OpenCV finding picture (frame) in video

Question

I am trying to create small application in C++ that will return probability value (real number from 0 to 1) for recognizing two pictures in video. My idea is to find commercials in certain video material. I was thinking to cut first frame from commercial as well as the last one. In that way I could create app, using OpenCV, that will load a video (TV content) and then it will search for the first frame catted from commercials. If it finds it (with probability more than SOME_PARAMETER) than app can conclude that that commercials starts there. Then I would like to search for the last frame and if it's found (again with probability more than SOME_PARAMETER) than the app can conclude that wanted commercial really exists in given video. This is just an idea. I am expert in C++ but totally newbie with OpenCV. If someone can point me out, or give an example it would be much appreciated. Of course I am open to any suggestions regarding idea. Thanks,

M.

how did you want to find the commercial? scanning images for similarity? — Jona, Mar 25 '13 at 15:38
As for how you could get frame from a video, page 356 of docs.opencv.org/opencv_tutorials.pdf has a simple example of getting each frame and showing it. As for how to detect commercials, you need to search papers. — gongzhitaao, Mar 25 '13 at 16:13
@MilošLjumović, you finally find first and last frame of ads ? — Magesh Pandian, Apr 22 '17 at 15:58
I have at that time. Though I haven't opened that project for a long time. Do you need advice or smth? — Milos Ljumovic, Apr 26 '17 at 12:56
yes , i am work on same functionality, can you share your advice ? — Magesh Pandian, May 05 '17 at 12:08

score 14 · Answer 1 · edited May 23 '17 at 12:10

What you are looking for is known as template matching in OpenCV.

To get acquainted with OpenCV you should start reading some tutorials, besides the books there are some good ones on the web. As a C++ guy, you will probably use the C++ interface of OpenCV which uses cv::Mat as the main data structure to represent images. If you see the IplImage data type being used, know it's from the C interface.

After the preliminaries, you will eventually need to learn how to read frames from a video:

and then how to process those frames, individually:

Finally, you will investigate how template matching works:

There are other ways to track objects besides template matching, check these references:

Thanks @karlphillip I will try to work something out. Thanks. — Milos Ljumovic, Mar 26 '13 at 20:52
@MageshPandian Thank you. Unfortunately, the last link could not be found anywhere else so I replaced it with more updated stuff. — karlphillip, Apr 22 '17 at 20:04

OpenCV finding picture (frame) in video

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