# Re: [Gimp-user] Re: the difference between resoloution and size

```Hi,
[EMAIL PROTECTED] (2006-03-19 at 2339.24 +0100):
> Hi!
>
> ... and is there any difference in picture if I set:
>
> 100x100 in 400dpi
> or
> 200x200 in 100dpi
>
> and make a print from it (in same size - 10cm x 10cm for example)?```
```
Then it is not 400 or 100 DPI, but (rounding to 1 inch = 2.5 cm) a 4
inch print, so you have printed 100 pixels to 4 inches and 200 to 4
inches too, so that was 25 and 50 DPI. Maybe you are confused with the
printer's DPI (300, 720, 1440...) but those are not pixels, but ink
dots. The print system has to convert the file/screen pixels (think
about them like squares or rectangles with different levels of
intensity) to ink dots which are on or off (one level of intensity, so
the printer creates patterns of dots to simulate the intensity levels
when looked from "far away").

> Thanks:
> Anti
>
> On Sun, 2006-03-19 at 23:10 +0100, GSR - FR wrote:
> > Hi,
> > [EMAIL PROTECTED] (2006-03-19 at 2348.25 +0200):
> > > what is the difference between resoloution and size?
> > > between a picture with height:100; width:100 and resolution:200 to
> > > height:100; width:100 and resolution:400 ?
> > > Udi
> >
> > Resolution is a hint for the real world print size and size is the
> > pixels you really have (assuming you are displaying width and height
> > in pixel units). So both have the same number of pixels, but one is
> > declared to be printed as 0.5 inch side square and the other as
> > 0.25. Some people get really picky about the resolution being correct
> > so they know the print size without doing maths, and others think that
> > changing the number will do magic and give you a non pixelated print.
> >
> > GSR

GSR

_______________________________________________
Gimp-user mailing list
Gimp-user@lists.XCF.Berkeley.EDU
https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
```
• Re: [Gimp-user] Re: the difference between resoloution and size GSR - FR