python/captcha
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Improve ImageCaptcha

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Hsiaoming Yang
2015-10-04 17:51:58 +08:00
parent c8b4c771d5
commit 9572e23c07
1 changed files with 4 additions and 3 deletions
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7
captcha/image.py
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@@ -161,7 +161,7 @@ class ImageCaptcha(_Captcha):
dx = random.randint(0, 4)
dy = random.randint(0, 6)
im = Image.new('RGB', (w + dx, h + dy), background)
im = Image.new('RGBA', (w + dx, h + dy))
Draw(im).text((dx, dy), c, font=font, fill=color)
# rotate
@@ -197,13 +197,14 @@ class ImageCaptcha(_Captcha):
image = image.resize((width, self._height))
average = int(text_width / len(chars))
rand = int(0.15 * average)
rand = int(0.25 * average)
offset = int(average * 0.1)
for im in images:
w, h = im.size
mask = im.convert('L').point(lambda i: i * 1.97)
image.paste(im, (offset, int((self._height - h) / 2)), mask)
offset = offset + w + random.randint(-rand, rand)
offset = offset + w + random.randint(-rand, 0)
return image