using namespace cv;
using namespace std;
-void help(char** av) {
- cout << "The program captures frames from a video file, image sequence (01.jpg, 02.jpg ... 10.jpg) or camera connected to your computer." << endl
- << "Usage:\n" << av[0] << " <video file, image sequence or device number>" << endl
- << "q,Q,esc -- quit" << endl
- << "space -- save frame" << endl << endl
- << "\tTo capture from a camera pass the device number. To find the device number, try ls /dev/video*" << endl
- << "\texample: " << av[0] << " 0" << endl
- << "\tYou may also pass a video file instead of a device number" << endl
- << "\texample: " << av[0] << " video.avi" << endl
- << "\tYou can also pass the path to an image sequence and OpenCV will treat the sequence just like a video." << endl
- << "\texample: " << av[0] << " right%%02d.jpg" << endl;
-}
+//hide the local functions in an anon namespace
+namespace {
+ void help(char** av) {
+ cout << "The program captures frames from a video file, image sequence (01.jpg, 02.jpg ... 10.jpg) or camera connected to your computer." << endl
+ << "Usage:\n" << av[0] << " <video file, image sequence or device number>" << endl
+ << "q,Q,esc -- quit" << endl
+ << "space -- save frame" << endl << endl
+ << "\tTo capture from a camera pass the device number. To find the device number, try ls /dev/video*" << endl
+ << "\texample: " << av[0] << " 0" << endl
+ << "\tYou may also pass a video file instead of a device number" << endl
+ << "\texample: " << av[0] << " video.avi" << endl
+ << "\tYou can also pass the path to an image sequence and OpenCV will treat the sequence just like a video." << endl
+ << "\texample: " << av[0] << " right%%02d.jpg" << endl;
+ }
-int process(VideoCapture& capture) {
- int n = 0;
- char filename[200];
- string window_name = "video | q or esc to quit";
- cout << "press space to save a picture. q or esc to quit" << endl;
- namedWindow(window_name, WINDOW_KEEPRATIO); //resizable window;
- Mat frame;
-
- for (;;) {
- capture >> frame;
- if (frame.empty())
- break;
-
- imshow(window_name, frame);
- char key = (char)waitKey(30); //delay N millis, usually long enough to display and capture input
+ int process(VideoCapture& capture) {
+ int n = 0;
+ char filename[200];
+ string window_name = "video | q or esc to quit";
+ cout << "press space to save a picture. q or esc to quit" << endl;
+ namedWindow(window_name, WINDOW_KEEPRATIO); //resizable window;
+ Mat frame;
- switch (key) {
- case 'q':
- case 'Q':
- case 27: //escape key
- return 0;
- case ' ': //Save an image
- sprintf(filename,"filename%.3d.jpg",n++);
- imwrite(filename,frame);
- cout << "Saved " << filename << endl;
- break;
- default:
- break;
+ for (;;) {
+ capture >> frame;
+ if (frame.empty())
+ break;
+
+ imshow(window_name, frame);
+ char key = (char)waitKey(30); //delay N millis, usually long enough to display and capture input
+
+ switch (key) {
+ case 'q':
+ case 'Q':
+ case 27: //escape key
+ return 0;
+ case ' ': //Save an image
+ sprintf(filename,"filename%.3d.jpg",n++);
+ imwrite(filename,frame);
+ cout << "Saved " << filename << endl;
+ break;
+ default:
+ break;
+ }
}
+ return 0;
}
- return 0;
}
int main(int ac, char** av) {