Update mprix and colors

bin/dominant-color.py

@@ -0,0 +1,30 @@
+from __future__ import print_function
+import binascii
+from PIL import Image
+import numpy as np
+import scipy
+import scipy.misc
+import scipy.cluster
+import sys
+
+NUM_CLUSTERS = 5
+
+# print('reading image')
+im = Image.open(sys.argv[1])
+im = im.resize((150, 150))      # optional, to reduce time
+ar = np.asarray(im)
+shape = ar.shape
+ar = ar.reshape(np.product(shape[:2]), shape[2]).astype(float)
+
+# print('finding clusters')
+codes, dist = scipy.cluster.vq.kmeans(ar, NUM_CLUSTERS)
+# print('cluster centres:\n', codes)
+
+vecs, dist = scipy.cluster.vq.vq(ar, codes)         # assign codes
+counts, bins = np.histogram(vecs, len(codes))    # count occurrences
+
+index_max = np.argmax(counts)                    # find most frequent
+peak = codes[index_max]
+colour = binascii.hexlify(bytearray(int(c) for c in peak)).decode('ascii')
+# print('most frequent is %s (#%s)' % (peak, colour))
+print(colour)