斷點(diǎn)續(xù)訓(xùn),在mnist_backward.py中的with tf.Session()下加入ckpt的那三句話

圖片.png
實(shí)現(xiàn)輸入手寫數(shù)字圖片輸出識別結(jié)果
代碼可能存在未對齊的情況
mnist_app.py
#coding:utf-8
import tensorflow as tf
import numpy as np
from PIL import Image
import mnist_backward
import mnist_forward
def restore_model(testPicArr):
with tf.Graph().as_default() as tg:
x = tf.placeholder(tf.float32, [None, mnist_forward.INPUT_NODE])
y = mnist_forward.forward(x, None)
preValue = tf.argmax(y, 1)
variable_averages = tf.train.ExponentialMovingAverage(mnist_backward.MOVING_AVERAGE_DECAY)
variables_to_restore = variable_averages.variables_to_restore()
saver = tf.train.Saver(variables_to_restore)
with tf.Session() as sess:
ckpt = tf.train.get_checkpoint_state(mnist_backward.MODEL_SAVE_PATH)
if ckpt and ckpt.model_checkpoint_path:
saver.restore(sess, ckpt.model_checkpoint_path)
preValue = sess.run(preValue, feed_dict={x:testPicArr})
return preValue
else:
print("No checkpoint file found")
return -1
#預(yù)處理
def pre_pic(picName):
img = Image.open(picName) #打開傳入的圖片
reIm = img.resize((28,28), Image.ANTIALIAS) #為符合shape,用消除鋸齒的方法resize
im_arr = np.array(reIm.convert('L')) #為符合顏色的要求,變成灰度圖,并轉(zhuǎn)化成矩陣的形式
threshold = 50
#模型要求輸入的是黑底白字,我們輸入的圖片是白底黑字
#反色
for i in range(28):
for j in range(28):
im_arr[i][j] = 255 - im_arr[i][j] #求得互補(bǔ)的反色
if (im_arr[i][j] < threshold): #給圖片做二值化處理,讓圖片只有純白色點(diǎn)和純黑色點(diǎn),可以濾掉手寫數(shù)字圖片中的噪聲,留下圖片主要特征
#灰度圖像二值化最常用的方法是閾值法,他利用圖像中目標(biāo)與背景的差異,把圖像分別設(shè)置為兩個不同的級別,選取一個合適的閾值,以確定某像素是目標(biāo)還是背景,從而獲得二值化的圖像。
im_arr[i][j] = 0 #純黑色是0
else: im_arr[i][j] = 255 #純白色255
nm_arr = im_arr.reshape([1, 784])
nm_arr = nm_arr.astype(np.float32)
img_ready = np.multiply(nm_arr, 1.0/255.0)
return img_ready
def application():
testNum = int(input("input the number of test pictures:") )#輸入要識別幾張圖片,input函數(shù)可以實(shí)現(xiàn)從控制臺讀入數(shù)字
for i in range(testNum):
testPic = input("the path of test picture:") #給出識別圖片的路徑和名稱,raw_input函數(shù)實(shí)現(xiàn)從控制臺讀入字符串
testPicArr = pre_pic(testPic)
preValue = restore_model(testPicArr)
print "The prediction number is:", preValue
def main():
application()
if __name__ == '__main__':
main()
代碼及手寫圖片下載地址
我自己手寫了一個5,結(jié)果給我識別成3了,嗚嗚嗚~