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join:2002-12-25
Plano, TX | reply to tmpchaos
Re: [Help] Increase DPI ? said by tmpchaos:The file size will stay the same, as will the pixel dimension, while the print size will change. Ok I downloaded PS CS2 and it does save it at 300 dpi but the image resolution doesn't reduce, (3872x2592) it is the same as the 72 dpi. And shouldn't the file size be big? It's only 2 MB in size? |
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Reviews:
 ·AT&T Southwest
1 edit | Pixel dimensions do not change when altering the DPI. Check the document size (inches). That is what changes. 
ETA: That's what I meant earlier with your output is already at the "max" pixels it is going to have (barring upsizing). Changing the DPI alters the print output (document) size only. You will still have the same pixel dimensions, regardless of what DPI you enter. |
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join:2002-12-25
Plano, TX | Oh I see. I was thinking they were the same thing. So for printing dpi makes a big difference? I guess it depends on how big of pic your printing? |
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Reviews:
·AT&T Southwest
| DPI only matters when printing. For on-screen stuff DPI is irrelevant (well not entirely, it affects file size I suppose).
DPI = dots per inch. The denser this is (e.g. the higher the dots per inch) the better the print, generally (unless you're going for that half-tone look).
So, for a 4x6 print at 300DPI you'd need a pixel size of 1200x1800. For the same print at 150DPI you only need 600x900.
The best DPI is that which your printer/lab wants, whether that be 150, 240, 300, 600, or whatever. |
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