Programming Forums > Script Programming > Python

Dietrich · Apr 30th, 2006, 1:56 PM

What is the best way to double the size of an image and still have an acceptable quality?

I have a JPEG image format in mind.

Sane · Apr 30th, 2006, 2:29 PM

In pygame you can do it like so:

(Toggle Plain Text)

import pygame

image = pygame.image.load("my_image.jpeg")

size = image.get_size()

image = pygame.transform.scale(image, (size[0]*2, size[1]*2))

pygame.image.save("my_new_image.bmp", image)

The problem with that is it can only be saved in bitmap.

I used PIL to do this, but don't feel like digging through old code to get it out. Sorry. If you search for the "Python Image Library Documentation", they already have example code for how to do it.

By the way, I haven't tested the pygame code. But it'll be roughly that if not exactly.

Dietrich · Apr 30th, 2006, 2:53 PM

Sane,

that works! The arguments in save() have to be reversed.

Apr 30th, 2006, 1:56 PM	#1
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Increase Image What is the best way to double the size of an image and still have an acceptable quality? I have a JPEG image format in mind. __________________ I looked it up on the Intergnats!

Apr 30th, 2006, 2:29 PM	#2
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 2,086 Rep Power: 6	In pygame you can do it like so: (Toggle Plain Text) import pygame image = pygame.image.load("my_image.jpeg") size = image.get_size() image = pygame.transform.scale(image, (size[0]2, size[1]2)) pygame.image.save("my_new_image.bmp", image) import pygame image = pygame.image.load("my_image.jpeg") size = image.get_size() image = pygame.transform.scale(image, (size[0]2, size[1]2)) pygame.image.save("my_new_image.bmp", image) The problem with that is it can only be saved in bitmap. I used PIL to do this, but don't feel like digging through old code to get it out. Sorry. If you search for the "Python Image Library Documentation", they already have example code for how to do it. By the way, I haven't tested the pygame code. But it'll be roughly that if not exactly.

Apr 30th, 2006, 2:53 PM	#3
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Sane, that works! The arguments in save() have to be reversed. __________________ I looked it up on the Intergnats!

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Programming Forums > Script Programming > Python

Increase Image