def _generate_art(self, image, width, height):
"""
Return an iterator that produces the ascii art.
"""
image = image.resize((width, height), Image.ANTIALIAS).convert("RGB")
pixels = list(image.getdata())
for y in range(0, height - 1, 2):
for x in range(width):
i = y * width + x
bg = rgb2short(*(pixels[i]))
fg = rgb2short(*(pixels[i + width]))
yield (fg, bg)
def _generate_art(self, image, width, height):
"""
Return an iterator that produces the ascii art.
"""
# Characters aren't square, so scale the output by the aspect ratio of a charater
height = int(height * self._char_width / float(self._char_height))
image = image.resize((width, height), Image.ANTIALIAS).convert("RGB")
for (r, g, b) in image.getdata():
greyscale = int(0.299 * r + 0.587 * g + 0.114 * b)
ch = self._chars[int(greyscale / 255. * (len(self._chars) - 1) + 0.5)]
yield (ch, rgb2short(r, g, b))
def test_rgb2short():
assert rgb2short(100, 100, 100) == 59