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04/03/2004 08:03:02 AM · #1 |
I can't help but notice that, with printers using dots, and digital images being made up of dots, that you could potentially achieve the highest print quality if you "lined up" the dots from the image with the printer's dots. Does that work?
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04/03/2004 08:39:16 AM · #2 |
Somewhat
Printers use much smaller dots than the pixels in an image (e.g., you send a 300 pixels per inch image to a printer that uses 1440 dots per inch to print it)
But, if you match up the ratio of PPI to DPI so that it is integer, you can get marginally better interpolation out of your printer driver - it has to do less work to convert your images into dots, there is less opportunity for softening and so on. The recommended PPI settings for different printers is usually based on this ratio - though the difference is usually very hard to see except for specific test cases.
Message edited by author 2004-04-03 08:39:32. |
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04/03/2004 05:19:34 PM · #3 |
Thanks, Gordon. I'll probably do a few tests of my own - I think I have some sheets of high res paper somewhere.
--
Edit: spelling.
Message edited by author 2004-04-03 17:20:23.
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04/03/2004 08:39:41 PM · #4 |
| Pixels on a monitor are generated from phosphors that can each range in value from fully off (black) to fully on (red, green, or blue), with hundreds of values in between. Dots on an ink jet printer are made from bits of ink that are either there (cyan, magenta, yellow, or black) or not (white), with nothing in between (some printers have additional light cyan and light magenta inks). To display a range of values, the printer prints lots of tiny dots for each pixel, a few dots for light values and lots of dots for dark values. That's why photo printers need a much higher resolution (in dots per inch) than photos (in pixels per inch). |
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04/05/2004 09:32:46 AM · #5 |
Thank you for the extra information. Would there be any point resizing my pictures before sending them off to be printed?
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