'Edge detection on Semiconductor wafer- die Python- light colored lines
The wafer map image looks like this
Each square shown here is the die. I want to detect the edges of all the dies and each die has a light-colored horizontal line that splits it into two halves. (that line is extremely light in color) And here I'm attaching a closer overview of 8 such squares(these are straight parallel lines :) looks irregular because I did some patchwork and drew this)
I want to detect all the external edges of these lines and draw an overlay on top of the original wafer map.
This is an example of the result desired on 4 such squares (i.e.Dies)
Do this for the entire wafer map image which is a 2000*2000 pixel large image.
I already tried using open cv and pillow image enhancements to sharpen the image so that the lines are visible more. Also used some edge detection but didn't work well. Open to any suggestions to do something similar.
Also while doing edge detection, the lines are broken. Please suggest a good morphology structuring element that can fix this issue. If you can answer any part of the question, will be much appreciated.
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