Symbol Recognition

[cschle]

Hello,

i search an algorithm for recognition symbols in images (made by cam).

The symbols are very easy, like circle, rectangel, hearth, or simple characters, numbers. But only 1 max. 2 symbols must be recognited.

Preferred code for c#, visual basic, java.

Important is, that the alignment of the image is free. Any angle was possible. It don't must recognize colored images. b/w is enough.

Thanks for any help,

Carsten



ps: if you know a german tutorial i forever thankful ;-)

[Russco]

You could start here.

[BioPhysEngr]

Might want to look into Viola-Jones image detection or Google around for Haar-like feature detection. You might also look at the OpenCV library (link); I've used it before and it's a solid library.

You will probably have to address orientation in a somewhat more complex way. I am not an expert on this subject, but I was taken to understand that many computer vision methods are very sensitive to differences in orientation. This may be a subject of ongoing research, so you might check out Google scholar for some idea.

Hope that helps point you in the right direction. Let us know if that was helpful and what you end up doing!

[BioPhysEngr]

re: Viola-Jones: here is the original paper: http://research.microsoft.com/en-us/...Jones_IJCV.pdf

I think you should find it relevant to your problem (and otherwise a good read!).