# coding=gbk

from PIL import Image

import numpy as np

# import scipy

import matplotlib.pyplot as plt

def ImageToMatrix(filename):

    # 读取图片

    im = Image.open(filename)

    # 显示图片

#     im.show()

    width,height = im.size

    im = im.convert("L")

    data = im.getdata()

    data = np.matrix(data,dtype='float')/255.0

    new_data = np.reshape(data,(width,height))

    return new_data

#     new_im = Image.fromarray(new_data)

#     # 显示图片

#     new_im.show()

def MatrixToImage(data):

    data = data*255

    new_im = Image.fromarray(data.astype(np.uint8))

    return new_im

filename = 'lena.jpg'

data = ImageToMatrix(filename)

print data

new_im = MatrixToImage(data)

plt.imshow(data, cmap=plt.cm.gray, interpolation='nearest')

new_im.show()

new_im.save('lena_1.bmp')