);
+		cap.open(0);
+		return -1;
+	}
+
+	//Prepare Output
+	//
+	cv::Point pt1(10,10), pt2(30,30);
+	int max_buffer;
+	cv::Mat rawImage;
+	ofstream b,g,r;
+	b.open("blines.csv");
+	g.open("glines.csv");
+	r.open("rlines.csv");
+
+	// MAIN PROCESSING LOOP:
+	//
+	for(;;) {
+		cap >> rawImage;
+		if( !rawImage.data ) break;
+		cv::LineIterator it( rawImage, pt1, pt2, 8);
+		for( int j=0; j<it.count; ++j,++it ) {
+			b << (int)(*it)[0] << ", ";
+			g << (int)(*it)[1] << ", ";
+			r << (int)(*it)[2] << ", ";
+			(*it)[2] = 255;   // Mark this sample in red
+		}
+		cv::imshow( argv[0], rawImage );
+		int c = cv::waitKey(10);
+		b << "\n"; g << "\n"; r << "\n";
+	}
+
+	// CLEAN UP:
+	//
+	b << endl; g << endl; r << endl;
+	b.close(); g.close(); r.close();
+	cout << "\n"
+		<< "Data stored to files: blines.csv, glines.csv and rlines.csv\n\n"
+		<< endl;
+}