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I am also not so experienced in Cascade training, but I think you should use more than 15 stages. When I tried it, I got with 30 stages good results. And I'd take more negative images.

Did you try feature tracking for your logo? I think this could be also a solution. link text

I am also not so experienced in Cascade training, but I think you should use more than 15 stages. When I tried it, I got with 30 stages good results. And I'd take more negative images.

Did you try feature tracking for your logo? I think this could be also a solution. link texthttp://docs.opencv.org/doc/tutorials/features2d/table_of_content_features2d/table_of_content_features2d.html#table-of-content-feature2d