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August 29, 2015 14:00
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Function to estimate focus in an image region
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| def estimateFocus(file, s=5): | |
| im = Image.open(file).convert("L") | |
| w,h = im.size | |
| box = (w/2 - 50, h/2 - 50, w/2 + 50, h/2 + 50) | |
| im = im.crop(box) | |
| imf = im.filter(ImageFilter.MedianFilter(s)) | |
| d = ImageChops.subtract(im, imf, 1, 100) | |
| return ImageStat.Stat(d).stddev[0] |
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