my picture after using tf.image.resize_images becomes horrible picture

Question

1. original_picture (size:128*128) like this:

2. after using this function

   image = tf.image.resize_images(original_image,(128,128))
   

3. finally I use plt.imshow() to show my hand picture

Answer 1

The problem comes from tensorflow's resize_images function returning floats.

To properly resize and view the image you would need something like:

import tensorflow as tf
import matplotlib.pyplot as plt
import numpy as np

with tf.Session() as sess:

    tf.global_variables_initializer().run()
    image = tf.image.resize_images(original_image,(128,128))
    # Cast image to np.uint8 so it can be properly viewed
    # eval() tensor to get numpy array.
    image = tf.cast(image, np.uint8).eval()

plt.imshow(image)