from PIL import Image import numpy as np from scipy.ndimage.filters import maximum_filter import pylab # the picture (256 * 256 pixels) contains bright spots of which I wanna get positions # problem: data has high background around value 900 - 1000 im = Image.open('slice0000.png') data = np.array(im) # as far as I understand, data == maximum_filter gives True-value for pixels # being the brightest in their neighborhood (here 10 * 10 pixels) maxima = (data == maximum_filter(data,10)) # How can I get only maxima, outstanding the background a certain value, let's say 500 ? I'm afraid I don't really understand the scipy.ndimage.filters.maximum_filter() function. Is there a way to obtain pixel-coordinates only within the spots and not within the background? https://i.sstatic.net/RImHW.png (16-bit grayscale picture, 256*256 pixels) Continue reading...
