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05/25/2003 08:08:08 AM · #1 |
What are dpi s?
Message edited by author 2003-05-29 20:32:32. |
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05/25/2003 08:49:23 AM · #2 |
| dpi (dots per inch) is more connected to printing and pre-press. For example when you are doing something for prepress, you should keep dpi resolution between 270 - 300 dpi for high quality prints. So when you are resizing you images try do not oversize image by going lower than 250 dpi. |
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05/25/2003 01:08:03 PM · #3 |
Quite literally, dpi is dots per inch (or you can think of it as pixels per inch). It is like resolution, but it is relative to a specific size. For example, if your coolpix 2500 spits out a 1200 x 1600 image, and you want to create a full frame 8 x 10.66 inch print your print would be at 150 dpi (1200/8=150 and 1600/10.66=150).
Of course more dots per inch produce higher quality prints.
Higher resolution will produce a higher dpi print, but you cannot determine what a certain resolution will equal in dpi until you know what the size print will be.
(And for reference purposes, computer monitors generally display images at about 72dpi, depending on the monitor size and resolution setting.) |
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05/25/2003 05:03:46 PM · #4 |
Originally posted by wingy:
(And for reference purposes, computer monitors generally display images at about 72dpi, depending on the monitor size and resolution setting.) |
This is true, and I find that a lot of photographers save their web images at higher than 72 dpi, which doesn't do you any good. I always keep my web images separate and different from my images intended for printing (which can/should be saved at a better resolution). |
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05/25/2003 05:17:33 PM · #5 |
I did this test with the Fuji Frontier. I had two images printed: One great big one at 72 DPI and one at 300 DPI resized to 4 X 6. I couldn't tell the difference. In the first case I guess the machine did the math and in the second case, I made the adjustments. I concluded that I shouldn't bother.
Correct me if I'm wrong.
Thanks. |
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