second derivative of an image

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jan on 9 May 2014
Commented: Image Analyst on 11 May 2014
Hi every body
The contour of an object in one image is known as the points with second derivative equal to zero. How can i get this characteristic knowing that I have only the image (the pixels intensity)??
Please can any one help me, thanks a lot

Answers (1)

Nitin on 10 May 2014
There is a nice explanation on image derivative here . Please check it out, slide 23 onwards.
Image Analyst
Image Analyst on 11 May 2014
Why don't you post your image to help with your explanation about what you want to measure in the image?

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