tensorflow加载模型

git链接

参考链接
训练模型

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sat Mar 16 22:26:43 2019

@author: lg
"""

#coding=utf-8 
# 载入MINIST数据需要的库
from tensorflow.examples.tutorials.mnist import input_data
# 保存模型需要的库
from tensorflow.python.framework.graph_util import convert_variables_to_constants 
from tensorflow.python.framework import graph_util 
# 导入其他库
import tensorflow as tf
import cv2  
import numpy as np 
#获取MINIST数据
mnist = input_data.read_data_sets(".",one_hot = True)
# 创建会话 
sess = tf.InteractiveSession()
 
#占位符
x = tf.placeholder("float", shape=[None, 784], name="Mul")
y_ = tf.placeholder("float",shape=[None, 10],  name="y_")
#变量
W = tf.Variable(tf.zeros([784,10]),name='x')
b = tf.Variable(tf.zeros([10]),'y_')
 
#权重
def weight_variable(shape):
  initial = tf.truncated_normal(shape, stddev=0.1)
  return tf.Variable(initial)
#偏差
def bias_variable(shape):
  initial = tf.constant(0.1, shape=shape)
  return tf.Variable(initial)
#卷积
def conv2d(x, W):
  return tf.nn.conv2d(x, W, strides=[1, 1, 1, 1], padding='SAME')
#最大池化
def max_pool_2x2(x):
  return tf.nn.max_pool(x, ksize=[1, 2, 2, 1],
                        strides=[1, 2, 2, 1], padding='SAME')
#相关变量的创建
W_conv1 = weight_variable([5, 5, 1, 32])
b_conv1 = bias_variable([32])
x_image = tf.reshape(x, [-1,28,28,1])
h_conv1 = tf.nn.relu(conv2d(x_image, W_conv1) + b_conv1)
h_pool1 = max_pool_2x2(h_conv1)
W_conv2 = weight_variable([5, 5, 32, 64])
b_conv2 = bias_variable([64])
#激活函数
h_conv2 = tf.nn.relu(conv2d(h_pool1, W_conv2) + b_conv2)
h_pool2 = max_pool_2x2(h_conv2)
W_fc1 = weight_variable([7 * 7 * 64, 1024])
b_fc1 = bias_variable([1024])
W_fc2 = weight_variable([1024, 10])
b_fc2 = bias_variable([10])
 
h_pool2_flat = tf.reshape(h_pool2, [-1, 7*7*64])
h_fc1 = tf.nn.relu(tf.matmul(h_pool2_flat, W_fc1) + b_fc1)
keep_prob = tf.placeholder("float",name='rob')
h_fc1_drop = tf.nn.dropout(h_fc1, keep_prob)
 
#用于训练用的softmax函数
y_conv=tf.nn.softmax(tf.matmul(h_fc1_drop, W_fc2) + b_fc2,name='res')
#用于训练作完后，作测试用的softmax函数
y_conv2=tf.nn.softmax(tf.matmul(h_fc1, W_fc2) + b_fc2,name="final_result")
 
#交叉熵的计算，返回包含了损失值的Tensor。
 
cross_entropy = -tf.reduce_sum(y_*tf.log(y_conv))
#优化器，负责最小化交叉熵
train_step = tf.train.AdamOptimizer(1e-4).minimize(cross_entropy)
 
correct_prediction = tf.equal(tf.argmax(y_conv,1), tf.argmax(y_,1))
#计算准确率
accuracy = tf.reduce_mean(tf.cast(correct_prediction, "float"))
#初始化所以变量
sess.run(tf.global_variables_initializer())
 
 # 保存输入输出，可以为之后用
tf.add_to_collection('res', y_conv)
tf.add_to_collection('output', y_conv2)
tf.add_to_collection('x', x)
 
#训练开始
for i in range(1000):
  batch = mnist.train.next_batch(50)
  if i%100 == 0:
    train_accuracy = accuracy.eval(feed_dict={
        x:batch[0], y_: batch[1], keep_prob: 1.0})
    print ("step %d, training accuracy %g"%(i, train_accuracy))
#run()可以看做输入相关值给到函数中的占位符，然后计算的出结果，这里将batch[0]，给xbatch[1]给y_
  train_step.run(feed_dict={x: batch[0], y_: batch[1], keep_prob: 0.5})
 
#将当前图设置为默认图
graph_def = tf.get_default_graph().as_graph_def() 
#将上面的变量转化成常量，保存模型为pb模型时需要,注意这里的final_result和前面的y_con2是同名，只有这样才会保存它，否则会报错，
# 如果需要保存其他tensor只需要让tensor的名字和这里保持一直即可
output_graph_def = tf.graph_util.convert_variables_to_constants(sess,  
                graph_def, ['final_result'])  
#保存前面训练后的模型为pb文件
with tf.gfile.GFile("grf.pb", 'wb') as f:  
        f.write(output_graph_def.SerializeToString())
 
#用saver 保存模型
saver = tf.train.Saver()   
saver.save(sess, "model_data/model")  
 
