Subj : Re: Power Point
To   : JAY EMRIE
From : JEFF GUERDAT
Date : Fri Sep 16 2005 07:57 am

On 09-15-05, JAY EMRIE said to GORDON HUFF:


GH> GH>My computer club has an "InFocus" LP755 and it "automatically"
GH>interprolates
GH> GH>images to its native 1024x768 ... occasionally you see some artifacts.

GH> JE> Is that with text or photos?

GH> Yes.

JE>Maybe I should have said: Is that text or competition quality photos?
JE>After all this is for a Camera Club.

I haven't seen you acknowledge that virtually ANY projector the club can
afford is going to interpolate the display.  A 4MP camera/scan is something
like 2304x1728 (that's actually the image size of my wife's 4MP Kodak DX6490).
My film scanner scans at 5400dpi, leading to 8100x5400 images (if full frame
35mm).  Will the club ever afford a projector that can natively project at
even the lower resolution?  Will it be attached to a computer that can display
that resolution?  If the answer is "no" then it's a rather moot point - all
you can do is attempt to minimize the interpolation artifacts.  The use of
PicturesToExe has no bearing - Irfanview would be able to do the same thing
although the algorithms used to determine what data to throw out to reduce the
image to screen resolution may be different and, hence one *may* look better
than another if scrutinized closely enough (you'd never see it if doing a
slide show, especially if the projector can't resolve the image at a higher
rate, either).

It you're judging digital images, it should likely be on the basis of a print
from a good dye-sub printer, not a projected image.  If the projected image is
what you have to go with, you must accept the limitations of the device
displaying the image in the first place...


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