Find location of plotted circle on a binary image
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have to findthe location of the circle, need to walk along the circle and get the pixel value. For example the answer will be almost like 000011111000001111.. when the circle pass through the white region shows "1" and if it pass through black region shows "0".
4 Comments
Nir Rattner
on 5 Aug 2014
The circle in the provided image appears to be computer generated. What function are you using to draw the circle? It is likely that you can pull the XData and YData from the circle object to get pixel values.
Answers (1)
Image Analyst
on 5 Aug 2014
Edited: Image Analyst
on 5 Aug 2014
for k = 1 : length(circleX)
row = circleY(k);
column = circleX(k);
pixelValue = binaryImage(row, column)
end
Is that what you want?
3 Comments
Nir Rattner
on 6 Aug 2014
Note that this may double count some pixels depending on the resolution and rounding of your adjusted_theta vector. You may first want to do:
uniqueXY = unique([x' y'], 'rows');
xUnique = uniqueXY(:, 1);
yUnique = uniqueXY(:, 2);
And then you can use xUnique and yUnique in the loop suggested above.
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