Comparing images 1

[MrBelfry]

Hi there

I have a php photo gallery which now contains thousands of photos (saved as jpgs). I was wondering if it was possible to use php to automatically check for duplicated images. NB none of the images have the same file name so i couldn't just check that but it is it possible for php to compare images at a binary level?

It is possible I'm asking the impossible but i hop someone can help!

ps I'm using win2000, apache and php 4.3.1 with whatever version of GD that is bundled with (incase that makes any difference)

MrBelfry

 

[sleipnir214]

GD does not have any functions like what you want to do.

You might try generating MD5 checksums for all your graphic files and comparing those.

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[MrBelfry]

A friend suggested i could use the fopen function to compare two images but as i have over 2000 images (and growing) i figure that this will be extremely slow!

sleipnir you are a genius and i'll implement his idea. a big shiny star for you!

MrBelfry