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2014-03-23 10:23:16 -0600 received badge  Supporter (source)
2013-10-25 20:17:20 -0600 answered a question Multiple simultaneous logo/target recognition/reporting

Option A: train cascades for each logo. Then use object detection. Option B: use 2d features keypoints and descriptors, then find using matching (Flan or brute force)

Extraction and emailing is on you after that.

2013-10-25 20:10:46 -0600 received badge  Editor (source)
2013-10-25 20:09:45 -0600 answered a question opencv_traincascade training time/stuck

When I tried to train with a buffer that large train took 8GB+ ram. When its needs exceeded my available ram the whole process slowed way down. I assume it started using my hdd as memory overflow. Try 512mb. Also monitor your CPU and ram usage. What is it at when it seems to hang.

2013-10-25 20:03:27 -0600 answered a question How does number of training stage affect the performance of cascade file?

With 30 stages you might have over trained your classifier. I'm running into a similar problem. Did you crop positives from the video you are testing with? Finding the perfect parameters for cascade training is the key. For my project I have a trial journal where I note all parameters and the result. Trial and error takes a long time when training takes a few hours.