advice for viewing anaglyph movies
Posted: Wed Oct 21, 2009 10:24 pm
Hi all,
This thread is for any advice you might want to share about viewing anaglyph movies but I wanted to start it particularly since I've had major ghosting of green/magenta 3d movies on my DLP projector - a viewsonic PJ503D. I whould classify it as unwatchable on the DLP even though it was good on my CRT and my LCD screens so what was the problem and what was the solution? Also, I'll bet others have had the same issue since other movies like Coraline are also green/magenta and I expect more to come. Anyway...
For a DLP projector:
1) Don't use "Presentation" mode, and
2) Use your computer to play the anaglyph DVD instead of a DVD player.
For some reason, the computer gives much less color-ghosting than my DVD player. It might just be color leakage in the composite cable. As for Presentation mode, the projector adds in some green to the image even if you fill your screen with pure magenta using Paint or another program. The way to detect that is to twirl a white pen on a string in your DLP projector's beam and see the colors that show up in the air where the pen is spinning. For a magenta screen, you should only see blue and red but Presentation mode adds some green to make the image brighter at the expense of color faithfullness. This means that for a green/magenta anaglyph, the magneta view will have some green in it that your "green" eye will see. Your green eye will see some of the image meant for only the magenta eye. In practice, it depends on the scene and so sometimes Presentation mode will be OK but from my test-run last night of green/magenta "Journey to the Center of the Earth", I recommend starting with Photo mode with brightness/contrast settings of 40/60 and adjusting from there. Other than green/magenta, I believe Presentation mode should be OK for red/cyan and yellow/blue or colortone.
There were still some scenes with bad ghosting but it was watchable and much better than with the DVD player. I even think that some scenes are very good after your eyes get used to it. Anaglyph has grown on me a little but I still prefer frame-sequential shutterglass.
Color calibration advice?
I've read that it's the glasses that need to match the display colors and you can't really adjust the display colors to match the glasses but watching the movie last night, lowering brightness/contrast did help reduce ghosting some to make a more solid image. I suggest pausing the movie at certain scenes and adjusting from there. You could try to use an anaglyph test image I made but I don't really have detailed instructions for use. Just try to minimize wrong-eye ghosting. I think it's more useful for comparing various glasses you might have instead of actually using it to adjust your display. I'ld hate to have people use it and feel like they've wasted their time with it. Anyway, I put it in another thread since there's one about calibration already:
http://www.mtbs3d.com/phpBB/viewtopic.p ... ion#p31717" onclick="window.open(this.href);return false;
Other advice? That's up to anyone else to add.
--- iondrive ---
This thread is for any advice you might want to share about viewing anaglyph movies but I wanted to start it particularly since I've had major ghosting of green/magenta 3d movies on my DLP projector - a viewsonic PJ503D. I whould classify it as unwatchable on the DLP even though it was good on my CRT and my LCD screens so what was the problem and what was the solution? Also, I'll bet others have had the same issue since other movies like Coraline are also green/magenta and I expect more to come. Anyway...
For a DLP projector:
1) Don't use "Presentation" mode, and
2) Use your computer to play the anaglyph DVD instead of a DVD player.
For some reason, the computer gives much less color-ghosting than my DVD player. It might just be color leakage in the composite cable. As for Presentation mode, the projector adds in some green to the image even if you fill your screen with pure magenta using Paint or another program. The way to detect that is to twirl a white pen on a string in your DLP projector's beam and see the colors that show up in the air where the pen is spinning. For a magenta screen, you should only see blue and red but Presentation mode adds some green to make the image brighter at the expense of color faithfullness. This means that for a green/magenta anaglyph, the magneta view will have some green in it that your "green" eye will see. Your green eye will see some of the image meant for only the magenta eye. In practice, it depends on the scene and so sometimes Presentation mode will be OK but from my test-run last night of green/magenta "Journey to the Center of the Earth", I recommend starting with Photo mode with brightness/contrast settings of 40/60 and adjusting from there. Other than green/magenta, I believe Presentation mode should be OK for red/cyan and yellow/blue or colortone.
There were still some scenes with bad ghosting but it was watchable and much better than with the DVD player. I even think that some scenes are very good after your eyes get used to it. Anaglyph has grown on me a little but I still prefer frame-sequential shutterglass.
Color calibration advice?
I've read that it's the glasses that need to match the display colors and you can't really adjust the display colors to match the glasses but watching the movie last night, lowering brightness/contrast did help reduce ghosting some to make a more solid image. I suggest pausing the movie at certain scenes and adjusting from there. You could try to use an anaglyph test image I made but I don't really have detailed instructions for use. Just try to minimize wrong-eye ghosting. I think it's more useful for comparing various glasses you might have instead of actually using it to adjust your display. I'ld hate to have people use it and feel like they've wasted their time with it. Anyway, I put it in another thread since there's one about calibration already:
http://www.mtbs3d.com/phpBB/viewtopic.p ... ion#p31717" onclick="window.open(this.href);return false;
Other advice? That's up to anyone else to add.
--- iondrive ---