| Author | Message | ||
     David Blaize Rating: N/A |
Ok i got bored and decided to explain to everyone who doesnt already know the truth about the programs that do 2d to 3d conversion for video. Ok first, the 2d to 3d "real-time" converters out right now are sometimes questionable. Some of them just push the screen back or forward and give no actual depth to the objects or characters in the video, so i've heard but never actually seen one of these programs. But some of them just delay 1 or 2 frames in one eye and this produces what most experienced 3d users call "pulfrich" effect (see "PULFRICH" below). This is the same exact thing as delaying frames in one eye which some people think they can make suppossed "2d to 3d converter" get away with, like x3d's "pc gateway" and "tv gateway" software which they sell for a total of $350!!!! OMFG you can just go and buy sunglasses under $10 cover one eye and get the same effect watching regular tv. And whichever eye is covered, lets say left, then things will only appear 3d when things are moving horizontally in that direction(left). But there is a converter which i believe is superior to these programs that only delay in one eye and that is 3dplus 2.0 The reason why is because it does use the pulfrish methd but not in a typical sense. Since pulfrich 3d only works in one direction(left or right depeneding which eye has dark filter) the makers of 3dplus try to figure out a way that motion can be detected and it changes which eye has the delayed frame. This gives the opportunity to have 3d when things are moving left or right and saving you the trouble of switching a dark filter on your eyes when watching tv. Even though some people are not happy with 3dplus they should apreciate it more because it does more than delay frames in one eye and its only $50 from eDimensional. Now other than "real-time" converters, there are some convertors that use depth maps or generate depth maps automatically. 3DCombine is a program that uses depth maps and this process can take a long time to convert a video but can have better results than "real-time" which mostly uses pulfrich. When depth maps are used the entire image is shifted to the desired depth map setting and can give you any type of 3d effects you wish and also when things arent moving can still have depth, unlike the pulfrich method. The automatic depth map generator on 3dcombine uses motion in the video to create a depth map but sometimes this does not have desirable effects. And thats basically all that i know about 2d to 3d conversion for video. My conclusion is, if you want to convert a vidoe into TRUE 3d then use a depth map...and if you want to convert a video to 3d on the fly(real-time) then use 3dplus 2.0 If theres any other 2d to 3d video convertors that do not just delay frames in one eye, that only give 3d to things moving in one direction, or any other convertors that use depth maps then i would like to know what they are and please reply if you know any. PULFRICH: For the people who dont understand, the pulfrich method is when you cover one eye with any dark filter and watch a video/tv and this gives the appearance of depth...go ahead and grab some sunglasses and cover one of your eyes with one lens and watch a tv/video. You'll notice that in some parts of the video it appears to have depth, this works because the eye that is covered with a dark filter reaches your brain slower than the other eye that has no filter. So each eye is seeing two different images, one original and one delayed, and this gives us the 2 points of view that gives a 3d image, but the only way to get a perfect 3d effect is if the object or person is moving horizontally across the screen(ex. if the person is standing still then theres nothing to delay and both eyes with see the same FLAT image). Later people, Blaize | ||
| Christoph Bungert (Admin) Rating: N/A |
### My conclusion is, if you want to convert a vidoe into TRUE 3d then use a depth map...and if you want to convert a video to 3d on the fly(real-time) then use 3dplus 2.0 ### You can't convert into true 3D, not even manually. If it's converted it isn't true and it doesn't look true. 3dplus 2.0 still creates incoherent, erratic 3D effects. It's impossible to tell which frame is supposed to be for the left eye and which for the right eye. You can hit the reverse button on the glasses controller again and again, but can't determine which orientation is correct. The effects are ever changing - messy. With real stereo material you can immediately see which orientation is the right one. My conclusion is if you encounter any 2D-to-crap converted material run like hell - ALWAYS! Even with a good, professional 3D-camera (or virtual cameras in 3D-software) it's very, very hard to get good stereo, but without a 3D-camera? How silly. Christoph | ||
| Christoph Bungert (Admin) Rating: N/A |
http://www.stereo3d.com/3dplus_software.htm | ||
| Anonymous Rating: N/A |
###With real stereo material you can immediately see which orientation is the right one.### and with a depth map this is not true stereo??? | ||
| David Blaize Rating: N/A |
###My conclusion is if you encounter any 2D-to-crap converted material run like hell - ALWAYS!### Yes you are so right, maybe i should have said "if 2d to 3d conversion is really necessary..." Ok i was more tolerant of your opinions....now hear mine. If you re-read the post carefully you would see that its not about if 2d to 3d conversion is good....its a matter of which is the "best" out there but that doesnt mean its good. I'm sorry if you did not understand this. Many people in the 3d market always look into this 2d to 3d conversion category and i was just wanted to get the whole thing straight. Like 3dplus might have a lot of crap 3d parts but this is the BEST you can get for real-time conversion and compared to x3d's $350 conversion this is your best bet. Also x3d conversion only does one direction 3d horizontal movement, i would personally hate all the reversed 3d effects when things move in the opposite direction. And for NON real-time conversion your WAY better off using a depth map than having a crap(yes 3dplus does not even compare to depth map 2d to 3d) program that delays frames. I have been able to convert some videos with great out of the screen effects using depth maps and would be happy to convert one as a sample. So these are the only "best" ones out. Later, Blaize | ||
| Peter Wimmer Rating: N/A |
I absolutely agree with Christoph. Why should I watch a 2D->3D conversion that does look flat most of the time or causes eyestrain? A 2D videos should be watched as it was intended to be: 2D. Would you try to add movements to a photo and convert it to a video before viewing it? I guess no. So why add depth to a flat video? It does not work & makes no sense. | ||
| Peter Wimmer Rating: N/A |
> I have been able to convert some videos with > great out of the screen effects Of course it is possible to find a single scenes that can be converted to 3D quite well, but never a whole movie. And that's what would be necessary to make 2D-3D conversion useful. | ||
| David Blaize Rating: N/A |
OMFG how long will it take you to understand what this is for?! ###Many people in the 3d market always look into this 2d to 3d conversion category and i was just wanted to get the whole thing straight.## for THEM thank for the appreciation, Blaize | ||
| anonymoose Rating: N/A |
I've seen non real time 2D-3D conversions done by DDD and Another World that actually look decent. If you look closely you can tell they are not real stereo, that there is not usually a lot of depth, and that the images were warped to get the stereo effect, but they don't have the wierd effects that the real time converters produce. They are certainly good enough for casual entertainment. The reason is, of course, that the image manipulation is done frame by frame by humans who can tell from non stereo depth cues what is supposed to be in front and behind and about how far. | ||
| David Blaize Rating: N/A |
Exactly what im sayin...as far as suppossed "2d to 3d" conversion goes, this is as good as it gets. So if thats what you want...then go ahead with using depth maps...these do warp the video image a bit, but its better than seeing flat images 50% of the time and getting headaches. | ||
| RAGEdemon Rating: N/A |
Don't you just hate it when people dont read the post, but read what they THINK is the post. Thanks David, helped me alot... won't be spending much time on the 2d>3d conversion crap ;-) |
