Re: Picture Size Question

In article <BpPeg.9142$lb.828154@xxxxxxxxxxxxxx>, fakedotjwlbal@xxxxxxxxxxx
says...

I have a related question... When I edit images from my Coolpix 3100,
Photoshop Elements shows size at 300 ppi. When I go to the resize command
on images from my new Canon S3 IS, it comes up as 180 ppi. The camera is
set at maximum resolution and superfine maximum file size. This doesn't
matter when I am reducing the resolution for website and e-mail use, but
what about images that are intended to be printed?


The basics are that the Resize dialog in Elements and Photoshop has two very
different modes determined by its check box named Resample.

If the Resample check box is checked, then you are resampling, and you can
change the dimensions of the image (pixels).... for example perhaps to 25%
dimension to make it be much smaller for web or email purposes. Resampling
drastically changes the image pixels in a non-reversible way.

If the Resample check box is NOT checked, then you are scaling for printing.
Then you CANNOT change the pixel dimensions (it is grayed out). You can
change either the ppi or the printed size in inches, and the other will
track it, and the dimensions in pixels WILL NOT CHANGE. Just specify the
300 ppi or whatever value you want for printing, and the printed inches will
change accordingly. For example, assuming a 2000 pixel dimension, you can
specify 300 ppi and get 2000/300 = 6.7 inches, or specify 200 ppi and get
2000/200 = 10 inches. Or, the usual way is to just specify the inches you
want, and get the corresponding ppi to do that. There is NO CHANGE to the
pixels whatsoever when scaling, so you can do this over and over to print
different sizes without ever changing the image pixels in any way

(Well, OK, saving the image multiple times as JPG is a very poor thing to
do, but the scaling itself does not affect the image pixels at all).

This should become very clear in the first few seconds of experimenting.

--
Wayne
http://www.scantips.com "A few scanning tips"

.

Relevant Pages

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