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"Bob Hughes" <per### [at] aol com?subject=PoV-News:> wrote in message
news:3940b664@news.povray.org...
> "SamuelT" <STB### [at] aolcom> wrote in message
news:39406F80.31AAB373@aol.com...
> | Cool, it feels like I can fly right through it :)
>
> They are flying out of the screen at me. The red/cyan colors always
remain in
> these things when I look at them...
> ...Probably
has something to do with
> how wide a separation was used.
>
It's probably light leaking through the lenses of your glasses (red
through the blue/green lens and blue & green through the red lens). Have you
tried turning your monitor brightness down ?
--
Scott Hill. (sco### [at] innocentcom)
Software Engineer.
Author of Pandora's Box (coming to a web page soon(ish)).
*Everything in this post is IMO.*
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"Scott Hill" <sco### [at] innocentcom> wrote in message
news:394436a0@news.povray.org...
| "Bob Hughes" <per### [at] aolcom?subject=PoV-News:> wrote in message
| news:3940b664@news.povray.org...
| >
| > They are flying out of the screen at me. The red/cyan colors always
| remain in
| > these things when I look at them...
| > ...Probably
| has something to do with
| > how wide a separation was used.
| >
|
| It's probably light leaking through the lenses of your glasses (red
| through the blue/green lens and blue & green through the red lens). Have you
| tried turning your monitor brightness down ?
Gave that a try just now, both brightness and contrast higher and lower.
Shows most at medium settings, plenty still when darker and more contrast.
These 3D "glasses" are only cheap cellophane, and my eyes are of no help
either. When the color is all faded out it looks fine, if that's really the
word for it.
Bob
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<br> Hi Bob,
<p> First of all, this 3D-diamond image shows
"ghosts" even in my monitor, while I'm using my own glasses. For that I
mean this is not really a great 3D image. I don't think you can improve
it by changing contrast or brightness, since the problems are related both
to the hue and to the separation. I posted it here because it had something
to do with the "diamond subject" of this week and had this very strong
"flying through" effect.
<p> But, generally speaking:
<br> - For other images the color filters you have and
the color filters I use to prepare the images could be different. I use
red/blue glasses while creating images, some people use red/cyan glasses
to see them (or different intensities in the red and/or blue filters),
and then some 'ghosts' will show off, usually coming through the left (red
filter) eye. Besides that I adjust the images for my monitor colors. Since
there is no standard adjustment for colors (no absolute color scale, as
far as I know), some monitors can show a little more ghosts than others;
<br> - While creating the image you have a compromisse
between sharpness and how much the image is flying out of the screen.
<br> ( You control how much the image
is flying out of the screen by changing how much you displace the camera
from the left to the right position and by the positioning of the stereo
window. As someone else noticed, I disgraced the stereo window in
this image by the cropping I did while trying to reduce its size)
<br> I made some nice images,
very sharp (I mean, with no ghosts), but with little depth; others that
I made with a slightly bigger depth show these ghosts at the very deep
and very close (relatively to the observer) points in the image and
even tunning the colors independently for each filter (in my glasses),
I couldn't get rid of them.
<br> - When I look at the images from a bigger distance
I see less ghosts.
<br> - Finally, the jpg conversion does a good job in
increasing these ghosts, they are less intense in the tga file.
<p> A good thing for me
is that the ghosts are less noticeable in spinning images. I use flics
of rotating molecules to talk about inner structure in crystals.
<p> I added a png image (buckyball
arranged in a face centered cube) that shows absolutelly no ghosts (in
my system, with my glasses).
<br>Tell me what do you see in your system.
<br>Sorry for the size of it, but try to convert it to jpg (quality 100)
and compare the quality with that of the png.
<p>Best regards,
<p>
Ricardo
<br>
<p>Bob Hughes wrote:
<blockquote TYPE=CITE>"Scott Hill" <sco### [at] innocentcom> wrote in
message
<br><a href="news:394436a0@news.povray.org">news:394436a0@news.povray.org</a>...
<br>| "Bob Hughes" <per### [at] aolcom?subject=PoV-News:> wrote
in message
<br>| <a href="news:3940b664@news.povray.org">news:3940b664@news.povray.org</a>...
<br>| >
<br>| > They are flying out of the screen at me. The red/cyan colors
always
<br>| remain in
<br>| > these things when I look at them...
<br>|
>
...Probably
<br>| has something to do with
<br>| > how wide a separation was used.
<br>| >
<br>|
<br>| It's probably light leaking through the lenses
of your glasses (red
<br>| through the blue/green lens and blue & green through the red
lens). Have you
<br>| tried turning your monitor brightness down ?
<p>Gave that a try just now, both brightness and contrast higher and lower.
<br>Shows most at medium settings, plenty still when darker and more contrast.
<br>These 3D "glasses" are only cheap cellophane, and my eyes are of no
help
<br>either. When the color is all faded out it looks fine, if that's
really the
<br>word for it.
