import tensorflow as tf
import matplotlib.pyplot as plt
import cv2
from PIL import Image
import numpy as np
from scipy import misc
(x_train_all,y_train_all),(x_test,y_test) = tf.keras.datasets.mnist.load_data()
x_valid,x_train = x_train_all[:5000],x_train_all[5000:]
y_valid,y_train = y_train_all[:5000],y_train_all[5000:]
print(x_valid.shape,y_valid.shape)
print(x_train.shape,y_train.shape)
print(x_test.shape,y_test.shape)
#讀取單張圖片
def show_single_img(img_arr,len=100,path='/Users/zhangcaihui/Desktop/case/jpg/'):
 for i in range(len):#我這種寫法會(huì)進(jìn)行覆蓋，只能保存10張照片，想保存更多的數(shù)據(jù)自己看著改
  new_im = Image.fromarray(img_arr[i])  # 調(diào)用Image庫(kù)，數(shù)組歸一化
  #new_im.show()
  #plt.imshow(img_arr)  # 顯示新圖片
  label=y_train[i]
  new_im.save(path+str(label)+'.jpg')  # 保存圖片到本地
#顯示多張圖片
def show_imgs(n_rows,n_cols,x_data,y_data):
 assert len(x_data) == len(y_data)
 assert n_rows * n_cols < len(x_data)
 plt.figure(figsize=(n_cols*1.4,n_rows*1.6))
 for row in range(n_rows):
  for col in range(n_cols):
index = n_cols * row + col
plt.subplot(n_rows,n_cols,index+1)
plt.imshow(x_data[index],cmap="binary",interpolation="nearest")
plt.axis("off")
 plt.show()
#show_imgs(2,2,x_train,y_train)
show_single_img(x_train)

#ui_openimage.py
# -*- coding: utf-8 -*-
# from PyQt5 import QtCore, QtGui, QtWidgets
# from PyQt5.QtCore import Qt
import sys,time
from PyQt5 import QtGui, QtCore, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
class Ui_Form(object):
 def setupUi(self, Form):
  Form.setObjectName("Form")
  Form.resize(1144, 750)
  self.label_1 = QtWidgets.QLabel(Form)
  self.label_1.setGeometry(QtCore.QRect(170, 130, 351, 251))
  self.label_1.setObjectName("label_1")
  self.label_2 = QtWidgets.QLabel(Form)
  self.label_2.setGeometry(QtCore.QRect(680, 140, 351, 251))
  self.label_2.setObjectName("label_2")
  self.btn_image = QtWidgets.QPushButton(Form)
  self.btn_image.setGeometry(QtCore.QRect(270, 560, 93, 28))
  self.btn_image.setObjectName("btn_image")
  self.btn_recognition = QtWidgets.QPushButton(Form)
  self.btn_recognition.setGeometry(QtCore.QRect(680,560,93,28))
  self.btn_recognition.setObjectName("bnt_recognition")
  #顯示時(shí)間按鈕
  self.bnt_timeshow = QtWidgets.QPushButton(Form)
  self.bnt_timeshow.setGeometry(QtCore.QRect(900,0,200,50))
  self.bnt_timeshow.setObjectName("bnt_timeshow")
  self.retranslateUi(Form)
  self.btn_image.clicked.connect(self.slot_open_image)
  self.btn_recognition.clicked.connect(self.slot_output_digital)
  self.bnt_timeshow.clicked.connect(self.buttonClicked)
  self.center()
  QtCore.QMetaObject.connectSlotsByName(Form)
 def retranslateUi(self, Form): #設(shè)置文本填充label、button
  _translate = QtCore.QCoreApplication.translate
  Form.setWindowTitle(_translate("Form", "數(shù)字識(shí)別系統(tǒng)"))
  self.label_1.setText(_translate("Form", "點(diǎn)擊下方按鈕"))
  self.label_1.setStyleSheet('font:50px;')
  self.label_2.setText(_translate("Form", "0~9"))
  self.label_2.setStyleSheet('font:50px;')
  self.btn_image.setText(_translate("Form", "選擇圖片"))
  self.btn_recognition.setText(_translate("From","識(shí)別結(jié)果"))
  self.bnt_timeshow.setText(_translate("Form","當(dāng)前時(shí)間"))
 # 狀態(tài)條顯示時(shí)間模塊
 def buttonClicked(self):  # 動(dòng)態(tài)顯示時(shí)間
  timer = QTimer(self)
  timer.timeout.connect(self.showtime)
  timer.start()
 def showtime(self):
  datetime = QDateTime.currentDateTime()
  time_now = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())
  #self.statusBar().showMessage(time_now)
  #self.bnt_timeshow.setFont(QtGui.QFont().setPointSize(100))
  self.bnt_timeshow.setText(time_now)
 def center(self):#窗口放置中央
  screen = QDesktopWidget().screenGeometry()
  size = self.geometry()
  self.move((screen.width() - size.width()) / 2,
  (screen.height() - size.height()) / 2)

 def keyPressEvent(self, e):
  if e.key() == Qt.Key_Escape:
self.close()

#ui_main.py
import random
from PyQt5.QtWidgets import QFileDialog
from PyQt5.QtGui import QPixmap
from ui_openimage import Ui_Form
import sys
from PyQt5 import QtWidgets, QtGui
from PyQt5.QtWidgets import QMainWindow, QTextEdit, QAction, QApplication
import os,sys
from PyQt5.QtCore import Qt
import tensorflow
from tensorflow.keras.models import load_model
from tensorflow.keras.datasets import mnist
from tensorflow.keras import models
from tensorflow.keras import layers
from tensorflow.keras.utils import to_categorical
import tensorflow.keras.preprocessing.image as image
import matplotlib.pyplot as plt
import numpy as np
import cv2
import warnings
warnings.filterwarnings("ignore")
class window(QtWidgets.QMainWindow,Ui_Form):
 def __init__(self):
  super(window, self).__init__()
  self.cwd = os.getcwd()
  self.setupUi(self)
  self.labels = self.label_1
  self.img=None
 def slot_open_image(self):
  file, filetype = QFileDialog.getOpenFileName(self, '打開(kāi)多個(gè)圖片', self.cwd, "*.jpg, *.png, *.JPG, *.JPEG, All Files(*)")
  jpg = QtGui.QPixmap(file).scaled(self.labels.width(), self.labels.height())
  self.labels.setPixmap(jpg)
  self.img=file
 def slot_output_digital(self):
 	'''path為之前保存的模型路徑'''
  path='/Users/zhangcaihui/PycharmProjects/py38_tf/DL_book_keras/save_the_model.h5'
  model= load_model(path)
  #防止不上傳數(shù)字照片而直接點(diǎn)擊識(shí)別
  if self.img==None:
self.label_2.setText('請(qǐng)上傳照片！')
return
  img = image.load_img(self.img, target_size=(28, 28))
  img = img.convert('L')#轉(zhuǎn)灰度圖像
  x = image.img_to_array(img)
  #x = abs(255 - x)
  x = np.expand_dims(x, axis=0)
  print(x.shape)
  x = x / 255.0
  prediction = model.predict(x)
  print(prediction)
  output = np.argmax(prediction, axis=1)
  print("手寫數(shù)字識(shí)別為：" + str(output[0]))
  self.label_2.setText(str(output[0]))
if __name__ == "__main__":
  app = QtWidgets.QApplication(sys.argv)
  my = window()
  my.show()
  sys.exit(app.exec_())