Python Imaging Library PIL

pip install Pillow

Python Imaging Library: Pillow basics to create or read images to resize, rotate, generate thumbnail

Creating a new Image

img = Image.new(mode, size, color)

mode: RGB or RGBA
size: Tuple (width,height) of the image.
color : yellow , green or other supported colours OR Hex value

from PIL import Image
path = "F:\\testing\\images\\test3.png"  # new image to create 
img = Image.new("RGB", (400, 200), color="#F1F1CC")
img.save(path)

Saving Image

In above code we used the file name and path to save the image.

Image.save(path, format=None, **params)

Opening Image

Image.open(path, mode='r', formats=None)

path: Path of the image to open
mode : 'r' for read mode
formats : A list of tuple of formats.

from PIL import Image
path = "F:\\testing\\images\\cat.png"  # existing image to open
img = Image.open(path, mode="r")
img.show()

Getting image details

path = "F:\\testing\\images\\cat.png"  # existing image to open
img = Image.open(path)
print(img.format)  # Image format
print(img.mode)  # pixel mode RGBA
print(img.size)  # ( 620,500)
print(img.height)  # 500
print(img.width)  # 620
print(img.info)  # all details about the image.

Rotate Image

from PIL import Image
path = "F:\\testing\\images\\cat.png"  # existing image to open
path2 = "F:\\testing\\images\\cat2.png"  # Path to save
img = Image.open(path)
img2 = img.rotate(45)  # rotate by 45 degree
img2.show()
img2.save(path2) # save rotated image

Retaining the size after rotate.

img2 = img.rotate(45, expand=True)  # rotate by 45 degree

Resizing Images

Image.resize(size, resample=None, box=None, reducing_gap=None)[source]

size: Tuple (width, height), required size.
resample : optional resampling filter
box : optional, for the region to be scaled. (0,0,width,height)
reducing_gap : Apply optimization by resizing the image in two steps.

from PIL import Image

path = "F:\\testing\\images\\jump.jpeg"  # Path to Image
path2 = "F:\\testing\\images\\jump_resize.jpeg"  # resized
img = Image.open(path, mode="r")  # create image object
img.show()  # display
img_new = img.resize((200, 200))  # resize the image
print(img.size)  # original image size ( width , height)
print(img_new.size)  # resized image size ( width, height)
img_new.show()  # display resized image
img_new.save(path2)  # save resized image

Thumbnail

To maintain aspect ratios we have to use thumbnail(). We can also give maximum width and maximum height (as tuple) of the thumbnail image.

from PIL import Image

path = "F:\\testing\\images\\jump.jpeg"  # Path to Image
path2 = "F:\\testing\\images\\jump_thumbnail.jpeg"  # resized
img = Image.open(path, mode="r")  # create image object
img.show()  # display
print(img.size) # main image size ( width, height)
img.thumbnail((200, 200))  # max width, max height
img.save(path2)  # save thumbnail  image
print(img.size)  # thumbnail size ( width, height)
img.show()  # display resized image

Above code will print two outputs as sizes, note how the aspect ratio is maintained while creating Thumbnail image.

(1024, 768)
(200, 150)

Thumbnails using Pillow and Tkinter GUI

Image Crop

To crop an image we have to use crop()

Image.crop(box=None)

box : the rectangle or tuple( left,upper, right, lower )

from PIL import Image

path = "F:\\testing\\images\\cat-crop.jpeg"  # Path to Image
path2 = "F:\\testing\\images\\cat-crop2.jpeg"  # new image
img = Image.open(path, mode="r")  # create image object
img.show()  # display
print(img.size)  # main image size ( width, height)
box = (20, 65, 470, 550)  # rectangle for crop
img_crop = img.crop(box)  # Cropped image object
img_crop.save(path2)  # save cropped image
print(img_crop.size)  # cropped image size ( width, height)
img_crop.show()  # display cropped  image

Check the size of images, compare with the rectangle ( box ) input given to the crop().

(768, 1024)
(450, 485)

Removing Background

This script effectively removes the background from an image and saves the edited image to a specified location on your system. It's a simple yet powerful way to process images for various applications, such as graphic design, web development, or product photography.

Install the library

pip install rembg

Full code is here

from rembg import remove
from PIL import Image

input_path = 'D:\\testing\\images\\yanam-raj.png'
output_path = 'D:\\testing\\images\\out1.png'

input = Image.open(input_path)
output = remove(input)
output.save(output_path)

ImageDraw to add Line, rectangle, circle to an Image. ImageDraw to add Text to an Image. ImageFilter
Displaying Resized image in Tkinter GUI using PIL Thumbnails using Pillow and Tkinter GUI Watermark on Image using text and Image

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Subhendu Mohapatra

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