looking at grains of a screw

gistfile1.py

#!/usr/bin/python

from SimpleCV import Image, Color

#images = ("fastener0.png", "fastener1.png", "fastener2.png", "fastener3.png", "fastener4.png");
images = ["fastener4.png"]

count = 0

for i in images:
  s = Image(i).stretch(50, 255)
  bin = s.binarize(-1, blocksize = 9)
  blobs = bin.findBlobs()
  blobs.filter((blobs.angle() > 0) & (blobs.angle() < 55)  & (blobs.area() < 100)).draw(color = Color.BLUE)
  blobs.filter((blobs.angle() < 0) & (blobs.angle() > -55) & (blobs.area() < 100)).draw(color = Color.GREEN)
  bin.save("grains" + str(count) + ".png")
  print "saved fastener ", count
  count = count + 1