images sizes

Forum|Forum|8 years ago
July 18, 2017
2 replies
619 views

Hi, i am having a lot of confusions about image resize for large print for weeks.

Is there an easy way to determine and to resize a picture for large format print? a rule of thumb? what works best most of the time? what resolution?

This topic has been closed for replies.

Correct answer davescm

Yes there is a formula for working out the required resolution and it is all based on viewing distance.

With good eyes and good light the formula is :

Print resolution in ppi = 2/(distance x 0.000291)

where "distance" is the viewing distance in inches, and ppi is pixels per inch

Here is an article which discusses resolution requirements

What print resolution works for what viewing distance?

Dave

Bob_Hallam

Legend

Standard rule of thumb is 300dpi. Most images we get for large or grand format are 300dpi at 100% size because you can't guess viewing distance. For Grand and up 150 works for the very large graphics over 10 ft.

ICC programmer and developer, Photographer, artist and color management expert, Print standards and process expert.

davescm

Correct answer

Community Expert

Yes there is a formula for working out the required resolution and it is all based on viewing distance.

With good eyes and good light the formula is :

Print resolution in ppi = 2/(distance x 0.000291)

where "distance" is the viewing distance in inches, and ppi is pixels per inch

Here is an article which discusses resolution requirements

What print resolution works for what viewing distance?

Dave

ishfaque.bAuthor

Inspiring

all in inches?

davescm

Community Expert

Yes that formula uses inputs in inches and gives resolution in pixels per inch

Dave

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