将字符分割的代码合并过来了，放在Tools下面。

.gitignore

@@ -2,3 +2,4 @@
 *~
 .ropeproject/
 *.jpg
+Images/

EffectLab/Effect.py

@@ -71,7 +71,7 @@ def filter(self, img):
                         found += 1 
 
                 if found > 0:
-                    psum = map(operator.div, psum, (antialias * antialias, ) * len(psum)) 
+                    psum = map(operator.div, psum, (found, ) * len(psum)) 
                     new_img.putpixel((x, y), tuple(psum))
 
         return new_img 
@@ -140,7 +140,7 @@ def filter(self, img):
                         found += 1 
 
                 if found > 0:
-                    psum = map(operator.div, psum, (antialias * antialias, ) * len(psum)) 
+                    psum = map(operator.div, psum, (found, ) * len(psum)) 
                     new_img.putpixel((x, y), tuple(psum))
 
         return new_img 
@@ -191,7 +191,7 @@ def filter(self, img):
                         found += 1 
 
                 if found > 0:
-                    psum = map(operator.div, psum, (self.antialias * self.antialias, ) * len(psum)) 
+                    psum = map(operator.div, psum, (found, ) * len(psum)) 
                     new_img.putpixel((i, j), tuple(psum))
 
         return new_img

TestEffectLab.py

@@ -6,9 +6,12 @@
 
 import os, time, string, random
 import autoreload
+import ImageChops
 from math import sqrt, sin, cos, tan, atan2
 from EffectLab.Effect import *
 
+Effect.empty_color = (255, 255, 255, 255)
+
 def merge_origin_and_new(img, effect):
     '''Merge origin and new Image processed by function effect in one Image
     '''
@@ -27,17 +30,21 @@ def merge_origin_and_new(img, effect):
 
     return out
 
+class Character(object):
+    def __init__(self, img):
+        self.width, self.height = img.size
+        self.img = img
 
 def main():
     print 'Started'
 
     effects = [
         RadianFormulaEffect(lambda r, phi: (r ** 2, phi), 4), 
-        LensWarpEffect(lambda x, y: (sin(x * math.pi / 2), sin(y * math.pi / 2))),
-        RadianFormulaEffect(lambda r, phi: (r ** 1.5 * math.cos(r), phi)),
-        GlobalWaveEffect(),
         RadianSqrtEffect(),
+        GlobalWaveEffect(),
         LensWarpEffect(lambda x, y: (sign(x) * x ** 2, sign(y) * y ** 2)),
+        LensWarpEffect(lambda x, y: (sin(x * math.pi / 2), sin(y * math.pi / 2))),
+        RadianFormulaEffect(lambda r, phi: (r ** 1.5 * math.cos(r), phi)),
         LocalWarpEffect((130, 120), (130, 50), 100),
                ] 
 
@@ -46,15 +53,29 @@ def main():
     # else:
     #     img = Image.new("RGBA", (300, 300), (255, 255, 255, 255))
 
+    characters = string.letters + string.digits
+    char_img = {} 
+    for ch in characters:
+        img = Image.open('Images/%s.png' % ch)
+        char_img[ch] = Character(img)
+
     text = ''.join(random.choice(string.letters) for i in xrange(4))
 
-    img = Image.new("RGB", (100, 40), (255, 255, 255))
+    img = Image.new("RGBA", (100, 40), (255, 255, 255, 255))
     font = ImageFont.truetype("UbuntuMono-R.ttf", 33)
-    draw = ImageDraw.Draw(img) 
-    draw.setfont(font)
+    # draw = ImageDraw.Draw(img) 
+    # draw.setfont(font) 
+    # draw.text((10, 0), text, (0, 0, 0)) 
 
-    draw.text((10, 0), text, (0, 0, 0)) 
-    del draw
+    last = random.choice(characters)
+    offset = 15
+    for i in range(5):
+        ch = random.choice(characters)
+        img.paste(char_img[ch].img,
+                  (offset, 0),
+                  ImageChops.invert(char_img[ch].img.split()[1]))
+        last = ch
+        offset += char_img[last].width - 1
 
     for index, effect in enumerate(effects):
         merge_origin_and_new(img, effect).save('%d.jpg' % index, quality=90)

Tools/.gitignore

@@ -0,0 +1 @@
+*.png

Tools/GeneratorCharacters.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+# author:  Hua Liang [ Stupid ET ]
+# email:   [email protected]
+# website: http://EverET.org
+#
+# This is a tools that generate each image of character
+
+import random, string, md5, time
+import Image, ImageDraw, ImageFont
+import StringIO, string
+
+def get_vertical_map(img):
+    img = img.convert('L') 
+    # segmentation
+    m = [0] * width 
+    for x in range(width):
+        for y in range(height):
+            if img.getpixel((x, y)) != 255:
+                m[x] += 1
+    return m
+
+def get_character_region(iterator):
+    '''get character region
+    '''
+    state = "empty"
+
+    i, lbd, rbd = 0, -1, -1
+    while True:
+        data = iterator.next() 
+        if state == "empty":
+            if data != 0:
+                # enter
+                state = "collect"
+                lbd = i
+        elif state == "collect":
+            if data == 0:
+                # leave
+                rbd = i
+                state = "empty"
+                yield (lbd, rbd)
+        i += 1
+
+width, height = 1200, 40
+
+characters = string.letters + string.digits
+
+# draw img
+img = Image.new("RGBA", (width, height), (255, 255, 255, 0))
+font = ImageFont.truetype("../UbuntuMono-R.ttf", 33)
+draw = ImageDraw.Draw(img) 
+draw.setfont(font)
+draw.text((10, 0), characters, (0, 0, 0, 255)) 
+del draw
+
+m = get_vertical_map(img)
+
+for index, bd in enumerate(get_character_region(iter(m))):
+    ch = characters[index]
+
+    img.crop((bd[0], 0, bd[1], height)).save('../Images/%s.png' % ch) 
+