pacificiam
Well-known member
What is relation between DPI, LPI & resolution?/
DPI, LPI & Resolution
- Thread starter pacificiam
- Start date
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
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http://www.gis.zcu.cz/studium/krp/screening_technology_eng.pdf
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Simon Ivarsson
Well-known member
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.
So, printing in 150 lpi the image should be in 300 dpi.
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.
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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
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
Well-known member
This link explains and illustrates the relationship:
Quality In Print: lpi/dpi
Scroll down to start at part 1
best, gordo
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