##导入图片，同时灰度化
#im = cv2.imread('pic/e2.jpg',cv2.IMREAD_GRAYSCALE)
##反转图像，因为e2.jpg为白底黑字   
#im =reversePic(im)
#cv2.namedWindow("camera", cv2.WINDOW_NORMAL); 
#cv2.imshow('camera',im)  
#cv2.waitKey(0) 
# 
##调整大小
#im = cv2.resize(im,(28,28),interpolation=cv2.INTER_CUBIC)   
#x_img = np.reshape(im , [-1 , 784])  
# 
# 
##输出图像矩阵
## print x_img 
# 
##用上面导入的图片对模型进行测试
#output = sess.run(y_conv2 , feed_dict={x:x_img })  
## print 'the y_con :   ', '\n',output  
#print ('the predict is : ', np.argmax(output) )
#print ("test accracy %g"%accuracy.eval(feed_dict={
#    x: mnist.test.images, y_: mnist.test.labels, keep_prob: 1.0}))

加载模型第一种

# -*- coding:utf-8 -*-    
import cv2  
import tensorflow as tf  
import numpy as np  
from sys import path  
#用于将自定义输入图片反转
def reversePic(src):
        # 图像反转  
    for i in range(src.shape[0]):
        for j in range(src.shape[1]):
            src[i,j] = 255 - src[i,j]
    return src 
          
def main():  
    sess = tf.InteractiveSession()  
#模型恢复
    saver=tf.train.import_meta_graph('model_data/model.meta')
 
    saver.restore(sess, 'model_data/model')
    graph = tf.get_default_graph()
    
    # 获取输入tensor,,获取输出tensor
    input_x = sess.graph.get_tensor_by_name("Mul:0")
    y_conv2 = sess.graph.get_tensor_by_name("final_result:0")
 
    # 也可以上面注释,通过下面获取输出输入tensor,
    # y_conv2 = tf.get_collection('output')[0]
    # # x= tf.get_collection('x')[0]
    # input_x = graph.get_operation_by_name('Mul').outputs[0]
    # keep_prob = graph.get_operation_by_name('rob').outputs[0]
    
    path1="pic/e2.jpg"  
    im = cv2.imread(path1,cv2.IMREAD_GRAYSCALE)
    #反转图像，因为e2.jpg为白底黑字   
    im =reversePic(im)
#    cv2.namedWindow("camera", cv2.WINDOW_NORMAL); 
#    cv2.imshow('camera',im)  
#    cv2.waitKey(0)  
    # im=cv2.threshold(im, , 255, cv2.THRESH_BINARY_INV)[1];
 
    im = cv2.resize(im,(28,28),interpolation=cv2.INTER_CUBIC)  
 
    # im=cv2.threshold(im,200,255,cv2.THRESH_TRUNC)[1]
    # im=cv2.threshold(im,60,255,cv2.THRESH_TOZERO)[1]
 
    #数据从0~255转为-0.5~0.5  
    # img_gray = (im - (255 / 2.0)) / 255  
    x_img = np.reshape(im , [-1 , 784])  
    output = sess.run(y_conv2 , feed_dict={input_x:x_img})  
    print ('the predict is %d' % (np.argmax(output)) )
    #关闭会话  
    sess.close()  
  
if __name__ == '__main__':  
    main()  

加载模型第二种

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sun Mar 17 11:15:53 2019

@author: lg
"""

#coding=utf-8 
from __future__ import absolute_import, unicode_literals
from tensorflow.examples.tutorials.mnist import input_data
from tensorflow.python.framework.graph_util import convert_variables_to_constants 
from tensorflow.python.framework import graph_util 
import cv2 
import numpy as np  
mnist = input_data.read_data_sets(".",one_hot = True)
import tensorflow as tf
 
#用于将自定义输入图片反转
def reversePic(src):
        # 图像反转  
    for i in range(src.shape[0]):
        for j in range(src.shape[1]):
            src[i,j] = 255 - src[i,j]
    return src 
 
with tf.Session() as persisted_sess:
  print("load graph")
  with tf.gfile.FastGFile("grf.pb",'rb') as f:
    graph_def = tf.GraphDef()
    graph_def.ParseFromString(f.read())
    persisted_sess.graph.as_default()
    tf.import_graph_def(graph_def, name='')
  # print("map variables")
  with tf.Session() as sess:
 
        # tf.initialize_all_variables().run()
        input_x = sess.graph.get_tensor_by_name("Mul:0")
        y_conv_2 = sess.graph.get_tensor_by_name("final_result:0")
 
 
        path="pic/e2.jpg"  
        im = cv2.imread(path,cv2.IMREAD_GRAYSCALE) 
        #反转图像，因为e2.jpg为白底黑字   
        im =reversePic(im)
#        cv2.namedWindow("camera", cv2.WINDOW_NORMAL); 
#        cv2.imshow('camera',im)  
#        cv2.waitKey(0) 
        # im=cv2.threshold(im, , 255, cv2.THRESH_BINARY_INV)[1];
 
        im = cv2.resize(im,(28,28),interpolation=cv2.INTER_CUBIC)  
        # im =reversePic(im)
        # im=cv2.threshold(im,200,255,cv2.THRESH_TRUNC)[1]
        # im=cv2.threshold(im,60,255,cv2.THRESH_TOZERO)[1]
 
        # img_gray = (im - (255 / 2.0)) / 255  
        x_img = np.reshape(im , [-1 , 784])  
        output = sess.run(y_conv_2 , feed_dict={input_x:x_img})  
        print ('the predict is %d' % (np.argmax(output)) )
        #关闭会话  
        sess.close()