Sorry for this late reply.
3 example online:
A. www.PenangA1.com/png/1K.PNG
B. www.PenangA1.com/png/4K.PNG
C. www.PenangA2.com/png/ORI.PNG
The three examples above are fragments of a drawing that terragen
produced just a few days ago.
All three pictures were taken by the same screen capture program.
If you take a look at Picture C (ori.png), it's from the original
drawing ( resolution: 4096 X 3072 ), with file size of 37MB, in BMP
format. In Picture C you can see patches of green leaves distinctly,
arising from the brown wall.
Picture B represents a screenshot fragment of the 37MB drawing as my
desktop wallpaper (1024 X 768). As you can see from Picture B,
although much smaller than Picture C, the patches of green leaves are
still separated from the brown wall.
However, if you look at Picture A ... the patches of green leaves
kinda melt into the brown wall behind it. Picture A was from a
fragment of a 1024 X 768 picture (JPG format) that I shrunk from the
original 37 MB BMP drawing. When I shrunk it, I use 100% JPG quality,
with the "Lanczos" option.
The most im****tant thing is that comparing Picture A with Picture
B ... as you can see, even if Picture A and Picture B were obtained
from pictures with the same dimension ( 1024 X 768 ), albeit different
pictures, the green leaf patches of Picture B can still be clearly
seen, while Picture A, the green leaves and brown wall are all mixed
up.
Any comment ??
aruzinsky wrote:
> On Apr 29, 12:39=EF=BF=BDam, hsyq...@[EMAIL PROTECTED]
wrote:
> > Hello !
> >
> > I do computer graphics as a hobby, and have produced quite a number of
> > stunning graphics. Often time though, when I shrink the graphic to put
> > them online, they become blurred !!
> >
> > I do all kinds of computer graphics, from fractals to virtual
> > landscape, to sci-fi rendering, using softwares ranging from photoshop
> > to terragen to povray.
> >
> > When I am satisfied with a certain creation, I often make a master
> > copy with the resolution of 8192 X 6144 pixel. Why that size? Because
> > that's the largest size my puny computer (dual-core 3GHz CPU running
> > XP with 4GB RAM) can produce within a reasonably timeframe. (Give or
> > take 8 hours for rendering).
> >
> > As the filesize for a JPG with 8192 X 6144 resolution may go up to 30+
> > MB, I often have to shrink them to a more reasonable 1024 X 768,
> > filesize about 800 KB or so.
> >
> > However, I found that when I do that, many interesting minute details
> > that were in the 8K X 6K pictures (even when I shrink fit it to my
> > 1024X768 desktop as wallpaper) are GONE. In the 1024 X 768 JPG files,
> > all those details become blurred. No matter it's a JPG ---> JPG
> > shrink, or BMP ---> JPG shrink, or TIFF ---> JPG shrink, all those
> > details are GONE !!
> >
> > I have experimented with many different graphic / photo softwares in
> > the shrinking process, all of them give me the same "blurring" effect.
> >
> > Now my questions to all you Gurus as below ---
> >
> > 1. =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD
=EF=BF=BD=
Can you tell me of the best way to shrink a 8192X6144 size graphic
> > to
> > =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD
=
=EF=BF=BD 1024X768 size graphic without losing the interesting details?
> >
> > 2. =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD =EF=BF=BD
=EF=BF=BD=
Which software do you recommend to carry out the shrinking
> > operation?
> >
> > Thank you all in advance !!!
> >
> > Sincerely,
> > Lee
>
> Instead of excess verbosity, you should post links to crops of before
> and after images showing the problem areas.
>
> You (plural) are not entitled to ignore the adage, "A picture is worth
> a thousand words."
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