dpi of an image

Forum|Forum|16 years ago
August 14, 2009
2 replies
3107 views

Hi,

How to find an dpi of an image using coldfusion?

is there any way to modify an images dpi using coldfusion?

This topic has been closed for replies.

C

CF_Ray

Participant

Try:

tImage=imageRead(pathToSourceImage);

writeDump(ImageGetEXIFMetadata(tImage)['X Resolution'],'console');

I'm using CF9

A

Anonymous

Using CF 8 you can resize an image, but not, so far as I can see, set the dpi of an image.

I think that it is expected that the image file will be optimised for the web before it is uploaded, using tools such as Photoshop, Microsoft Photo Gallery, HP Photosmart.

Not sure if CF 9 improves on this position. It is not expressly mentioned in any of the releases.

Cheers

bryn51

T

tooMuchTrouble

Inspiring

ImageGetEXIFMetadata()

A

Anonymous

ImageGetEXIFMetadata(name) gets the infor required in a structure, but there does not appear to be a mechanism for expressly setting the pixel density.

Of course there is ImageScaleToFit(name, fitWidth, fitHeight [, interpolation , blurFactor]) but that does not allow the pixel density to be expressly set (as a number) either, but by intelligent use or experimentation with the interpolation, it might suit the mans purpose in downsizing the file size, after all there are people out there that will happily upload a 3 MB jpeg image from their camera without giving it a thought.

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