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    <p>Well, using OpenCV you would of taking a frame of a video file and do any computations on it.</p> <p>You can do several different methods of detecting a character on that image, but it's not so easy to have it as flexible so you can even get that person if it's lying on the floor for example, if you only entered reference images of that character standing.</p> <p>Basically you could try extracting all important features from your set of reference pictures and have a (in your case supervised) learning algorithm that gets a good feature-vector of that character for classification.</p> <p>You then need to write your code that plays the video and which takes a video frame let's say each 500ms (or other as you desire), gets a segmentation of the object you thing would be that character and compare it with the reference values you get from your learning algorithm. If there's a match, your code can yell "Yehaaawww!" or do other things...</p> <p>But all this depends on how flexible you want this to be. You could also try a template match or cross-correlation which basically shifts the reference image(s) over the frame and checks how equal both parts are. But this unfortunately is very sensitive for rotation, deformations or other noise... so you wouldn't get that person if its i.e. laying down. And I doubt you can get all those calculations done in realtime...</p> <p>Basically: Yes OpenCV is good to use for your image processing/computer vision tasks. But it offers a lot of methods and ways and you'd need to find a way that works for your images... it's not a trivial task though...</p> <p>Hope that helps...</p>
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    1. POGUI version of OpenCV for feature-detection (SIFT etc.) prototyping before actual project development?
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    1. COSo I cannot test whether my screenshots are actually applicable for the task? Is there no other software that could perform these tests for me, before I start creating such a time investing application?
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    2. COWell you could upload one or two example frames of your videos so we can see what it looks like and whether it would be a hard task to extract the important features of the characters... You're probably not going to find a ready software that does that for you... anyway it's going to be a time-consuming task, all we can do is help you get there... ;-)
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