In this example, we will see how to display images using the library Pillow in Python.
The operation of the geometric transformation of images mainly includes the following aspects:
- Change the image size: You can use the resize() method to change the size of the image. The usage is: resize((width, height))
- Rotate image: You can use the rotate() method to turn the angle of the image. The usage is: rotate(angle)
- Reverse the image: You can use the transpose() method to reverse the image. The usage is: transpose(method)
The parameter method can be the following: FLIP_LEFT_RIGHT, FLIP_TOP_BOTTOM, ROTATE_90, ROTATE_180, or ROTATE_270.
This example will create four graphics, from left to right, the original graphics, using the rotate() method to rotate the 45° angle, the transpose() method to rotate the 90° angle, and the resize() method to change the image size to 1/4 of the original size.
Source Code
#! /usr/bin/env python3
# -*- coding: utf-8 -*-
# rotateImages.py
from tkinter import *
from PIL import Image, ImageTk
win = Tk()
win.title(string = "Image Rotation")
# open an image
path = "F:/logos/"
imgFile1 = Image.open(path + "superman.png")
img1 = ImageTk.PhotoImage(imgFile1)
label1 = Label(win, width=162, height=160, image=img1)
label1.pack(side=LEFT)
# rotate 45°
imgFile2 = imgFile1.rotate(45)
img2 = ImageTk.PhotoImage(imgFile2)
label2 = Label(win, width=162, height=160, image=img2)
label2.pack(side=LEFT)
# rotate 90°
imgFile3 = imgFile1.transpose(Image.ROTATE_90)
img3 = ImageTk.PhotoImage(imgFile3)
label3 = Label(win, width=162, height=160, image=img3)
label3.pack(side=LEFT)
# reduce the image size to 1/4
width, height = imgFile1.size
imgFile4 = imgFile1.resize((int(width/2), int(height/2)))
img4 = ImageTk.PhotoImage(imgFile4)
# display the original image
label4 = Label(win, width=162, height=160, image=img4)
label4.pack(side=LEFT)
win.mainloop()
4. Data
superman.png: this is the image that we’re going to rotate.
5. Results
