title: OSError: cannot identify image file in CNN
body: <p>I'm using keras librairy, and when I try to run a train of model with <code>classifier.fit_generator(training_set,samples_per_epoch = 50, nb_epoch = 5,validation_data = test_set, nb_val_samples = 20)</code> </p>
  
  <p>i get this error <code>OSError: cannot identify image file 'dataset/training_set\\cow\\OIP-FEq-NuYf4tBwOAHanAfxPQHaFP.jpeg'</code>.</p>
  
  <p>if any one here can help me 
  my code is the following:</p>
  
  <pre><code>
  train_datagen = ImageDataGenerator(rescale = 1./255,
                                     shear_range = 0.2,
                                     zoom_range = 0.2,
                                     horizontal_flip = True)
  
  test_datagen = ImageDataGenerator(rescale = 1./255)
  
  training_set = train_datagen.flow_from_directory('dataset/training_set',
                                                   target_size = (64, 64),
                                                   batch_size = 32,
                                                   class_mode = 'binary')
  
  test_set = test_datagen.flow_from_directory('dataset\test_set',
                                              target_size = (64, 64),
                                              batch_size = 32,
                                              class_mode = 'binary')
  
  classifier.fit_generator(training_set,
                           samples_per_epoch = 50,
                           nb_epoch = 5,
                           validation_data = test_set,
                           nb_val_samples = 20) ```
  </code></pre>