Archived from groups: rec.photo.digital (More info?
Realize that scaling and resampling are very different operations.
Also realize that image resolution in dpi, and printer quality settings in
dpi, are also very different things. Even if both are specified in dpi -
they are very different concepts.
You resample your image at the Image - Resize/Resample menu. In Irfanview,
this ALWAYS resamples, that is, it always changes your image to be
different dimensions in pixels (modify the dickens out of the pixels).
Those different pixels will then print a different size of course, but the
main idea is that you changed the pixel dimensions.
Or Irfanview menu Information - Resolution (Set) will scale the image to
print a different size on paper without affecting the pixel dimensions at
all. This is likely what you want to do to set a print size.
In many other programs, this choice of resample or scale is accomplished
in the same one resize dialog box, by checking or unchecking a Resample
The Irfanview Print menu also allows scaling too, to print some size in
inches, but which then does not show the new printing resolution dpi value
there. It changes dpi to scale the image, it just doesnt show the dpi
result. But you can know what it is by (pixel dimension) / (printed size
in inches) = printing resolution dpi.
On the Print menu, the dpi value at the left (next to Printer Setup) is
NOT about image pixels, not about the image at all, but instead is about
the printers print quality setting, and is about ink drops per inch
instead of image pixels per inch. It is a quality setting, comparing to
draft mode, normal mode, fine mode, etc. You can change it in the
Printer Setup button, and then Properties to enter the driver properties.
"A few scanning tips"