OPTICAL CAMOUFLAGE

PRESENTED BY:P.RAVINDRA,

P.SAIRAJENDRA.

AUDI SANKARA COLLEGE OF ENG&TECHNOLOGYGudur , Nellore(dt)

Optical camouflage create the illusion of invisibility that by covering an object with something projects the scene directly behind that object.

What is Optical Camouflage

Optical Camouflage uses the Retro-reflective Projection technology based on augmented–reality system.

Harry Potter's invisibility cloak is similar to optical camouflage technology.

PRINCIPLE If you project background image on to the masked object, you can observe the masked object just as if it were virtually transparent.

1. To use an object covered by retro-reflective material as a screen will cause reflection through angle 90 degrees.

2. To place a projector into a position optically conjugated with the observer's eye by using a half mirror.

3. To make the projector's iris as small as possible by using a pinhole. image is projected through pinhole.

The three key techniques of Retro reflexive Projection Technology:

image of avirtual object is projected through a pinhole image of avirtual object is projected through a pinhole image of avirtual object is projected through a pinhole image of avirtual object is projected through a pinhole. The

REQUIREMENTSA garment made from highly reflective material.

A video camera.

A computer.

A projector.

A special, half-silvered mirror called a combiner.

The cloak: Cloke is a retro-reflective material, create specular reflection . A specular reflection in which incident light rays and reflected light rays form the exact same angle with the mirror surface.

The retro-reflective garment doesn't actually make a person invisible to create an illusion, image from the background is Captured it requires a video camera, which sits behind the person wearing the cloak.The video from the camera must be in a digital format so it can be sent to a computer for processing. computer captured image stimulate reality and transform the captured image by applying image based rendering.The modified image is projected on to the material through projector iris diaphragm .

The system requires a special mirror to both reflect the projected image toward the cloak special mirror is called a beam splitter, or a combiner a half-silvered mirror that both reflects light and transmits light

THE COMPLETE SYSTEM

APPLICATIONS Doctors performing surgery could use optical camouflage to see through their hands and instruments to the underlying tissue.

Pilots landing a plane could use this technology to make cockpit floors transparent. This would enable them to see the runway and the landing gear simply by glancing down. Drivers backing up cars could benefit a quick glance backward through a transparent rear hatch or tailgate would make easy to know.

Tele existance

Haptic Display

Invisible Cloak

no augmented-reality system would be of much practical use if the user had to stand in a fixed location to avoid use head mount display.

There are two types of HMDs:

• optical see-through displays• video see-through displays

Optical see-through displays look like high-tech goggles, These goggles provide a display and optics for each eye, so the user sees the augmented reality in stereo. Video see-through displays, on the other hand, use video-mixing

technology to combine the image from a head-worn camera with computer-generated graphics.

CONCLUSION:

“God created us to create the things which he remains”

VOTE OF THANKS