Get coordinates of edges — Image Processing

Technical Source
2 min readFeb 9, 2023

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I am performing Roberts method for edge detection. But my aim is to get the coordinates of the edges after applying Roberts method or any other method.

Before Roberts method:

After Roberts Method:

Further more i want to calculate the coordinate of these 4 vertices.

Is there is any solution for this problem ?

NOTE:-

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Lets say image_test is the output binary image (After Roberts Method)

data=corner(image_test);
r_data=data(:,1);
c_data=data(:,2);
min_colm=min(c_data);
idx1=find(c_data==min_colm);
ver1=[r_data(idx1(1)),min_colm]
max_colm=max(c_data);
idx2=find(c_data==max_colm);
ver2=[r_data(idx2(1)),max_colm]
min_row=min(r_data);

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Technical Source
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