On Wed, Jul 8, 2009 at 8:45 AM, Patrick Horgan<phorg...@yahoo.com> wrote:
> The truth is that Gimp displays to you using your screen resolution, so if
> you originally created an image at 72dpi and 216x216 pixels and another
> image at 4800dpi and 216x216 pixels, Gimp will display them the same.
Sort of true, see below..

> While
> they look the same, if you look at image properties with <ALT><RETURN> or
> set the disply units to inches in the bottom border and move around the
> image, you can see the difference.  One is reported as 3" across and the
> other as .045" across.  The resolution is used by Gimp to translate to
> inches and inch derived units for you.
> If you go into image/resize, and only change the dpi, Gimp will report to
> you that the image is a different size in inches, but the pixels are not in
> any way changed.
> Various image file types like jpg and png store resolution and Gimp does
> store that for you.  Devices are supposed to scale the images so that on
> their display resolution they will appear the same size as in the images
> native resolution.  Some devices/software actually do this.

Like GIMP (toggle View->Dot for Dot off). When Dot for Dot is off,
GIMP displays the image at a scale matching the comparitive
resolutions of the screen and the image.

>  If you print
> something and it comes out the wrong size, some times you can open it in
> Gimp, change the resolution and resave.  The only change will be in the
> stored resolution, the file's image data is completely unchanged, yet it
> will now print a different size!
Gimp-user mailing list

Reply via email to