DPI, LPI & Resolution

[pacificiam]

What is relation between DPI, LPI & resolution?/

 

[LoneGoose]

Here's a link to a good Heidelberg PDF that should clear that up for you:

http://www.gis.zcu.cz/studium/krp/screening_technology_eng.pdf

N

 

[Simon Ivarsson]

I was once told that the dpi should be at least double the lpi.
So, printing in 150 lpi the image should be in 300 dpi.

 

[LoneGoose]

I prefer, for the sake of clarity, "pixels-per-inch" when talking about digital images. Am interested to hear others' opinions on that...

pacificiam, this thread reminds me of how graphic designers will mention they have an image of 300dpi, 600 dpi etc. If I feel enthusiastic enough, I might ask 'so what, what are the PIXEL DIMENSIONS?' I find giving a mega-pixel value for image requirements a far more valuable guideline. 6 mega-pixels, for example, could be 2000 x 3000 pixels - enough for most applications. dpi / ppi of a digital image doesn't tell you anything about the size.

N

 

[PetePress]

What is relation between DPI, LPI & resolution?/

Have a look at this article;

LPI Lines per Inch - Measuring Halftone Resolution

And some formulas used

LPI Chart and LPI Formulas - Find the Best LPI for Printing Based on Paper and Purpose

There is even more on resolution etc...

 

[gordo]

What is relation between DPI, LPI & resolution?/

This link explains and illustrates the relationship:

Quality In Print: lpi/dpi

Scroll down to start at part 1

best, gordo