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I need to detect a symbol in an image. The symbol can be of my design, with the only requirement is that it be printable on a regular sheet of paper.

What type of features does Haar pick up best? Should I be using high contrast lines (black/white) or should there be a gradient? Are curved lines better than straight ones?

Jake
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  • What else is on the page? Can your symbol be colour? Why do you think you need a Haar cascade? – Mark Setchell Apr 24 '17 at 21:30
  • * Its a picture of a granite slab, with some other things in the background (mostly a wall). *It can be color. *I am doing this in python/opencv. I looked for how to train for object detection, and Haar is what I found. I am locked into opencv, but not Haar. – Jake Apr 25 '17 at 12:18
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    This may help... http://stackoverflow.com/q/43404255/2836621 – Mark Setchell Apr 25 '17 at 12:22

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