> 
> Is there a way to specify the resolution of the images created by
> POV-RAY?  I have created a couple of molecular graphics which look
> great on screen but when they are printed, they contain jaggies even
> though they were antialiazed.
> 
> Furthermore, when I open the TGA file in xv (or any other graphics
> program) it says the resolution is 72dpi.  I would like this to be at
> least 600dpi.  Is there a way to specify this in POV-Ray?
> 
> Any help is appreciated.
> 
> Mike

	I get nice results when I render with 1/3 the number of pixels compared
to the dots on the printer. Usually an image that looks good at 100
pixels per inch on the screen will be nice at 300 dpi on the printer and
about the same size. But of course you may like it better at 600 or even
1200 dpi : then it will be respectively twice and four times smaller. So
you'll need two or four times as many pixels to get the same size as it
was at 300 dpi.

	I use The Gimp to post-process my images : that's a lot to learn but it
beats the crap of anything else on Linux. Among other things you'll find
out how many pixels an inch you have right now, accounting for you
resolution and monitor size.

	Have fun.

	Jean M.

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> I know its the printing step that is the culprit, but I don't know how to fix it.  I
printed some images from xv and they look like crap compared to what I see on the
screen.  AFAIK screen
> resolution is always 72 dpi regardless of how big the monitor is.

	DON'T USE XV to print since it produces crapped ps files
when the image is big (from my experience, don't know why).
	Use The Gimp or other image manipulation system.


*** Nicolas Calimet
*** http://pov4grasp.free.fr

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Nicolas Calimet <pov### [at] freefr> writes:

> > I know its the printing step that is the culprit, but I don't know how 
> > to fix it.  I printed some images from xv and they look like crap 
> > compared to what I see on the screen.  AFAIK screen
> > resolution is always 72 dpi regardless of how big the monitor is.
> 
> 	DON'T USE XV to print since it produces crapped ps files
> when the image is big (from my experience, don't know why).

My interpretation of the behaviour of xv is that it resizes the image in
such a way that it fits on the screen. This limits the resolution (in terms
of pixels) to the resolution of the screen.

> 	Use The Gimp or other image manipulation system.

I second this.

Thomas

-- 
http://www.thomas.willhalm.de/ (includes pgp key)

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> >[Warp]
> >   My signature called HTML?!!!
> >   That's the worst offence anyone has ever said to me!!!
> 
> Looks like binary code to me. It sure isn't human readable :)

	You should compile his nice C source code and see the
result, which is expected from a signature code... I still have
trouble (after more than one year I first time saw Warp's msgs)
to understand how it works. Warp, did you participate to this kind
of "most infamous C code" contest or something like that ?


*** Nicolas Calimet
*** http://pov4grasp.free.fr

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Nicolas Calimet <pov### [at] freefr> wrote:
:> Looks like binary code to me. It sure isn't human readable :)

  Well, this is actually true. The string in the code is binary data
(basically a bitmap) with an offset so that the values are shifted to
printable characters (kind of same type of thing as uuencode or mimencode do,
but more simple).

: Warp, did you participate to this kind
: of "most infamous C code" contest or something like that ?

  I have participated in the IOCCC but have no big expectations (the results
are very late this year). The quality of the competition is too high for
me (much like in the IRTC).

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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On Tue, 14 Nov 2000 13:22:40 +0100, Nicolas Calimet wrote:
>
>> I know its the printing step that is the culprit, but I don't know
>> how to fix it. I printed some images from xv and they look like crap
>> compared to what I see on the screen. AFAIK screen resolution is
>> always 72 dpi regardless of how big the monitor is.
>
> DON'T USE XV to print since it produces crapped ps files when the
>image is big (from my experience, don't know why).

You have to check the "save at original size" box when saving to
postscript. Otherwise the image is saved at the same size as it is
displayed (which is limited by your screen size). I have successfully
converted 3200x2400 pixel pictures to postscript with xv (which
nicely fills an A4 page at 300 dpi).

	hp

-- 


| |   | hjp### [at] wsracat      |    -- Lutz Donnerhacke in dasr.
__/   | http://www.hjp.at/ |

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