merge

1 files changed, 295 insertions, 0 deletions

diff --git a/module/plugins/captcha/captcha.py b/module/plugins/captcha/captcha.py
new file mode 100644
index 000000000..283b171e0
--- /dev/null
+++ b/module/plugins/captcha/captcha.py
@@ -0,0 +1,295 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+#Copyright (C) 2009 kingzero, RaNaN
+#
+#This program is free software; you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation; either version 3 of the License,
+#or (at your option) any later version.
+#
+#This program is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#See the GNU General Public License for more details.
+#
+#You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+#
+###
+from __future__ import with_statement
+import logging
+import subprocess
+import tempfile
+import threading
+
+import Image
+
+class RunThread(threading.Thread):
+    def __init__(self):
+        threading.Thread.__init__(self)
+
+    def e(self, command, inputdata=None):
+        """execute command """
+        self.command = command
+        self.inputdata = inputdata
+        self.result = ""
+        self.start()
+        self.join(10)
+        return self.result
+
+    def run(self):
+        """Run a command and return standard output"""
+        pipe = subprocess.PIPE
+        popen = subprocess.Popen(self.command, stdout=pipe, stderr=pipe)
+        outputdata, errdata = popen.communicate(self.inputdata)
+        assert (popen.returncode == 0), \
+            "Error running: %s\n\n%s" % (self.command, errdata)
+        self.result = outputdata
+
+class OCR(object):
+    def __init__(self):
+        self.logger = logging.getLogger("log")
+
+    def load_image(self, image):
+        self.image = Image.open(image)
+        self.pixels = self.image.load()
+        self.result_captcha = ''
+
+    def unload(self):
+        """delete all tmp images"""
+        pass
+
+    def threshold(self, value):
+        self.image = self.image.point(lambda a: a * value + 10)
+
+    def run(self, command, inputdata=None):
+        """Run a command and return standard output"""
+    #        OLD METHOD
+    #        pipe = subprocess.PIPE
+    #        popen = subprocess.Popen(command, stdout=pipe, stderr=pipe)
+    #        outputdata, errdata = popen.communicate(inputdata)
+    #        assert (popen.returncode == 0), \
+    #            "Error running: %s\n\n%s" % (command, errdata)
+    #        return outputdata
+
+        thread = RunThread()
+        result = thread.e(command, inputdata)
+        return result
+
+    def run_gocr(self):
+        tmp = tempfile.NamedTemporaryFile(suffix=".jpg")
+        self.image.save(tmp)
+        self.result_captcha = self.run(['gocr', tmp.name]).replace("\n", "")
+
+    def run_tesser(self):
+        self.logger.debug("create tmp tif")
+        tmp = tempfile.NamedTemporaryFile(suffix=".tif")
+        self.logger.debug("create tmp txt")
+        tmpTxt = tempfile.NamedTemporaryFile(suffix=".txt")
+        self.logger.debug("save tiff")
+        self.image.save(tmp.name, 'TIFF')
+        self.logger.debug("run tesseract")
+        self.run(['tesseract', tmp.name, tmpTxt.name.replace(".txt", "")])
+        self.logger.debug("read txt")
+
+        with open(tmpTxt.name, 'r') as f:
+            self.result_captcha = f.read().replace("\n", "")
+
+    def get_captcha(self):
+        raise NotImplementedError
+
+    def to_greyscale(self):
+        if self.image.mode != 'L':
+            self.image = self.image.convert('L')
+
+        self.pixels = self.image.load()
+
+    def eval_black_white(self, limit):
+        self.pixels = self.image.load()
+        w, h = self.image.size
+        for x in xrange(w):
+            for y in xrange(h):
+                if self.pixels[x, y] > limit:
+                    self.pixels[x, y] = 255
+                else:
+                    self.pixels[x, y] = 0
+
+    def clean(self, allowed):
+        pixels = self.pixels
+
+        w, h = self.image.size
+
+        for x in xrange(w):
+            for y in xrange(h):
+                if pixels[x, y] == 255: continue
+                # no point in processing white pixels since we only want to remove black pixel
+                count = 0
+
+                try:
+                    if pixels[x-1, y-1] != 255: count += 1
+                    if pixels[x-1, y] != 255: count += 1
+                    if pixels[x-1, y + 1] != 255: count += 1
+                    if pixels[x, y + 1] != 255: count += 1
