output and dpi

[onium]

Hello,

I have noticed that when I save a 16bit TIFF the output is at 72dpi.
Is there a way to change the DPI on output?

Thanks, jeremy

[hardloaf]

Jeremy,

You can change default resolution assigned by RPP to new tiff files,
but this involves some Terminal work :)
For 500dpi:

1. Open Terminal (it's in Applications/Utilities)

2. Cut and paste this command:

defaults write net.tigry.rpp TiffXResolution 500

and hit Enter.

3. And again this one:

defaults write net.tigry.rpp TiffYResolution 500

and hit Enter.

This will tell RPP to assign 500 dpi to all new Tiff files.
You may change the value from 500 to any other of course, even with
fractions like 402.4 f.e.,
but keep them equal in both commands unless you know exactly what you
are doing.

Regards,
Andrey

[raul]

Dear Andrey,

Interesting information. I tried 300 and it turns out that I get a
smaller output file (mystery to me).

Would you care to explain why you prefer a default at 72?

If I use CS to change to 300dpi if the output file is 72dpi, a larger
size is the result. Is there any benefit/con to output at over 72? To
me it appears a drawback.

With very kind regards,

Raul

[hardloaf]

Raul,

This option doesn't affect output file size or it's resolution - it's
for final media resolution and for those applications which can handle
it properly. F.e. when set to actual printer resolution properly
configured Photoshop may display picture on screen in exactly same
size as it would look on paper.

When you change DPI value in Photoshop make sure that you have
Resample option unmarked - in this case it will not change pixel size
of the picture, but you'll see that it changes it's output size in
inches.

72 is just a historical default and some time ago it was close to
monitors resolution. Doesn't mean much anymore.

Regards,
Andrey

[raul]

Hello Andrey,

I tried again setting RPP at 300 and the file sizes are correct. I can
only think that I enterred an incorrect command at the Terminal.

Thank you.

With very kind regards

Raul

> > > > Thanks, jeremy- Ocultar texto de la cita -
>
> - Mostrar texto de la cita -