python - 如何使用python中的tkinter上的保存按钮保存图像

Question

我尝试使用 tkinter 创建“另存为”按钮将图像保存在某个位置目录中，但遇到了问题

from tkinter import *
from tkinter import ttk
from tkinter import filedialog
from PIL import ImageTk, Image, ImageDraw
import cv2
import numpy as np

img = cv2.imread('face_person1.jpg')
# convert the images to PIL format...
edged = Image.fromarray(img)

edged = ImageTk.PhotoImage(edged)

def savefile():
    hsl = Image.open(edged)
    hsl = filedialog.asksaveasfile(mode='w', defaultextension=".jpg")
    if hsl is None:
        return
    sv = edged.save()
    sv.close()


button = Button(text="save as", command=savefile)
button.pack()

错误信息是:

Exception in Tkinter callback fp = io.BytesIO(fp.read())
AttributeError: 'numpy.ndarray' object has no attribute 'read'

Answer 1

要保存图像，您必须使用 PIL.Image，因此不要将 PhotoImage 分配给用于保存 PIL.Image 的变量

edge = Image.fromarray(img)

tk_edge = ImageTk.PhotoImage(edge)

并且您必须使用文件名来保存它

edge.save(filename)

完整的工作示例

import tkinter as tk
from tkinter import ttk
from tkinter import filedialog
from PIL import ImageTk, Image, ImageDraw
import cv2
import numpy as np

# --- functions ---

def savefile():
    filename = filedialog.asksaveasfile(mode='w', defaultextension=".jpg")
    if not filename:
        return
    edge.save(filename)

# --- main ---

root = tk.Tk()

img = cv2.imread('face_person1.jpg')
edge = Image.fromarray(img)

tk_edge = ImageTk.PhotoImage(edge)
label = tk.Label(root, image=tk_edge)
label.pack()

button = tk.Button(root, text="save as", command=savefile)
button.pack()

root.mainloop()