[DUG] Resizing images

[Conor Boyd]

What I think you're seeing (without seeing your example) is the softness
introduced by most resampling algorithms (when used for downsampling).

Something like Bicubic Sharper in PS or Lanczos Kernel in Irfanview
might help.

However, most of these sharpening algorithms probably work better on
photographic images than they will on graphics.  Maybe a more "dumb"
program like Paint would resample a graphic better.  Or reducing the
color depth of the image before resizing will also help.

Post an example, and I'll see what I would do with it.

C.

-----Original Message-----
From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz]
On Behalf Of John Bird
Sent: Tuesday, 19 January 2010 11:15 a.m.
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Resizing images

More specifically - does the GIMP or any other resizing method allow me
to specify this?:

Where say an image with a a white background (the transparent colour)
meets a grey border, and the image is resized (especially if resized
smaller), there will be on this edge a new pixel that has part of the
grey border and 
the white background.   Most resizing operations will change the pixel
to 
light grey/cream whereas I want to tell it to either use the original
grey or the white background only for any pixels on the edge.

John

> The GiMP is always handy for image manipulation.  Generally I draw my 
> images in a really old version of Corel Draw, then use GiMP for 
> transparance, shadows and so on.
>


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