<p>Bob</blockquote>
</html>
Post a reply to this message
Attachments:
Download 'bucky.png' (125 KB)
Preview of image 'bucky.png'
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hi Harold
<p> I'm a violator! How can I sleep now?
<br> Seriously, my mistake was to brainlessly crop the
image in the wrong place while trying to reduce its size.
<br> It took 5h30m to render each image used to compose
the anaglyph. So, when I decided to put it in 640x480 I just cropped it,
instead of re-rendering. I'll be more careful next time.
<br> I think it took this long (2x 5h30m in a PII 350MHz
128Mb) because I insisted in using transparency, high refractive indexes
and high max_trace_level, while I could have used some simpler material.
<br>
<br> Well, take a look at my other image, the buckyball,
in this same tread ("a 'ghostless' image"), and tell me what do you think.
<p> Best regards,
<p> Ricardo
<p>Harold Baize wrote:
<blockquote TYPE=CITE>Very good, I like it. Nice concept and well executed.
<p>A stereophotographer might complain that it violates
<br>the stereo window. That is a term 3D photographers
<br>use to describe the situtation where an object is cut
<br>off by the edge of the image. You can shift the individual
<br>left and right images inward to move things back into the
<br>window frame. Then things in the center can project out in
<br>front of the screen, but objects at the edge can fall just
<br>behind the vitural window frame.
<p>Harold
<p>"Ricardo Michel" <sil### [at] gblcombr> wrote in message
<br><a
href="news:39406D40.6C090D23@gbl.com.br">news:39406D40.6C090D23@gbl.com.br</a>...
<br>> Hi, people
<br>>
<br>> This is my first post here.
<br>> It's a humble contribution to "the diamond subject".
<br>> Pick up your 3D glasses and take a look at it
<br>>
<br>> (remember:
<br>> the left lens over your red eye...
<br>> or something like that)
<br>>
<br>> Ricardo
<br>>
<br>>
<p>----------------------------------------------------------------------------
<br>----</blockquote>
</html>
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From: Bob Hughes
Subject: Re: A 'ghostless' image 125bu (was 3D-Diamonds)
Date: 13 Jun 2000 04:17:45
Message: <3945ee29@news.povray.org>
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Saved it as Jpg at a compression of 1 in PSP and it was alright I guess, a
little bluer through the red/blue glasses, and 10KB less is all.
This Png was real fine far as color, or lack thereof being all shades of gray.
Only about half the 3D depth I had expected though.
Bob
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On Mon, 12 Jun 2000 23:51:47 -0300 Ricardo Michel <sil### [at] gblcombr>
wrote:
><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
><html>
<snip.. 4.5k HTML post>
></html>
Plain text, please! Thanks in advance, Ricardo. A number of visitors
to this server, myself included, use newsreaders that do not decode HTML
without having to open up a web browser in addition to the newsreader.
--
Alan - ako### [at] povrayorg - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
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Sorry! I thought that after changing these settings once Netscape would
keep the changes. Seems it didn't happen. I'll check the format for (this
one and) the next posts.
Ricardo
Alan Kong wrote:
> On Mon, 12 Jun 2000 23:51:47 -0300 Ricardo Michel <sil### [at] gblcombr>
> wrote:
>
> ><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
> ><html>
> <snip.. 4.5k HTML post>
> ></html>
>
> Plain text, please! Thanks in advance, Ricardo. A number of visitors
> to this server, myself included, use newsreaders that do not decode HTML
> without having to open up a web browser in addition to the newsreader.
>
> --
> Alan - ako### [at] povrayorg - a k o n g <at> p o v r a y <dot> o r g
> http://www.povray.org - Home of the Persistence of Vision Ray Tracer
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The "stereo window" police will let you off with a warning
this time :-).
Ghostless image is great. No border so there can be no
window to violate- cool. Low contrast reduces ghosting,
even if poeple have faded anaglyph glasses. Nice image.
HB
------------------------------------------------------
"Ricardo Michel" <sil### [at] gblcombr> wrote in message
news:3945A61B.8F75D26D@gbl.com.br...
Hi Harold
I'm a violator! How can I sleep now?
Seriously, my mistake was to brainlessly crop the image in the wrong
place while trying to reduce its size.
It took 5h30m to render each image used to compose the anaglyph. So,
when I decided to put it in 640x480 I just cropped it, instead of
re-rendering. I'll be more careful next time.
I think it took this long (2x 5h30m in a PII 350MHz 128Mb) because I
insisted in using transparency, high refractive indexes and high
max_trace_level, while I could have used some simpler material.
Well, take a look at my other image, the buckyball, in this same tread
("a 'ghostless' image"), and tell me what do you think.
Best regards,
Ricardo
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Oh, I forgot to plug my web site. Visit
www.3dculture.com for some stereoscopic
photos and a few POV things too.
HB
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On Tue, 13 Jun 2000 13:38:27 -0300 Ricardo Michel <sil### [at] gblcombr>
wrote:
>I'll check the format for (this
>one and) the next posts.
Thanks, Ricardo.
--
Alan - ako### [at] povrayorg - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
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