Image not displaying in canvas when both created in function

[pwatts2132]

In my code, when I use a function to create a canvas and an image in the canvas it does not display the image in the canvas. On the other hand, when I don't use a function to create the canvas and the image in the canvas, it will display the image properly in the canvas. I am stumped on this issue and can't seem to figure out the problem. Any help is welcomed.

import tkinter
import customtkinter
from tkinter import filedialog
from PIL import ImageTk, Image

def select_image():
    filepath = filedialog.askopenfilename()
    create_image_canvas(filepath)

def create_image_canvas(filepath):
    img = ImageTk.PhotoImage(Image.open(filepath))
    img_height = img.height()
    img_width = img.width()
    canvas = customtkinter.CTkCanvas(master=img_frame, height=img_height, width=img_width, bd=0)
    canvas.place(relx=0.5, rely=0.5, anchor=tkinter.CENTER)
    canvas.create_image(img_width/2, img_height/2, anchor=tkinter.CENTER, image=img)

root = customtkinter.CTk()
root.geometry("1280x720")
root.resizable(0, 0)

img_frame = customtkinter.CTkFrame(master=root, height=704, width=1008, border_width=1)
img_frame.pack(padx=8, pady=8, side="left")

tab_view = customtkinter.CTkTabview(master=root, height=704, width=240, border_width=1)
tab_view.pack(padx=8, pady=8, side="right")
test_tab = tab_view.add("Test Tab")

img_select = customtkinter.CTkButton(master=img_frame, height=100, width=400, border_width=1, command=lambda: select_image())
img_select.place(relx=0.5, rely=0.5, anchor=tkinter.CENTER)

zoom_slider = customtkinter.CTkSlider(master=test_tab, from_=25, to=400, number_of_steps=75)
zoom_slider.place(relx=0.5, rely=0.5, anchor=tkinter.CENTER)

'''img = ImageTk.PhotoImage(Image.open("test_shirt1.png"))
img_height = img.height()
img_width = img.width()
canvas = customtkinter.CTkCanvas(master=img_frame, height=img_height, width=img_width, bd=0)
canvas.place(relx=0.5, rely=0.5, anchor=tkinter.CENTER)
canvas.create_image(img_width/2, img_height/2, anchor=tkinter.CENTER, image=img)'''

root.mainloop()