python - Grid Detection with Scipy -

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i want identify points in image arranged in regular 4 x 5 grid:

raw image

with dynamic thresholding , opening , closing, have labeled image:

labelled image

extracting centroids gives me set of points. want fit 4 x 5 grid image, , transform image make grid square , flat.

can suggest how might go this? looked @ hough transform that's lines rather points.

any suggestions appreciated.


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