How to convert edge curve to a list of points

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I have an Image and I am applying an edge detection algorithm (Canny) to it.

I get the edges in image but for my work I need to get the detected edges as a list of points, specially the ones that are connected. (list of contours), in order to perform meaningful operations on the detected edges.

If anyone can point me to some relevant algorithm/ paper/ method, i ll be very thankful.
If u can suggest some relevant function in OpenCV, that would be big help also.

Posted 9-Oct-15 17:40pm

Abhishrek

Updated 9-Oct-15 21:14pm

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Patrice T 10-Oct-15 13:54pm

You should dig in your library, because your curves are probably made from a list of points.

Abhishrek 25-Oct-15 4:16am

I am using OpenCV Canny edge detector. it doesn't give any quantitative information. only detected edges become available on the ouput image.

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BillWoodruff · Accepted Answer · 2015-10-09T22:28:00

Solution 1

There are resources here on CodeProject for:

1. Discriminating contours (shapes) which is what I think you are after : [^].

2. several articles on edge-detection using Canny, Susan, Prewitt: [^]

Posted 9-Oct-15 22:28pm

BillWoodruff

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Abhishrek 25-Oct-15 4:21am

@BillWoodruff, thanks for the resources. It helped much. I had to do some dialation and smoothing etc and then findContour() to get the edges as contours. Now i can proceed for some meaningful analysis of them. Thanks again.