Setting image dpi size of tiff Image

Can anyone suggest me a method for setting the size of tiff image to 300 dpi.
I got the following code
http://markmail.org/download.xqy?id=lljtrh4jtsowwlok&number=1
But the image dpi size remains the same after this
Edited by: Priya on Dec 29, 2008 10:58 AM

Why do you think the dpi remains the same after using the code in the link?
Any given printer dosen't necessarily have to honor the dpi setting in an image format. In fact, usually the image viewer used to print the image takes control of the physical size of the image.

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