How does the mat file which can be obtained from SVHN convert to image file.

convert2image.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import numpy as np
import scipy.io
import scipy.misc

train_data = scipy.io.loadmat("train_32x32.mat")
train_x = train_data['X']
train_y = [flatten for inner in train_data['y'] for flatten in inner]
print train_x.shape

f = open('train_data.txt', 'w')
for i in range(train_x.shape[3]):
    img_name = "img/train%08d.png" % i
    scipy.misc.imsave(img_name, train_x[:,:,:,i])
    f.write(img_name + "\t" + str(train_y[i]) + "\n")

f.close()