Python - Resizing Image

Quiz

Description

Resizing an image is the process to change the size of the image without changing the number of pixels in the image.

Parameters

from PIL import Image

im2 = im1.resize((width, height), Image.NEAREST) # use nearest neighbour

Resize method returns a resized copy of this image.

1st argument : param size: The requested size in pixels, as a 2-tuple(width, height).
2nd argument : An optional resampling filter. This can beone of

PIL.Image.NEAREST` (use nearest neighbour),
PIL.Image.BILINEAR` (linear interpolation),
PIL.Image.BICUBIC` (cubic spline interpolation), or
PIL.Image.LANCZOS` (a high-quality downsampling filter).
If omitted, or if the image has mode "1" or "P",

Return value

Below program takes the single file as input and returns a resized copy of this image.

Example

The following example shows how to resize the single image into 4 different ways.

from PIL import Image
# open an image file (.bmp,.jpg,.png,.gif) you have in the working folder
imageFile = "flower3.jpg"
im1 = Image.open(imageFile)
# adjust width and height to your needs
width = 500
height = 420
# use one of these filter options to resize the image
im2 = im1.resize((width, height), Image.NEAREST) # use nearest neighbour
im3 = im1.resize((width, height), Image.BILINEAR) # linear interpolation in a 2x2 environment
im4 = im1.resize((width, height), Image.BICUBIC) # cubic spline interpolation in a 4x4 environment
im5 = im1.resize((width, height), Image.ANTIALIAS) # best down-sizing filter
ext = ".jpg"
im2.save("NEAREST" + ext)
im3.save("BILINEAR" + ext)
im4.save("BICUBIC" + ext)
im5.save("ANTIALIAS" + ext)

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