🚀 go-pugleaf

Tom_Ricardo@adobeforums.com wrote:
> 
> Ok, you mention resolution. I used the standard 72ppi which I believe is the problem. Can I go back into photoshop and re-sample my PSD's to like 300ppi? How would I do that. Then I just need to save as .TIFF and import to illustrator to add text, then just print correct? Thankyou so very much. This means a lot.
> 
You can certainly upsample your images in Photoshop (in the Image
Size dialog, with the "Resample Image" box checked), but the image
quality won't improve a whole lot -- basically you'll just turn
'jaggies' into 'blobbies'. While Photoshop's bicubic interpolation is
quite good at smoothing out large pixels while preserving what detail
is there, in going from 72 ppi to 300 ppi the program is in effect
'inventing' something like 95% of the image you see -- and it can't
add detail or sharpness that wasn't there to start with. For best
results upsample in steps; look at the file size in the dialog and
avoid increasing it to more than double at a time: e.g. 72 ppi -> 101
ppi, 101 -> 142, 142 -> 200 (I'd stop there, as 200 ppi is enough to
avoid noticeable jaggies if the job will be printed using halftone
screens in the 133- to 150-lpi range typical of offset printing).

There are some applications and Photoshop plug-ins available (e.g.
"Genuine Fractals" IIRC) that use fancy mathematical methods to
disguise a lack of 'real' data in an upsampled image, but none of
them can truly create something out of nothing. I realize it may not
be possible for you at this point, but the optimal solution would be
to rescan or recreate the raster artwork at a higher resolution,
before adding the text in a page-layout or illustration program.

--Odysseus