如何在画布上旋转图像90度。

Question

在画布上有一个已加载的图像，我必须将其旋转90度，但当我旋转它时，它不适合在画布上，背景颜色越来越黑，我希望图像能正确地适合在画布上。

import tkinter as tk
from tkinter import *
from PIL import Image,ImageTk


class SimpleApp(tk.Frame):
    def __init__(self, master, filename, **kwargs):
        self.master = master
        self.filename = filename
        tk.Frame.__init__(self, master)
        self.canvas = tk.Canvas(master, width=1500, height=1200,bg='white')
        self.canvas.grid(row=0,column=0,sticky=(N,W,E,S))
        self.image = Image.open("C:\\Users\\Sripad Jevala\\Desktop\\RESIZE\\Cat1_1.jpg")
        angle = 90
        self.tkimage = ImageTk.PhotoImage(self.image.rotate(angle))
        canvas_obj = self.canvas.create_image(550, 350, image=self.tkimage)

root = tk.Tk()
root.grid_columnconfigure(0, weight=1)
root.grid_rowconfigure(0, weight=1)
app = SimpleApp(root, "C:\\Users\\Sripad Jevala\\Desktop\\RESIZE\\Cat1_1.jpg")
root.mainloop()

Answer 1

你需要设置 expand=1:

self.tkimage = ImageTk.PhotoImage(self.image.rotate(angle, expand=1))