Changing DPI with resampling of an image
Posted: 2010-11-04T02:18:58-07:00
Hi,
I want to change the DPI of my image using imagemagick, now i found out this can be done by using -density. But as i understand it this will just edit the metadata (filesize remains the same) of the image and the DPI value will be used when printing (it's actually PPI i thought). If you change it it will make the print size larger. But what if i want to change the DPI with resampling (so that it keeps the same size and removes the extra pixels)? This way i will have a bit of quality loss but the filesize will be smaller.
I found the info about DPI and resampling here: http://www.andrewdaceyphotography.com/articles/dpi/
I'm not an expert in these things so it's possible that i'm wrong..
kind regards,
Daan
I want to change the DPI of my image using imagemagick, now i found out this can be done by using -density. But as i understand it this will just edit the metadata (filesize remains the same) of the image and the DPI value will be used when printing (it's actually PPI i thought). If you change it it will make the print size larger. But what if i want to change the DPI with resampling (so that it keeps the same size and removes the extra pixels)? This way i will have a bit of quality loss but the filesize will be smaller.
I found the info about DPI and resampling here: http://www.andrewdaceyphotography.com/articles/dpi/
I'm not an expert in these things so it's possible that i'm wrong..
kind regards,
Daan