TECHNOLOGY

Brahmanandachari.K115A20003

THE NEW DIMENSION OF ENTERTAINMENT

CONTENTSIntroduction3D imageProducing 3D films

◦Displaying 3D filmsAnaglyph system◦Polarization system◦ Interference filter technology

3D televisions◦Eclipse method◦Lenticular displays◦3D broadcast system

INTRODUCTIONA 3D or 3-D (three dimensional) image is a

motion picture that enhances the illusion of depth perception.

It is derived from stereoscopic photography,

a regular motion picture camera system is used to record the images as seen from two perspectives and special projection hardware and/or eyewear are used to provide the illusion of depth when viewing the film.

Television broadcasts and direct to video

3-D image ?In real life, when you view an

object, either eye sees a slightly different picture from the other due to a minute variation in the angle.

Based on difference between the views of both eyes ,brain can calculates the distance between you and the object, and perceive depth and see in three dimensions or 3D.

Producing 3d films• Producing 3d films

involves using two cameras(stereoscopic cameras).

• Videos are shot from two slightly different angles corresponding to average distance between human eyes.

• In animated films, the two views are generated from the computer models.

Displaying 3d filmsStereo scopic motion

pictures can be produced throgh a variety of different methods.

Anaglyph systemPolarization systemsEclipse methodInterference filter

technologyAutostereo scopy

Anaglyph systemIn an anaglyph two images are

superimposed in an additive light through two filters, one red and one cyan.

Anaglyph glasses use two different color lenses to filter the images. Most used colors are red blue.

Each colored lense absorb the corresponging color and cancel out the hued images

Anaglyph image

Polarization system In this two images are

projected onto the same screen through different polarizing filters.

The brain perceives the two different perspectives with different polarizations.

Then the interpret it as 3D image has depth.

There are two polarization system.

Linear polarizationCircular polarization

Polarized images

Linear polarizationtwo images are projected onto the

screen through orthogonal polarizing filters (Usually at 45 and 135 degrees).

Linearly polarized glassesA linear polarizer converts an

unpolarized beam into one with a single linear polarization.

Circular polarization Projected to the screen through

circular polarizing filters of opposite handednes

The QWP transforms circularly polarized light into linearly polarized light.

reald 3dIn the case of RealD a

circularly polarizing filter switch polarity many times per second.

Filter is placed on front of the projector lens.

one projector is needed.

Single 4K(4096 X 2160 resolution) projector displays two 2K (2048X858 resolution).

Real d 3d image

Interference filter technology

This is the classic 3D technology.

Dolby 3D system uses different wavelengths of colors (red, blue, green) for each eye.

Eyeglasses filter out the very specific wavelengths allow to see a 3d image

It require much more expensive glasses.

It is also known as spectral comb filtering or wavelength multiplex visualization

Interference filter tech.(contd.)

Recently Omega 3D/panavision 3D system uses this technology.

Use of more spectral bands per eye eliminates the need to color process the image.

Light energy and color balance is 50-50.

Used with white or silver screen.

Glasses are cheaper to manufacture.

Health effectso There are two effects of 3D film

that are unnatural for human vision.• Cross talk between the eyes.• Mismatch between convergence and

accommodation.o 12% of the people are unable to

properly see 3D images.o 30% of the people have very

weak stereoscopic vision.

3-D televisions In 3-D televisions also,

it shows the same image in two different locations, results a 3D image

In any 3-D displaying 3-D glasses plays a vital role. Based on this there different technologies are there,

Passive glassesEclipse methodAuto stereoscopy

(lenticular lenses without glasses)

Active glassesAnaglyph Polarization system

Eclipse methodGlasses use liquid crystal display

technology.They have infrared sensors to

connect wirelessly to television or display.

The picture alternates b/w the two sets of the same image .

Left eye blacks out when the right eye’s image appears on television and vice versa.

Brain cannot detect the flickering lenses.

Working of glassesSynchronization

between alternating images on the screen and LCD lenses in the glasses.

This is provided by the stereoscopic sync signal connector.

Other end of the cable plugs into IR emitter, which emits signals to 3-D glasses.

The connector operator using TTL logic.

Lenticular displaysFor this it doesn’t

require glasses to see.

Display is coated with lenticular film.

Lenticules are tiny lenses on the base side of the film.

Lenses direct the light from images to your eyes.

Each eye sees only one image.

Working of lenticular displays

Problems with lenticular displaysThe displays depend upon the

audience being in a sweet spot to get the 3d effects.

Motion sickness after watching a lenticular display.

3d-tv broadcast system3D tv broadcast system involves

three steps.Content generationCompression and transmissionStereoscopic and auto stereoscopic

displays

3d tv signalsStereoscopic

systems use a frame-sequential 3D signal.

Left and right frames are sent alternately sent to the display.

Real frame frequency halves the video frame frequency.

Frame compatibleThere are two ways multiplex to improve

picture quality and provide better balance between the V and H resolution.Side by sideTop and bottom

Side by side format Top and bottom

Advantages and disadvantages

applicationsHome entertainmentsComics Science and mathematics

◦Used to display scientific data sheets and illustrate the mathematical functions

◦Chemistry computer software uses

CONCLUSION

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