Pixelate an image

[rmoyes02]

Hi, I need to have a php webpage that allow a user to specify a .jpg on their hard drive, then display that picture on the webpage in an extremely pixelated form. For example, it could shrink that image to 20x20 (original = 200x200), then expand that image to 200x200. So that it appears to be severly pixelated.

Any help on how to get started would be much appreciated.

Thanks!

 

[vacunita]

Well, you'll probably want to look into the GD family of functions for PHP:

http://php.net/manual/en/book.image.php

These will allow you to manipulate images in many different ways.

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[rmoyes02]

Thanks, thats a good place to start.

 

[spamjim]

If doing this in a web page, it may be best to reduce the image to 20x20 pixels through GD or your favorite image processor function, and then render the image in the web page scaled back to its 200x200 size only through HTML. Rescaling the image file again from 20x20 to 200x200 through an image processor would mean wasted bandwidth with larger image file sizes.