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Contours detection on canvas

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@Marco_Buetikofer wrote:

Hello All,

I’m wondering what is the fastest and/or more stable way of doing openCV contours detection on the canvas (maybe on FBO?).
For clarity’s sake, let’s say I’m drawing a few rectangles on the canvas and I want openCV to track them (I know it sound stupid, but there is a reason for wanting this :slight_smile: ). What would be the best way of passing the images on the canvas to opencv?

Thank you all for the help!

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