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Convert image file to grayscale array data - 画像ファイルをグレースケール配列に変換する
#!/usr/bin/env python
#encoding=utf-8
# Convert image to Pwmout grayscale data for dot-matrix LED
# Input image format can be JPEG, PNG etc
from PIL import Image
import sys
if __name__ == "__main__":
argvs = sys.argv
argc = len(argvs)
if (argc != 2):
print 'Usage: # python %s filename' % argvs[0]
quit()
im = Image.open(argvs[1])
pix = im.load()
print "const float img[", im.size[0], "][", im.size[1], "] = {"
for y in range(0, im.size[1]):
for x in range(0, im.size[0]):
# conver RGB to grayscale
gray = (0.299 * pix[x,y][0] + 0.587 * pix[x,y][1] + 0.114 * pix[x,y][2])
print ((255-gray)/256), ","
print "};"
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