seminar on 3d technology
DESCRIPTION
A presentation based on 3D technology in movies, it's evolution and current application.TRANSCRIPT
History
• 1980: William Friese Greene obtained first patent
• 1900: 3D camera by Frederic Eugene Ives• 1915: Tests in Astor Theater, New York city by
Edwin S Porter and William E via Red-Green anaglyph
• 1922: Earliest confirmed 3D movie “The power of love” in Ambassador hotel theater Los Angeles.
History
• 1922: Teleview system- alternate left right images projected synchronized with arm rests of seats.
• 1922: First Red-Blue anaglyph movie• 1936: MGM presented Academy Award and
Best short Subject award winning movie ”Audioskopiks”
Techniques
• Anaglyph• Polarization• Eclipse Method• Interference filter technology• Pulfrich• Spectral separation• Lenticular or barrier screen
Anaglyph
• Earliest method• Introduced in 1915• Superimposing two images, one left eye
oriented (RED) another right eye (CYAN)• Can be used in TV broadcasting easily• Actual color is not recreated successfully
Polarization
• Polarized at 45 degree and 135 degree (90 degree difference)
• RealD glasses• Circular polarization preferred over linear,
since viewer need not to align himself/herself according to the image orientation
• 4K projector projects 2K images on screen
Polarization
• Metallic screen makes it effective (silver screen), polarization not destroyed, introduced by Thomson Technicolor.
• It reduces overall image brightness and contrast.
Eclipse
• LCD Shutter glasses are used• Do not require silver screen• Brightness and contrast maintained• LCD valves the work by rotating the light
between two opposite polarizing filter• Expensive glasses
Interference filter technology
• Different wavelength of RED CYAN BLUE for each eye (Dolby 3D)
• Appropriate filters for each eye• PANAVISION introduced 5 filter per eye ove r
Dolby 3D• Claims to be cheaper than Dolby 3D and can
be viewed on almost all projectors and screens unlike Dolby 3D
Pulfrich
• Based on human eye sensitivity for different light intensity
• Body moves from left to right at some pace and left eye covered with darker lens
• It creates a two images illusion• Not widely used
Spectral Separation
• Uses holographic film in glasses that create dispersive prism like effect
• Causes “redder” objects perceived as near then “bluer” objects
Lenticular of Barriers
• Superimpose two images• Same sheet• Alternating strips• Screen having narrow lenses allows one image
to be shown at some particular angles (using parallax)
Lenticular of Barriers
• Lenses when made cylindrical reflects light at acute angle
• Viewer have to sit at an angle about 90 degree• Restricts number of viewers• Not widely in use
New Arrivals
• Without glasses• Autosterioscopic LCD screens• Introduced by “Sharp” in 2004• Autosterioscopic mobile screens by Japan in
2009 (Hitachi)• Gaming devices: Nintendo 3DS
New Arrivals
• A motion film standard• 70mm film projection• 8 stories high screen (silver light)• One of the best 3D experience
New Arrivals
• Cheoptics360 • Realistic holograms• Using pyramidal fog screen and multi
projection techniques