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2013-06-04 11:46:39 -0600 commented answer How to find photo inside image

Thanks. This tutorial looks great. The problem is that in the tutorial Canny detector provides very clean edges. While in my case (second image) I have lots of noise. That's probably because the quality of my image is lower. Is there a way to improve quality of image to get better edges?

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2013-06-04 10:25:55 -0600 commented answer How to find photo inside image

Thanks for the pointers. I will take all the tutorials. Regarding my task. Ben is correct. I don't know what kind of photo is on the image (and I don't know the background). So I'm looking for generic solution.

2013-06-04 10:22:56 -0600 commented question How to find photo inside image

I have same images with single (internal) photo. The photos inside images are different and they are on different background. But there is only single photo on every image. I want to crop the image to the internal photo.

2013-06-04 07:52:15 -0600 asked a question How to find photo inside image

I would like to find photo inside image. Below is an example:

Original image

I suppose that first I need to find edges. So I tried 2 approaches: Edge Canny detector:

Canny detector

Adaptive Threshold (with Gaussian smoothing):

Adaptive threshold

As you can see the edges are not perfect. Any ideas how to improve edge detection. Or maybe there is a way to find photo from Canny detector in second image?

Thank you for any tips in advance.