Created
May 4, 2016 19:53
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Count stars on a photo using python
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| import numpy as np | |
| import pylab | |
| import mahotas as mh | |
| from skimage import measure | |
| sky=mh.imread('sky.jpeg') | |
| pylab.imshow(sky) | |
| t=mh.thresholding.otsu(sky.astype('uint8')) | |
| labeled,stars=mh.label(sky>t) | |
| print stars | |
| pylab.imshow(labeled) | |
| pylab.jet() | |
| pylab.show() |
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It has been a long time, I don't remember line by line, but what it does this; it reads the image in terms of colour density,then based on a threshold you would define, it will count the areas which are brighter than the rest of image, so every dot in your image depending on the threshold in terms of size will be counted.