how to recognize the kind of object we intrest in picture

this is a picture of a dog's contour and a horse's contour alt text http://www.tlnews.cn/forum/attachments/month_0810/20081024_2f055de790b83aced18atjm8EVN4Gyay.jpg

how to make computer know it is a horse or a dog or a person. alt text http://www.pocketgo.com.cn/upload/2008-10/开发者_如何学运维122465306490637600.jpg

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this will help http://people.csail.mit.edu/celiu/pdfs/SIFTflow.pdf

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That's a difficult question.

You should research computer vision.

I would think the method would be something like:

• Find edges (just image processsing)
• Trace shapes (not sure how to go about doing that)
• Pass to neural network for classification.

Of course, designing and training the network is not exactly a simple operation..