How to detect shapes with the help of contours in matlab?

20 Jan. 2013
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We have to detect an image of arrow in matlab, so how can we proceed to detect it , and if any other suitable method please suggest..!!

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Image Analyst
Image Analyst am 20 Jan. 2013

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Are the arrows always the same shape? Are they always the same size? Are they always the same angle? If so, use nromxcorr2(). Otherwise search VisionBib for pattern recognition papers and code one up. Even OCR methods would work for an arrow.

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Anunay
Anunay am 20 Jan. 2013
shape&length is same but angle is not same. we have to move our robot in direction of arrow
Image Analyst
Image Analyst am 20 Jan. 2013
Perhaps you should try the Computer Vision System Toolbox. I think it has SURF or SIFT or other methods for doing things like that. Are you going to show us your image? (Try http://snag.gy)
Anunay
Anunay am 20 Jan. 2013
Bearbeitet: Walter Roberson am 21 Jan. 2013
http://snag.gy/76Vuq.jpg is an arrow image .how to approch it .please help

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Anunay
Anunay
am 20 Jan. 2013

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