Dr. Tarek Bahaa El Deen
Assistant Professor in Graphic Design

what is the different between Image Resolution and Line Screen

Spatial resolution, typically some number of dots per inch, corresponds roughly to the ability to render graphic detail. On a computer screen, it’s the number of pixels per linear inch (ppi); on an output device, it’s the number of dots printed in a linear inch (dpi); on a scanner, it’s the number of pixels sampled per linear inch of the scanned image. The resolution of a raster image depends on the size it’s printed as well as on the pixel dimensions of the file. Pixel dimensions determine file size; and, as a practical matter, file size is related to storage and processing efficiencies.

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Comments (5)

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Aziz Soubai

Posted on 6/19/18 3:49:56 AM Permalink

Thanks for sharing your work

Clint Balsar

Posted on 3/1/14 2:30:23 AM Permalink

Thanks for the resource, Lukas. It explains it well.


Posted on 10/7/13 6:00:27 PM Permalink


This is a good resource! Nice one!


Lukas Engqvist

Posted on 9/24/13 5:30:34 PM Permalink

Aziz Soubai

Posted on 6/19/18 3:50:31 AM Permalink

Thanks for sharing your work