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#!/usr/bin/env python
'''
K-means clusterization sample.
Usage:
kmeans.py
Keyboard shortcuts:
ESC - exit
space - generate new distribution
'''
# Python 2/3 compatibility
from __future__ import print_function
import numpy as np
import cv2 as cv
from gaussian_mix import make_gaussians
def main():
cluster_n = 5
img_size = 512
# generating bright palette
colors = np.zeros((1, cluster_n, 3), np.uint8)
colors[0,:] = 255
colors[0,:,0] = np.arange(0, 180, 180.0/cluster_n)
colors = cv.cvtColor(colors, cv.COLOR_HSV2BGR)[0]
while True:
print('sampling distributions...')
points, _ = make_gaussians(cluster_n, img_size)
term_crit = (cv.TERM_CRITERIA_EPS, 30, 0.1)
_ret, labels, _centers = cv.kmeans(points, cluster_n, None, term_crit, 10, 0)
img = np.zeros((img_size, img_size, 3), np.uint8)
for (x, y), label in zip(np.int32(points), labels.ravel()):
c = list(map(int, colors[label]))
cv.circle(img, (x, y), 1, c, -1)
cv.imshow('kmeans', img)
ch = cv.waitKey(0)
if ch == 27:
break
print('Done')
if __name__ == '__main__':
print(__doc__)
main()
cv.destroyAllWindows()
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