Using GIMP for images, but always have "blocky edges"

jonaskellens · 11-13-2009, 01:24 PM

Look at the image in attachment, it is saved in GIMP as png.

In GIMP itself, the border already does not look smooth.
When you look at the picture, you know why I can not put this on my website...

I have tried several settings when exporting the image to png (GIMP asks to export the image before saving), and this gives the 'best' result.

How can I smooth-en my image, and particularly the border and edges ?

Do I need something in GIMP hat works in the background and gives me a higher resolution for my images ??

EricTRA · 11-13-2009, 01:33 PM

Hello Jonas,

The reason why you have the borders and edges like that is because of the resolution the picture was taken. It's to low to have sharp edges. If you have a picture taken at a higher resolution, it would be bigger, but when you scale it to suit your needs, you'd keep a sharper image. If however you start with a low resolution then you cannot change it to a higher one as far as I know.

If you open an image in GIMP and go to the scaling option, you'll see a number followed by 'ppi' or so below the measurement boxes. That's the resolution the image is in. If there is an option to 'enhance' it, I stand corrected. I hope so, I'd like that too.

Kind regards,

Eric

jonaskellens · 11-13-2009, 01:55 PM

I don't open the image in GIMP. I open GIMP with a new file and then copy-paste the image.

Look at the image attached. I just started with a new fresh canvas and drew a circle...

So I start GIMP, File > new

It's as choppy as can be !

I do notice 72 ppi... X: 72000 Y: 72000 (advanced options)

Edit : changing this to the maximum possible does not change resolution of my circle.

pixellany · 11-13-2009, 02:29 PM

viewed on a computer monitor, a circle is always going to look like that---especially on an LCD.

Quote:

When you look at the picture, you know why I can not put this on my website...

I disagree---looks fine to me (at least at 1:1)

H_TeXMeX_H · 11-13-2009, 03:22 PM

Is this better ... made with inkscape.

smeezekitty · 11-13-2009, 03:28 PM

you need to antialias it.

jonaskellens · 11-14-2009, 03:32 AM

Quote:

Originally Posted by H_TeXMeX_H

Is this better ... made with inkscape.

When I open this in Firefox, it looks really great.

When copy-paste this into GIMP (even with 72ppi) it keeps looking great...

jonaskellens · 11-14-2009, 03:36 AM

Quote:

Originally Posted by smeezekitty

you need to antialias it.

Look at picture, antialias is enabled.

H_TeXMeX_H · 11-14-2009, 04:21 AM

Well then just use inkscape. I've never used GIMP for such a purpose ... making shapes or logos. I usually use GIMP for image enhancement, filters, screenshots, scaling, etc. For making logos or svg artwork use inkscape.

stu7 · 11-14-2009, 04:24 AM

Quote:

Originally Posted by jonaskellens

Look at picture, antialias is enabled.

OK then one thing everybody tried to say was_
Gimp, first thing, is a "raster" program - so, especially
for drawings like you show, this makes lines look "jagged".

But, like the other guy did... if you want something with
no jaggies at all, you need to use vector not raster.

jonaskellens · 11-14-2009, 05:15 AM

Quote:

Originally Posted by stu7

OK then one thing everybody tried to say was_
Gimp, first thing, is a "raster" program - so, especially
for drawings like you show, this makes lines look "jagged".

But, like the other guy did... if you want something with
no jaggies at all, you need to use vector not raster.

I am using Inkscape right now and things sure look smoother. Thanks.