There are different techniques to see images from the right or the left eye by the stereoscopic projection with some positive or negative aspects.
For the most part, 2 images are superimposed in the same space of the screen, so the separation of 2 signals could be necessary, before our eyes could perceive them. To this end, we use different techniques for the differentation of the light (wavelenght preceived for the color or different polarization) or other techniques with different timing for the right or left eye managed by syncronized system.

The anaglyphic system is very comfortable to show stereoscopic images.
Viewing anaglyphs through appropriately colored glasses results in each eye seeing a slightly different picture. In a red-blue anaglyph, for instance, the eye covered by the red filter sees the red parts of the image as "white", and the blue parts as "black" (with the brain providing some adaption for color); the eye covered by the blue filter perceives the opposite effect. True white or true black areas are perceived the same by each eye. The brain blends together the image it receives from each eye, and interprets the differences as being the result of different distances. This creates a normal stereograph image without requiring the viewer to cross his or her eyes.

The stereoscopy came to a turning point when new studies and new projection systems began. Now, projection began to use filters and polarized glasses. Thanks to great successful of some short 3D movies projected in theme parks and thanks to exponential growth of digital cinema (in projection and shooting phase), the projection technologies makes progress both on vertical tone projection (for instance Infitec-Dolby system) and polarized technologies (for instance RealD system).

The DCI (Digital Cinema Initiatives) is a joint venture of major motion picture studios, formed to establish a standard architecture for digital cinema systems The primary purpose of DCI is to establish and document specifications for an open architecture for digital cinema that ensures a uniform and high level of technical performance, reliability and quality. By establishing a common set of content requirements, distributors, studios, exhibitors, d-cinema manufacturers and vendors can be assured of interoperability and compatibility. This common set is called JPEG2000 (this is an image compression standard). This choice put an end to long quarrels about the quality of different codecs of projection server (hogh performing workstation) able to manage digital projectors with high resolution.

The server was born for the 2D cinema based on JPEG2000 codec, famous for its high quality, because it has no blocks effect in playback and better than other compression system. Then other new versions were released, more performing to allow all stereoscopic digital projection standard on JPEG2000: REAL D, XpanD, Sensio 3D, Dolby 3D, e dual-projectors 3D playback.

We have to consider that stereoscopic projection emphasizes the quality image perception because of psychological reasons and not technical. We mean that the perception of 2 different parallel images which reach the brain and they "deceive" it with real images. These images produce a reaction of overemphasizing. So, if the audience takes the glasses off, he can see how poor the image is in 2D version (we don't want to say that this poor quality is due to the double images that we see, but only to apparent light saturation and a larger noise perception in plain tones, etc...).

• Home
• About us
• 3D
• News
• Products
• Service
• Partner
• Contacts