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I have a scanned document image as below :

Example of a scanned document

I need to crop the document from the image.Can anyone tell me how to do with OpenCV .

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  • Take a look at this blog post. Commented Dec 11, 2015 at 11:17

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In very clear samples like the one you provided:

  1. To Gray
  2. Canny
  3. FindContours
  4. Find biggest contour

However, this method will not work for 99% of samples. If you have more samples, add them to your post please.

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