+                    if pixels[x + 1, y + 1] != 255: count += 1
+                    if pixels[x + 1, y] != 255: count += 1
+                    if pixels[x + 1, y-1] != 255: count += 1
+                    if pixels[x, y-1] != 255: count += 1
+                except:
+                    pass
+
+        # not enough neighbors are dark pixels so mark this pixel
+            # to be changed to white
+                if count < allowed:
+                    pixels[x, y] = 1
+
+            # second pass: this time set all 1's to 255 (white)
+        for x in xrange(w):
+            for y in xrange(h):
+                if pixels[x, y] == 1: pixels[x, y] = 255
+
+        self.pixels = pixels
+
+    def derotate_by_average(self):
+        """rotate by checking each angle and guess most suitable"""
+
+        w, h = self.image.size
+        pixels = self.pixels
+
+        for x in xrange(w):
+            for y in xrange(h):
+                if pixels[x, y] == 0:
+                    pixels[x, y] = 155
+
+        highest = {}
+        counts = {}
+
+        for angle in range(-45, 45):
+
+            tmpimage = self.image.rotate(angle)
+
+            pixels = tmpimage.load()
+
+            w, h = self.image.size
+
+            for x in xrange(w):
+                for y in xrange(h):
+                    if pixels[x, y] == 0:
+                        pixels[x, y] = 255
+
+
+            count = {}
+
+            for x in xrange(w):
+                count[x] = 0
+                for y in xrange(h):
+                    if pixels[x, y] == 155:
+                        count[x] += 1
+
+            sum = 0
+            cnt = 0
+
+            for x in count.values():
+                if x != 0:
+                    sum += x
+                    cnt += 1
+
+            avg = sum / cnt
+            counts[angle] = cnt
+            highest[angle] = 0
+            for x in count.values():
+                if x > highest[angle]:
+                    highest[angle] = x
+
+            highest[angle] = highest[angle] - avg
+
+        hkey = 0
+        hvalue = 0
+
+        for key, value in highest.iteritems():
+            if value > hvalue:
+                hkey = key
+                hvalue = value
+
+        self.image = self.image.rotate(hkey)
+        pixels = self.image.load()
+
+        for x in xrange(w):
+            for y in xrange(h):
+                if pixels[x, y] == 0:
+                    pixels[x, y] = 255
+
+                if pixels[x, y] == 155:
+                    pixels[x, y] = 0
+
+        self.pixels = pixels
+
+    def split_captcha_letters(self):
+        captcha = self.image
+        started = False
+        letters = []
+        width, height = captcha.size
+        bottomY, topY = 0, height
+        pixels = captcha.load()
+
+        for x in xrange(width):
+            black_pixel_in_col = False
+            for y in xrange(height):
+                if pixels[x, y] != 255:
+                    if started == False:
+                        started = True
+                        firstX = x
+                        lastX = x
+
+                    if y > bottomY: bottomY = y
+                    if y < topY: topY = y
+                    if x > lastX: lastX = x
+
+                    black_pixel_in_col = True
+
+            if black_pixel_in_col == False and started == True:
+                rect = (firstX, topY, lastX, bottomY)
+                new_captcha = captcha.crop(rect)
+
+                w, h = new_captcha.size
+                if w > 5 and h > 5:
+                    letters.append(new_captcha)
+
+                started = False
+                bottomY, topY = 0, height
+
+        return letters
+
+    def correct(self, values, var=None):
+
+        if var:
+            result = var
+        else:
+            result = self.result_captcha
+
+        for key, item in values.iteritems():
+
+            if key.__class__ == str:
+                result = result.replace(key, item)
+            else:
+                for expr in key:
+                    result = result.replace(expr, item)
+
+        if var:
+            return result
+        else:
+            self.result_captcha = result
+
+
+if __name__ == '__main__':
+    ocr = OCR()
+    ocr.load_image("B.jpg")
+    ocr.to_greyscale()
+    ocr.eval_black_white(140)
+    ocr.derotate_by_avergage()
+    ocr.run_gocr()
+    print "GOCR", ocr.result_captcha
+    ocr.run_tesser()
+    print "Tesseract", ocr.result_captcha
+    ocr.image.save("derotated.jpg")
+