tf.image 中间开始切图片，一定大小 tf.image.resize_image_with_crop_or_pad

# -*- coding:utf-8 -*-
import tensorflow as tf
import cv2


img=cv2.imread(filename="234.jpg")

img2 = tf.image.resize_image_with_crop_or_pad(img, target_height=200, target_width=300)


with tf.Session() as sess:
    sess.run(tf.global_variables_initializer())
    print (img.shape)
    cv2.imshow("img",img)
    img2=sess.run(img2)
    print ("*********************")
    cv2.imshow("img2", img2)
    print ("ok")

    cv2.waitKey(0)