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Image Manipulation – Height, Width, DPI

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Aug 07.2007

Hey All,

I have been looking for a PHP solution for my problem.

I have seem many sites that show you how to re-size the Height and Width of an image, but nothing with the DPI of an image.

Problem;

Have an image of 800 x 600 with a DPI of 200

Solution:

Need to re-size the image to a smaller number divisible by 8

AND

to have the image at 120 DPI

Setup:

Running php 4.3
OS: Suse 10.1

Do not have the GD library installed :-(, but I think I can install it if needed

Thanks in advance

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PHP

3 Comments(s) ↴

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@kbc1Aug 07.2007 — Hi Phil

Images can only be viewed at 72 DPI on a web page anyway so what is the need to resample at anything above?

The GD library (which you will need to install) comes with a couple of functions that will help you out:

[code=php]imagecopyresampled();
imagecreatetruecolor();[/code]

Good luck
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@Phill_PaffordauthorAug 07.2007 — The reason is that these images goto a mainframe and need to be in a certain format
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@ellisglAug 07.2007 — I would also look at imagemagick.
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