Detecting an object on the image based on geometrical form

image-processing pattern-matching computer-vision pattern-recognition
bob27 picture bob27 · Mar 6, 2009 · Viewed 28.6k times · Source

I have a basic understanding in image processing and now studying in-depth the "Digital Image Processing" book by Gonzales.

When image given and object of interest approximated form is known (e.g. circle, triangle), what is the best algorithm / method to find this object on image?

The object can be slightly deformed, so brute force approach will not help.

Answer

geschema picture geschema · May 5, 2009

You may try using Histograms of Oriented Gradients (also called Edge Orientation Histograms). We have used them for detecting road signs. http://en.wikipedia.org/wiki/Histogram_of_oriented_gradients and the papers by Bill Triggs should get you started.

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