import cv2
import numpy as np
import sys
import os
import tkinter           
import PIL
 
from PIL import Image,ImageTk
from tkinter import ttk
from tkinter.messagebox import showinfo

global canvas
global pre_img1
 
def position_picture(f):    
    img=PIL.Image.open(f)
    img=img.resize((150,150))
    preview_img=ImageTk.PhotoImage(img)    
    return preview_img
 
def selected_picture():
    global canvas,pre_img1
    
    d=tkinter.filedialog.askopenfilename(title='picture',filetypes=[('jpg','*.jpg')])
    
    pre_img1=position_picture(d)
    canvas.delete('all')
    canvas.create_image((75,75),image=pre_img1)  

if __name__=='__main__':
 
    global canvas
    global pre_img1
    
    root=tkinter.Tk()
    root.title("預(yù)覽")
 
    pre_img=position_picture(fn)
    canvas=tkinter.Canvas(root,width=150,height=150,bg='white')
    canvas.grid(column=2,row=0)
    canvas.create_image((75,75),image=pre_img)
 
    for i in range(0,5):
        canvas1=tkinter.Canvas(root,width=150,height=150,bg='white')
        canvas1.grid(column=i,row=4)
        canvas1.create_image((75,75),image=pre_img)
 
    ......
    
    button1=ttk.Button(root,text="選擇圖片",command=selected_picture)
    button1.grid(column=2,row=2)
 
    button2=ttk.Button(root,text="自動分類",command=identify_picture)
    button2.grid(column=2,row=3)
 
    root.mainloop