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image resolution

Posted: Fri Dec 08, 2006 12:58 am
by kpraman
Hello,

How to get image resolution in PHP?

I tried using getimagesize(). It gives only width and height in pixels.

Thanx

Posted: Fri Dec 08, 2006 6:14 am
by John Cartwright
What do you want? To determine the size of an image or the size of the screens resolution?

Posted: Fri Dec 08, 2006 7:22 am
by kpraman
I have to give the details of images for press. It should be in dpi

Posted: Fri Dec 08, 2006 9:01 am
by onion2k
There's no such thing as DPI in digital images. What you're asking for doesn't exist.

Posted: Fri Dec 08, 2006 1:14 pm
by feyd
JPEG and TIFF headers have DPI. If memory serves so does PNG.. but they're useless as at press-time it's most often overridden by the layout editor.

The exif extension may be useful..

... which reminds me, I need to put together a class to read XMP sometime..