Resolution change

[sikaniska]

Hi,

I am new to IM so sorry if this is too easy for you.

I would like to change resolution in a image file to 220 ppi. But I would like to do it in a way that doesn't change the image data. I also need the image not to change it's filename.

I tried

Code: Select all

convert -density 220 image.jpg image.jpg

but that results in repackaged jpg.

Is there a way to just change the resolution info without touching the image data?

Thanks,
-kimmo

[fmw42]

I don't believe that you can do that with IM. You will need to find some other tool.

[sikaniska]

Ok. Thanks for the info.

-kimmo

[anthony]

You could try other more format specific tools, like jhead