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how to plot a histogram with "Image Row" & "Number of edges in each row"?

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Behrad kiani
Behrad kiani 2013-11-8
回答： Image Analyst 2013-11-8
I am using Sobel method to find vertical Edge of an image. after that I need a histogram that show me "Image Row" in Horizon Axis & show me "Number of edges in each row" in horizon axis. how to do it? the attached image is the histogram that I want(that is for understanding the problem)
this is the picture that I want to extract from it

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Image Analyst
Image Analyst 2013-11-8
You have to define what intensity in the edge detection image constitutes an edge. Maybe it's 20, or 5 or 40 or whatever. The lower the number, the more and bigger edges you will be defining. Let's say that you're going to say if the edge image is more than 10, it's an edge. Then to create the image you showed, you just do
binaryImage = edgeImage > 10;
imshow(binaryImage);

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