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Two approaches in the development of goggles-free 3D display systems

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Two approaches in the development of goggles-free 3D display systems
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A variety of applications, such as entertainment, medical, design and engineering, can significantly benefit from the development of a goggles-free 3D imaging system. Although a number of such systems (spatially multiplexed, volumetric, autostereoscopic and electro-holography) have been suggested, practically examined and modeled, their practical implementation is far from complete, mostly due to unsatisfactory imaging quality. Recent technological advances, both with hardware and data processing software, open a new perspective in the development of advanced non-goggles based 3D displays. Approaches of special interest include temporal multiplexing and point-aspects, as they offer a goggles-free solution to 3D imaging. In this paper, we discuss the initial results in the development of 3D displays with an improved image quality and increased refresh rate based on the new concepts, namely, temporally multiplexing and point-aspect. The paper presents a thorough review of the current state-of-the-art of these two techniques and a perspective in their further practical engineering and realization.
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let's look at the opening of putting this on a lot of time and make it clear what we do it's a growing demand result of understanding and respect all of the growing demand real time with in this operator can see immediately or of Europe and the immediately
image I'm not necessarily in what you what you but at least restricted audience and that's what I'm going to talk about the sounds a bit strange for me that after almost 30 years and called interesting I must say that this reckoned recognition of reality in problem not everything we can do it all over the hopefully 1 day we will but there is a strong demand and the lot of a lot of requirement and everybody who so Trek once the holiday almost impossibly but we still exist uh I would say we're trying to bring it 1 step closer and I'll talk about printed out and I will introduce to the system not much theory
just this and a depiction what system thus and what we do in that respect and the
right of the methods for displaying 3 D images result global that's an essential part you will often numerical rule-based systems unfortunately not always useful and not always possible for operators have on the global score and that's not display mounted head-mounted display it restricts motion and specifically in the internet independent when you think about thousands of people having goggles and all problems percentages and all the stuff that's not really convenient alignment people like you Gaming in this paper so they're must so all of these systems projects and images and they have to multiply so and time to see sequence of these images and it has traditional limitations and we're trying to overcome the what is needed as
I said before but there are last based systems head-mounted display shutter glasses single-user out stereoscopic and we have recently been discussion what is called stereoscopic it's becoming clear that whatever results stereoscopic it was already belongs to all of the rest of the oldest stereoscopic based or system that you want on your head and the next generation of the display should would so what kind place that currently him now we have holographic
display that's the most advanced unfortunately the most difficult to realize in real time practical solution is unlikely in real-time development because of the processing Proc just month of the of the of the information of the processes and transfer reduction of intrinsic information among redundancy of the system immediately introduces additional problems related to the noise of the system and flickering effect and all that stuff so I I have my heart disease in my life of my 1 might be sure will let you display it's very effective very efficient but have deficiencies in the latency effects and problems of difficult so I so these out of stereoscopic systems then the really good about you you see strips of the of the wife and the masses and it gives you a feeling that it's unrealistic so we come to alter seriously politics and they have been demonstrated very well they have their own limitations like humans but they don't produce realistically boarding metric images like looking at the big cluster systems but without any books that is why we can the world a better we when this
perspective what we currently have in the art of 3 D Systems stereographic systems was lenticular barrier they allow you to look around and compact they have limited interaction so you can't really work was image which is very often necessary and that's the main area of real-time 3 D display consumer produce modulated grating LCD about 30 humans zone and seems to be large enough however limited interaction and a very cost the actuality I just told you what about the limitations and know very good but if you think that you can you need to and wants to come to the speed you can't really make a big system it's a very limited size during the period so we came to work out a stereoscopic display system which currently produces 6 of humans looking at the and the interface of these development and it should give you the possibility to look for some of the object large books scalable and the problem is that it's the metric I would say in this sense of physical dimensions and so what we
use we use temporal multiplexing that's generally simple technique developed at Cambridge by management problems 1 of the core calls there and what it does it has the LCD or any kind of the chapter that produce sequence of the images for left and right at such a speed that you just don't is all you know we can result something like 30 above that we don't this 1 produces that about 100 thousand years so you really don't see it's been very and that that has enormous advantage because it can produce a high resolution image with a high speed and the disadvantage of high frame-rate and corresponding boundaries but it's solvable with the upcoming technique and we'll talk a little about that a little later
principle of operation as I said before it produces this kind the multiplicity of this leads that's can in front of you and viewing zone and
try to see if I can so that's what has been established using Helsinki what we try to do at the moment that trying to use a better technology dm dt with a high pixel number and the high frequency and graphic GPU recently increase increase rate and rendering abilities and have been with computer that's kind new technology new things
