Computer Graphics with Photoshop - Preferred PPI for transfer from raw to Photoshop

Author

Preferred PPI for transfer from raw to Photoshop

ronviers@gmail.com

2006-05-22, 10:16 pm

Hi,
Am I better off setting Canon's(bundled) raw converter to 2000 PPI
(max) and letting the, presumably, more sophisticated interpolation
algorithms in Photoshop make the changes to the printer's resolution?
Is it inherrently better to interpolate (extrapolate?) from a higher to
lower PPI than from a lower to higher?

TIA,
Ron

John McWilliams

2006-05-22, 10:16 pm

ronviers@XXXXXXXXXX wrote:
> Hi,
> Am I better off setting Canon's(bundled) raw converter to 2000 PPI
> (max) and letting the, presumably, more sophisticated interpolation
> algorithms in Photoshop make the changes to the printer's resolution?
> Is it inherrently better to interpolate (extrapolate?) from a higher to
> lower PPI than from a lower to higher?
>
As to the latter question, yes. Very yes.

I tend to convert from RAW at the default size, and shoot for 300 ppi
for printing. I don't try to interpolate upwards of that to try to match
the printer's dpi with the ppi I have set. It ends up that some of my
prints, due to cropping, have less than 300 ppi when output.

As to "rezzing up" in PS from 300 ppi to the supposed printers "native
resolution", I have read all kinds of nonsense, and some sense. Often
folks confuse ppi with dpi, which makes conversations less intelligent.

If anyone has done definitive testing on rezzing up over 300 ppi for
inkjet printers, I'd sure like to hear an estimate of what the
improvement is in your estimation, as long as it's a printer under $3000
US.

--
john mcwilliams