Matching a rotated bitmap to a collage image

Posted by Dmi on Stack Overflow See other posts from Stack Overflow or by Dmi
Published on 2010-04-26T02:25:23Z Indexed on 2010/04/26 2:33 UTC
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bitmap

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pattern-matching

Hi,

My problem is that I have an image of a detailed street map. On this map, there can be a certain small image of a sign (such as a traffic light icon) rotated at any angle, maybe resized. I have this small image in a bitmap. Is there any algorithm or technique by which I can locate this bitmap if a copy of it exists, rotated and maybe resized, in the large collage image?

This is similar to the problem with Augmented Reality and locating the marker image, but mine is only 2D with no perspective distortion.

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