that came recently how it works here you use of show something what we what we see here is the optical training with so just at this point we look at the sleep at the end of the what doing position and that is made for the regular now what you need to do you need to place red green and blue sequentially or simultaneously for the purpose of the call sequentially and there that you will see the sequence of literal position that's where you have velocities and
that's what the system that was as as you can see yeah just comes from
position to position and that's
how it works it's a fairly
straightforward system so what you were the result what you will see you will see the sequence of these images and it
produces good effect at the moment religion the shutter based approach when LCD from Cambridge University is used for efficient high-speed shuttle LCD shutter was applied of speed and high throughput meaning that you don't have much losses in a system and what we have we put in a phase 1 which is pretty short and this should be very effective in LCD projector of being in the projected that goes to the set of the optical trained and high-speed chapter in this period and then from the from the lens creatinine image so basically you will see the viewing zones here this is color differently and a real image of the object behind the New England and we
see if I can show what is that sequential work it's fairly simple you have left position virological and then a jump to the right eye position which should also result in time they they seems to come simultaneously however because of that I perceive them in a flash way with a very high speed you just don't result when you see the 2 images come into your eyes and you can move they have to see slightly around that like 3 3 views on you can go to a higher level you can have more
songs like 3 images or for images and they go sequentially obviously up and actually that advantage is that you may use it not for a single operator you may have 3 4 5 5 operator depending upon number of the of sleeps you have in addition to that what you can also do you can put a like system when you have a sequence of the monitor and every operator will have its own system not of would like to maybe it's not touch like you can't you can't really go and touch you will see it has projected in front of your eyes so you don't need any global system will produce this kind of image in front of you but you can't touch it sort of like a touchscreen so far which is also under development in Japan will so when it producing look around capabilities was not so this topic effect because here you have the care the images produced like to call the real and so the scope so if you if you all relate to all of them simultaneously then the computer what what is the reality when you see the the the image like a charter
synchronization that's so that that these were the the core of technologies you need to synchronize the operation of the shuttle was the operation of the and produce these images sequentially so it takes a by computing right it takes a synchronization and that's the kind at the core of the system there are several you should the core shot synchronization is 1 of the most important and then of course how the system will look like what we what we're currently using and IP design it's LED projector you may use telling you different colors talk about that later and it produces a light illumination go through the optical training in the frontal and synthesizing image somewhere here in the exterior
but where it comes from the LED illumination the
optical trendy DMG and would use controlled synchronically with and then control the shots so it's a little that is established inside of that in in the part of the system and produces the sequences to show it should show the images in the in observation plane deemed DA
is kind of the central core core of the problem of the system currently exists in about 10 kilohertz up new D. India 3 thousand lot about 16 kilohertz and that should be enough to produce 16 year involves at a high speed and full color I just don't forget that you produce this images sequentially so you really need a high-speed and full synchronization but but for very fortunately the system is on the market you can we can get them and we can buy them when they produce a very good content of modulated
light so you need to flush the slide high speed and again very fortunately it you fire brightness was defined on 2nd the front which is not very high speed can be pretend we just the obtained from the market
and the LED currently you can get them in 3 different lines red blue and green and Procomm
sorry producing a very good white collar at the center for the balance of the color is that is wearable that's not a big issue have just a matter of illumination obviously in this scheme downstairs and that the the right bottom corner shows you that you can get with the with the right sequence of the pulse duration you can get the right color for that and the brightness is good enough to produce 150 and years and CIA the government system so and that's also available and we
did we did come with optical design and anaphor generation we use just a simple optical and available the mother special design and we could produce a very good field of view some aberrations that the ages but it just helps them
and different and here is the image rendered rendering the display you see the sequence of the images which goes both in time and perspective I understand it's difficult to look at this image but it's rotation of the satellite and you see slightly different sequences might be better so
that's the 1st generation of design the very 1st step in a design when we just got a commercial and this year display and put them together different elements you just sit here and the viewer should be here so you will see this it's a table top small comfort system and that produces about 46 hearings on depending upon the
mode of operation and here you see the hybridization real
image of that up getting in its own world the real image than the viewing zone and the image different locations and position but so that's basically how we would how you would see the image in a full color
system and this is a sample of these images you see that there are slightly shifted to rest left and right producing more automatic effect of of but that's
