Proceedings of ieeeacm international symposium on mixed and augmented reality ismar 03, pp 348349. If you continue browsing the site, you agree to the use of cookies on this website. If youre more into retro fashion, theres also the optical camouflage technology developed by scientists at the university of tokyo. Optical camouflage uses the retroreflective projection technology, a projectionbased augmentedreality system composed of a projector with a small iris and a retroreflective screen. Retroreflective projection technology free download as powerpoint presentation.
In theory, if the projected images on the retroreflective screen are at infinity or far away from the cameras, the projected images will seamlessly. This paper describes the creation of invisibility with the help of technologies like optical camouflage. Optical camouflage uses the retroreflective projection technology, a projection based augmentedreality system, composed of a projector with a small iris and a retro reflective screen optical camouflage using meta materials. Pdf optical camouflage using retroreflective projection technology. In our new setup, our aim is to construct a system.
We present physical interfaces that change their appearance through controlled transparency. For instance, pilots landing a plane could use this technology to make cockpit floors. The actual applications for optical camouflage, however, are far less out there. It contains three videos demonstrating it in action. Index terms optical camouflage technology, retro reflective material, head. The conventional model of an optical camouflage system consists of a retroreflective screen, a projection source and a beam splitter. Document search support by making physical documents transparent in projectionbased mixed reality. This paper describes a kind of active camouflage system named optical camouflage. Optical camouflage uses technology rptxtal vision which uses optical projection, while using sthmdsee through head mounted display to blend virtual and real enviornments. Since visual active camouflage was the focus of this technical note, theses systems are presented in detail in the following subsections 2 to 5. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Optical camouflage using retroreflective projection.
Optical camouflage technology, retroreflective material. Retroreflective projection technology stereoscopy vision. The object that needs to be made transparent or invisible is painted or covered with retro reflective material. Kawakami n and tachi s 2003 optical camouflage using retroreflective projection technology proc. Then a projector projects the background image on it making the. Cnns chris lawrence takes a look at technology that aims to camouflage people in the military. Optical cloaking has been one of unattainable dreams and just a subject in fiction until recently. So if you were standing in front of a book shelf an i. Optical camouflage uses the retroreflective projection. These transparencycontrolled physical interfaces are well suited for applications where communication through optical appearance is sufficient, such as ambient display scenarios. Fictional cloaking devices have been used as plot devices in various media for many years. In proceedings 2nd ieee and acm international symposium on mixed and augmented reality, ismar 2003 pp. Visual camouflage consists of shape, surface, shine, silhouette, shadow, spacing and movement sen, 2002.
Changing the appearance of physical interfaces through. Optical camouflage using retroreflective projection technology. Pdf invisibility cloaking based on geometrical optics. Introduction optical camouflage is a kind of active camouflage. Invisible persons are seen in fiction stories only, but in the real world it is. Two projectors one for each eye are required to produce a. This is accomplished by manipulating the paths traversed by light through an optical material. The object that needs to be made transparent is painted or covered with retroreflective material. Several different approaches to cloaking have been proposed and demonstrated. The special fabric that tachis retroreflective projection technology depends on is covered in.
Optical camouflage uses the retroreflective projection technology. Telexistence is fundamentally a concept named for the general technology that enables a human being to have a realtime. One of the long cherished fantasies of humans has been to master. If you project background image onto the masked object, you can observe the masked object just as if it were virtually transparent. A technology pioneered by scientists at tachi laboratory, university of tokyo. Optical camouflage uses the retroreflective projection technology, a projectionbased augmented reality system composed of a projector with a small iris and a retroreflective screen. This paper presents a new type of optical camouflage system based on the retroreflective projection technology.
Active camouflage or adaptive camouflage is a group of camouflage technologies which would allow an object usually military in nature to blend into its surroundings by use of panels or coatings capable of changing color or luminosity. The operator will observe image of the object which is. Basically they overlay a video projection of what the background behind the object to be camouflaged looks like. In proceedings of the 2nd ieeeacm international symposium on mixed and augmented reality. Distributed camouflage for swarm robotics and smart materials. Hmp because the projection unit is an integral part of the helmet. Optical camouflage using retroreflective projection technology pdf. This cited by count includes citations to the following articles in scholar. Optical camouflage technology team members puneet rajiv deepak tiwari slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Viewer can observe the images projected on the retroreflective material occluded by the object which exists in front of the screen. The last one would be the most formal approach modifying electromagnetic field around an object to be cloaked with metamaterials. Telexistence and retroreflective projection technology. However, the space available for setting upmorewindows beenproposed 4. Autostereoscopic and multipleview display system using retroreflective projection technology. Mixed and augmented reality, 348349 ieee computer society, wachington, 2003.
However, over the entire spectrum, a cloaked object scatters more than an uncloaked object. Proceedings of the 2nd ieeeacm international symposium on mixed and augmented reality. Invisible persons are seen in fiction stories only, but in the real world it is proved that invisibility is possible. A notforprofit organization, ieee is the worlds largest technical professional organization dedicated to advancing technology for the benefit of humanity.
This paper describes a kind of active camouflage system named. Tachi, visuohaptic display using headmounted projector, proceedings of ieee virtual reality 2000, pp. Optical camouflage uses the retroreflective projection technology, a projectionbased augmentedreality system composed of a projector with a small iris and a. They transition between perceived shapes within milliseconds, require no mechanically moving parts and consume little energy. Optical camouflage uses the retroreflective projection technology, a projection based augmentedreality system composed of a projector with a small iris and a retroreflective screen. Active camouflage or adaptive camouflage is a group of camouflage technologies which would allow an object usually military in nature to blend into its surroundings by use of panels or coatings capable of changing color or. The same coat seen though the halfmirror projector part of the retroreflective projection technology. For now, however, the technology only works in two dimensions and only comes in the ultrapetite size of 10 micrometers across.
Optical camouflage uses the retroreflective projection technology, a projectionbased augmentedreality system. Tachi, optical camouflage using retroreflective projection technology, in proceedings of ieeeacm internat. In such a setup, the user needs to observe an object covered with the retroreflective screen through a single viewpoint. An active camouflage system would account for all of these aspects. You can forget hiding your romulan starship or hanging out in the lady wizards dormitory, but that doesnt mean there arent a number of viable uses for the technology. Optical camouflage technology, retroreflective material, head mounted projector hmp 1. Image based rendering and restore elective projection. Daisuke sakamoto associate professor of computer science and information technology. Autostereoscopic and multipleview display system using retroreflective projection technology article pdf available march 2012 with 94 reads how we measure reads. Pdf optical camouflage using retroreflective projection. Distributed camouflage for swarm robotics and smart. Retroreflective projection is a method used to create augmented reality that combines the virtual world with the real world. Zentgraf t, ulinavila e, genov d a, bartal g and zhang x 2008 threedimensional optical metamaterial with a negative refractive index nature 455 3769. Mike siekkinen writes this optical camouflage project is pretty interesting.