CAPTCHA-breaking/test_type5.py at master · lllcho/CAPTCHA-breaking · GitHub

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# __author__ = 'lllcho'
# __date__ = '2015/9/29'
import cv2
import h5py
import codecs
import numpy as np
from keras.models import Sequential
from keras.layers.core import Dense, Dropout, Activation, Flatten
from keras.layers.convolutional import Convolution2D, MaxPooling2D
from keras.regularizers import l2

letters = list('0123456789abcdefghijklmnopqrstuvwxyz')
weight_decay = 0.001

nb_model = Sequential()
nb_model.add(Convolution2D(32, 1, 4, 4, border_mode='full', activation='relu', W_regularizer=l2(weight_decay)))
nb_model.add(Convolution2D(32, 32, 4, 4, activation='relu', W_regularizer=l2(weight_decay)))
nb_model.add(MaxPooling2D(poolsize=(2, 3)))
nb_model.add(Dropout(0.25))
nb_model.add(Convolution2D(64, 32, 4, 4, border_mode='full', activation='relu', W_regularizer=l2(weight_decay)))
nb_model.add(Convolution2D(64, 64, 4, 4, activation='relu', W_regularizer=l2(weight_decay)))
nb_model.add(MaxPooling2D(poolsize=(2, 3)))
nb_model.add(Dropout(0.25))
nb_model.add(Convolution2D(64, 64, 4, 4, activation='relu', W_regularizer=l2(weight_decay)))
nb_model.add(Dropout(0.25))
nb_model.add(Flatten())
nb_model.add(Dense(64 * 6 * 8, 512, activation='relu', W_regularizer=l2(weight_decay)))
nb_model.add(Dropout(0.5))
nb_model.add(Dense(512, 3, activation='softmax'))
nb_model.load_weights('model/type5_nb_model.d5')
nb_model.compile(loss='categorical_crossentropy', optimizer='adagrad')

chars_model = Sequential()
chars_model.add(Convolution2D(32, 1, 4, 4, border_mode='valid', activation='relu', ))
chars_model.add(Convolution2D(32, 32, 4, 4, activation='relu', ))
chars_model.add(MaxPooling2D(poolsize=(2, 2)))
chars_model.add(Dropout(0.3))
chars_model.add(Convolution2D(64, 32, 4, 4, border_mode='full', activation='relu', ))
chars_model.add(Convolution2D(64, 64, 4, 4, activation='relu', ))
chars_model.add(MaxPooling2D(poolsize=(2, 2)))
chars_model.add(Dropout(0.3))
chars_model.add(Flatten())
chars_model.add(Dense(64 * 7 * 3, 512, activation='relu', ))
chars_model.add(Dropout(0.6))
chars_model.add(Dense(512, 36, activation='softmax'))
chars_model.load_weights("model/type5_chars_model.d5")
chars_model.compile(loss='categorical_crossentropy', optimizer='adagrad')

comp = 'type5_test1'
img_dir = './image/' + comp + '/'
f_csv = codecs.open("result/" + comp + '.csv', 'w', 'utf-8')
# for nb_img in range(1,20001):
#     name=comp+'_'+str(nb_img)+'.png'
import os

names = os.listdir(img_dir)
for name in names:
    imgname = img_dir + name
    img = cv2.imread(imgname, cv2.IMREAD_GRAYSCALE)
    retval, t = cv2.threshold(img, 127, 1, cv2.THRESH_BINARY_INV)
    s = t.sum(axis=0)
    y1, y2 = (s > np.median(s) + 5).nonzero()[0][0], (s > np.median(s) + 5).nonzero()[0][-1]
    x1, x2 = 0, 36
    im = img[x1:x2, y1 - 2:y2 + 3]
    retval, im = cv2.threshold(im, 127, 255, cv2.THRESH_BINARY_INV)
    im0 = im[x1:x2, 1:-1]
    if im.shape[1] < 100:
        im = np.concatenate((im, np.zeros((36, 100 - im.shape[1]), dtype='uint8')), axis=1)
    else:
        im = cv2.resize(im, (100, 36))
    I = im > 127
    I = I.astype(np.float32).reshape((1, 1, 36, 100))
    n = nb_model.predict_classes(I, verbose=0) + 4
    im1 = np.zeros((36, 150), dtype=np.uint8)
    im1[:, 10:im0.shape[1] + 10] = im0
    step = im0.shape[1] / float(n)
    center = [i + step / 2 for i in np.arange(0, im0.shape[1], step).tolist()]
    imgs = np.zeros((n, 1, 36, 20), dtype=np.float32)
    for i, c in enumerate(center):
        imgs[i, 0, :, :] = im1[:, c:c + 20]
    classes = chars_model.predict_classes(imgs.astype('float32') / 255.0, verbose=0)
    result = []
    for c in classes:
        result.append(letters[c])
    print(name, ''.join(result).upper())
    f_csv.write(name + ',' + ''.join(result).upper() + '\n')
f_csv.close()