basically broke water and the performances resolution which is about 60 800 by 600 with the image size I would say about 150 10 10 by a 10 centimeter by 10 centimeter long roughly and optimal optimal use distance about 840 knew what 84 sentences that has a typical for this system parameters it's of the GGE video connector and optical synchronization reverses control and that's
a perspective you basically what you see here is a prospective design of the system where you have a life engineer that illuminates the indeed very special like moderator both literally went through the rear projection lens to project the image interviewing on that's it field last here and you see that this the field of view troops to reach you will observe this field blends image as I said
we have 2 2 different approaches and that's very unfortunate but with this aspect . display it's a bit ironic I should come I should step that back in 1989 we had a big display conference when the Steve came and he reported his electrical over the if you might know many of you know electrical of if became a kind of the 2nd after rainbow for Steve and he put a lot of efforts to promote it and to develop it in not everything worked at if you want to but that was a big progress and there was some disagreement and then when in 19 hack 94 95 was that me in and that time of was said in the group in Bogota and Colombia would discuss the display issues and I said that I have some problems with Steve and I was very open with the 1 that receive approach in electrocorticography and I said I had this idea was 0 point blocking upon point like imaging system then it's should jump from this moment that's my idea so we had with to fight as a response we wrote a paper together and it's a bit ironic that no I worked with air force and I'm not at this stage of the Walt completely describe the system so the system was on the field when I was years but now it's there some restrictions but at perspective the main difference is that we will have a screen and the system and the role of the screen to combine these out a spectrogram so I would call it respect the spectral points special points that exists in this in a different areas in different domains of the 2 image to transfer this image interview and that's kind of a small demo that should tell you how it works because they will scan from this screen producing Inc the images both in time and in space and every point of the story of a strip of the screen produces slightly different images and that's how we should produce should come to that reality we are currently working on a demo of this system hopefully the demo should be accomplished in half a year so we will see what will happen my have to report more later I the jury was working with his group independently there was a point where we could change might look much of information but at least the early stage we we had a paper that put together
so in conclusion we get here the based 3 reason system to display was a color full-color imaging and that the NB has definitely advantages over any of the landmark array projection systems optical would begin to optical design would build the table system and currently working on on both for interface tool for this DMT-based projection system and aspect the base hospital point of all graphs system to so that's basically security questions xd as I we have a few questions at the back of this but if you want to make it more you you so what about the brightness of the image that's a good question but we're looking at 16 that's a maximal possible from the point of view of because you're restricted use the fact factors that angle of you how far you can go on and brightness estimation shows that we can go 216 reliable 32 you see the decline in figures and numbers here everybody believes that when it comes to much of my that's not what people like at the conference of about 32 is still a valuable the problem is that when you go to 32 then you really limited by the bandwidth of the system currently because we could even with 16 kilohertz the indeed there are still limitations in the number of units on you can do but please reserve elegy brightness and don't forget that you have a very narrow the angle well not very narrow it's not to see but the diffuser that you have a system it's in their of and if you this is going to need some instances with complete system isn't possible to produce this this area was once we have that graphed there yet but here here and can be used to for forward for you can do that that's your forced viewing if you would like to produce 16 humans on this so it should look quite fit position of the need to produce sequentially left right or left right violation repeated 16 because viewers yeah general and these fuels are always stable and it is necessary to have this high range depending on the left to do that is very true but it depends again what you would like to do you might have 16 new involved from the same position but if you would like really to have reality then you need to have the possibility to look around that means that you have to have Europe there have books and you have to look at that different positions that tells you that then this leads should move to the new position at the funeral the ceiling and he and literary material you should system you have very high speed at least 4 4 items in a menu legal I think it's important to just put it in context this display over here which is a different type of display seriously holographic display has 640 effective like boxes so you're talking about a real time display which at the moment using current technology could keep 16 like boxes that what you think perhaps of making 1 6 0 years of whether it would be a very relevant and very good question because we discovered that but what is needed for the industry and for for a variety of industries and the whole thing just military defense system and defense system particular we we know the situation only we know how many years has been done you know this is the fact that the Canadian military were injured by accident this is because of the limitations the 2 divisions you need real with the time of operation these kind of this is that there is no mutual possibility to produce this kind of really so that there is enough you will look at the different to you Mr. K I have just a 2nd generation of not mobility and that has to be brought and if you probably the and the direction is not just a single region models in direction that this year stereoscopic that in both directions however that 1 also has limitations from the from right because it's you know there right and every year there'd direction so it's kind compromise whenever you need something in real time then the value of this problem to problem solving the problem of the values of thank you very much and that means you go to the next presentation mentioned