Object detection in drawing

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Hello,

I have the following requirement. In an image drawing (usually jpg format) there may exist certain similar "objects" eg chairs. I would like to "pick" one eg. by enclosing it in a rectangle, and look for all same ones in the drawing. Not all same objetcs are in same direction.

I wonder if OpenCV could help with that problem. If yes, are there any examples? I work in C#.

Thank you

Yannis