1 files changed, 147 insertions, 0 deletions
diff --git a/module/plugins/captcha/LinksaveIn.py b/module/plugins/captcha/LinksaveIn.py
new file mode 100644
index 000000000..3ad7b265a
--- /dev/null
+++ b/module/plugins/captcha/LinksaveIn.py
@@ -0,0 +1,147 @@
+from captcha import OCR
+import Image
+from os import sep
+from os.path import dirname
+from os.path import abspath
+from glob import glob
+
+
+class LinksaveIn(OCR):
+    __name__ = "LinksaveIn"
+    def __init__(self):
+        OCR.__init__(self)
+        self.data_dir = dirname(abspath(__file__)) + sep + "LinksaveIn" + sep
+    
+    def load_image(self, image):
+        im = Image.open(image)
+        frame_nr = 0
+
+        lut = im.resize((256, 1))
+        lut.putdata(range(256))
+        lut = list(lut.convert("RGB").getdata())
+
+        new = Image.new("RGB", im.size)
+        npix = new.load()
+        while True:
+            try:
+                im.seek(frame_nr)
+            except EOFError:
+                break
+            frame = im.copy()
+            pix = frame.load()
+            for x in range(frame.size[0]):
+                for y in range(frame.size[1]):
+                    if lut[pix[x, y]] != (0,0,0):
+                        npix[x, y] = lut[pix[x, y]]
+            frame_nr += 1
+        new.save(self.data_dir+"unblacked.png")
+        self.image = new.copy()
+        self.pixels = self.image.load()
+        self.result_captcha = ''
+    
+    def get_bg(self):
+        stat = {}
+        cstat = {}
+        img = self.image.convert("P")
+        for bgpath in glob(self.data_dir+"bg/*.gif"):
+            stat[bgpath] = 0
+            bg = Image.open(bgpath)
+            
+            bglut = bg.resize((256, 1))
+            bglut.putdata(range(256))
+            bglut = list(bglut.convert("RGB").getdata())
+            
+            lut = img.resize((256, 1))
+            lut.putdata(range(256))
+            lut = list(lut.convert("RGB").getdata())
+            
+            bgpix = bg.load()
+            pix = img.load()
+            for x in range(bg.size[0]):
+                for y in range(bg.size[1]):
+                    rgb_bg = bglut[bgpix[x, y]]
+                    rgb_c = lut[pix[x, y]]
+                    try:
+                        cstat[rgb_c] += 1
+                    except:
+                        cstat[rgb_c] = 1
+                    if rgb_bg == rgb_c:
+                        stat[bgpath] += 1
+        max_p = 0
+        bg = ""
+        for bgpath, value in stat.items():
+            if max_p < value:
+                bg = bgpath
+                max_p = value
+        return bg
+    
+    def substract_bg(self, bgpath):
+        bg = Image.open(bgpath)
+        img = self.image.convert("P")
+        
+        bglut = bg.resize((256, 1))
+        bglut.putdata(range(256))
+        bglut = list(bglut.convert("RGB").getdata())
+        
+        lut = img.resize((256, 1))
+        lut.putdata(range(256))
+        lut = list(lut.convert("RGB").getdata())
+        
+        bgpix = bg.load()
+        pix = img.load()
+        orgpix = self.image.load()
+        for x in range(bg.size[0]):
+            for y in range(bg.size[1]):
+                rgb_bg = bglut[bgpix[x, y]]
+                rgb_c = lut[pix[x, y]]
+                if rgb_c == rgb_bg:
+                    orgpix[x, y] = (255,255,255)
+    
+    def eval_black_white(self):
+        new = Image.new("RGB", (140, 75))
+        pix = new.load()
+        orgpix = self.image.load()
+        thresh = 4
+        for x in range(new.size[0]):
+            for y in range(new.size[1]):
+                rgb = orgpix[x, y]
+                r, g, b = rgb
+                pix[x, y] = (255,255,255)
+                if r > max(b, g)+thresh:
+                    pix[x, y] = (0,0,0)
+                if g < min(r, b):
+                    pix[x, y] = (0,0,0)
+                if g > max(r, b)+thresh:
+                    pix[x, y] = (0,0,0)
+                if b > max(r, g)+thresh:
+                    pix[x, y] = (0,0,0)
+        self.image = new
+        self.pixels = self.image.load()
+    
+    def get_captcha(self, image):
+        self.load_image(image)
+        bg = self.get_bg()
+        self.substract_bg(bg)
+        self.eval_black_white()
+        self.to_greyscale()
+        self.image.save(self.data_dir+"cleaned_pass1.png")
+        self.clean(4)
+        self.clean(4)
+        self.image.save(self.data_dir+"cleaned_pass2.png")
+        letters = self.split_captcha_letters()
+        final = ""
+        for n, letter in enumerate(letters):
+            self.image = letter
+            self.image.save(ocr.data_dir+"letter%d.png" % n)
+            self.run_tesser(True, True, False, False)
+            final += self.result_captcha
+        
+        return final
+
+if __name__ == '__main__':
+    import urllib
+    ocr = LinksaveIn()
+    testurl = "http://linksave.in/captcha/cap.php?hsh=2229185&code=ZzHdhl3UffV3lXTH5U4b7nShXj%2Bwma1vyoNBcbc6lcc%3D"
+    urllib.urlretrieve(testurl, ocr.data_dir+"captcha.gif")
+    
+    print ocr.get_captcha(ocr.data_dir+'captcha.gif')