如何使tkinter可滚动画布与背景图像？

from tkinter import *
from PIL import ImageTk, Image

root = Tk()
canvas = Canvas(root)

scrollbar = Scrollbar(root, orient="vertical", command=canvas.yview)
canvas.configure(yscrollcommand=scrollbar.set)

frame = Frame(root)
frame.pack(fill=BOTH, expand=True)

canvas.create_window((0, 0), window=frame, anchor="nw")
canvas.configure(scrollregion=canvas.bbox("all"))

image = Image.open("background.jpg")
background = ImageTk.PhotoImage(image)
background_label = Label(frame, image=background)
background_label.place(x=0, y=0, relwidth=1, relheight=1)

scrollbar.pack(side="right", fill="y")

root.mainloop()