3D

SUMAN GHOSH (12)DEEPANJAN BISWAS (20)PARIKSHIT SAHA (15)SOURAV BHATTACHARYYA (28)

DisplayMovie

TV

PRESENTED BY

INDEX

• OVERV IEW

• 3D D I SPL AY TECHNIQUES– S T E R E O S C O PY

• ANAGLYPH• POLARIZATION• ECLIPSE METHOD

– AUTOSTEREOSCOPY• LENTICULAR SCREEN• PARALLAX BARRIER

• 3D GADGETS

OVERVIEW

HUMAN VISION & PERCEPTION OF 3D WORLD

• Human eyes are equipped with an absolutely amazing binocular vision system. For objects up to about 20 feet (6 to 7 meters) away, the binocular vision system lets us easily tell with good accuracy how far away an object is.

• The binocular vision system relies on the fact that our two eyes are spaced about 2 inches (5 centimeters) apart. Therefore, each eye sees the world from a slightly different perspective, and the binocular vision system in your brain uses the difference to calculate distance. Your brain has the ability to correlate the images it sees in its two eyes even though they are slightly different.

PRINCIPLE OF 3D DISPLAY

• Main concept behind 3D display is to generate a sense of variation in depth. To achieve this, two perspective of a single image, each for one eye, is used. The principle is to send an individual image to each eye. our eyes can correlate these images automatically because each eye sees only one of the images.

3D TECHNIQUES

ANAGLYPH

In this system, two images are displayed on the screen, one in red and the other in blue (or green). The filters on the glasses allow only one image to enter each eye, and your brain does the rest. DRAWBACK: You cannot have a color movie when you are using color to provide the separation, so the image quality is not nearly as good as with the polarized system.

3D TECHNIQUES

POLARIZATION

Two synchronized projectors project two respective views onto the screen, each with a different polarization. The glasses allow only one of the images into each eye because they contain lenses with different polarization.

DRAWBACK: It's very difficult to use the polarization technique for home theater systems -- most methods would require you to coat your television screen with a special polarizing film first.

3D TECHNIQUES

ECLIPSE METHOD: Liquid crystal shutter glasse are used in conjunction with a display screen.Each eye's glass contains a liquid crystal layer which has the property of becoming dark when voltage is applied, being otherwise transparent.

The glasses are controlled by an infrared, radio frequency, DLP-Link or Bluetooth transmitter that sends a timing signal that allows the glasses to alternately darken over one eye, and then the other, in synchronization with the refresh rate of the screen.

Meanwhile, the display alternately displays different perspectives for each eye, using a technique called alternate-frame sequencing, which achieves the desired effect of each eye seeing only the image intended for it.

3D TECHNIQUES

ACTIVE SHUTTER CAPTURING

ACTIVE SHUTTER SCREENING

3D TECHNIQUES

Lenticular sheet

This method relies on a display coated with a lenticular film. Lenticules are tiny lenses on the base side of a special film. The screen displays two sets of the same image. The lenses direct the light from the images to your eyes -- each eye sees only one image. Your brain puts the images together and you interpret it as a three-dimensional image.

3D TECHNIQUES

• PARALLAX BARRIER• A parallax barrier is a device placed in front of

an image source, such as a liquid crystal display, to allow it to show a stereoscopic image without 3D glasses. Placed in front of the normal LCD, it consists of a layer of material with a series of precision slits, allowing each eye to see a different set of pixels, so creating a sense of depth through parallax in an effect similar to what lenticular printing produces for printed products.

3D GADGETS & APPLICATIONS

3D MOVIE • CLASSIC ANAGLYPH TECHNIQUE

• POLARIZATION TECHNIQUE

3D CAMERA • MULTI-VIEW & LIGHTING INTENSITY GRADIENT ALGORITHM

• ACTIVE SHUTTER

3D GAMING • ACTIVE SHUTTER GLASS• (NVIDIA 3DVISION GPU)

3D TV • AUTOSTEREOSCOPY• ACTIVE SHUTTER

GLASS