model = Sequential()
model.add(Conv2D(10, kernel_size=2, activation='relu', 
                 input_shape=(img_rows, img_cols, 1), 
                 padding='equal'))

# Second convolutional layer
model.add(Conv2D(10, kernel_size=2, activation='relu')

model.add(Flatten())
model.add(Dense(3, activation='softmax'))