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Adelson checkerboard illusion

I went through this post which tries to implement the illusion in OpenCV.

Processing images causing optical illusions

I am unable to reproduce the result posted on the link. Am I missing some part of the code here? As it has been mentioned that this is a small fragment of python code they tested.

Looking for some guidance.

I am currently counting of this illusion to help me extract edges.

Adelson checkerboard illusion

I went through this post which tries to implement the illusion in OpenCV.

Processing images causing optical illusions

I am unable to reproduce the result posted on the link. Am I missing some part of the code here? As it has been mentioned that this is a small fragment of python code they tested.

Looking for some guidance.

I am currently counting of this illusion to help me extract edges.

Example picture:

Extraction of edge of this single potato

Potatoes

I tried to extract the edges

Edge detection

At the bottom of the original potato image you can see, we can clearly trace out the edge from our eye. When edge detection is applied it can't even be detected at a narrow threshold at lower limit.

lower limit of threshold

Any suggestions on how to detect the edge being missed by the edge detector?

Adelson checkerboard illusion

I went through this post which tries to implement the illusion in OpenCV.

Processing images causing optical illusions

I am unable to reproduce the result posted on the link. Am I missing some part of the code here? As it has been mentioned that this is a small fragment of python code they tested.

Looking for some guidance.

I am currently counting of this illusion to help me extract edges.

Example picture:

Extraction of edge of this single potato

Potatoes

I tried to extract the edges

Edge detection

At the bottom of the original potato image you can see, we can clearly trace out the edge from our eye. When edge detection is applied it can't even be detected at a narrow threshold at lower limit.

lower limit of threshold

Any suggestions on how to detect the edge being missed by the edge detector?