Anaglyph 3D

Anaglyph 3D is the stereoscopic 3D effect achieved by means of encoding each eye's image using filters of different (usually chromatically opposite) colors, typically red and cyan.

cross-view prismatic glasses with adjustable masking have appeared, that offer a wider image on the new HD video and computer monitors.

Originally shot and exhibited using the Polaroid system, Creature from the Black Lagoon was successfully reissued much later in an anaglyph format so it could be shown in cinemas without the need for special equipment.

At present the excellent quality of computer displays and user-friendly stereo-editing programs offer new and exciting possibilities for experimenting with anaglyph stereo.

His "Deep Vision" system replaced the original camera lens with two color-filtered lenses focused on the same film frame.

The two images are usually positioned in the compositing phase in close overlay registration (of the main subject), and are then combined using an additive blend mode.

For example, if a depth finding algorithm takes cues from image brightness an area of shadow in the foreground may be incorrectly assigned as background.

Red-cyan filters can be employed because our vision processing systems use red and cyan comparisons, as well as blue and yellow, to determine the color and contours of objects.

Where traditionally, this has been a largely black & white format, recent digital camera and processing advances have brought very acceptable color images to the internet and DVD field.

Better quality molded plastic glasses employ a compensating differential diopter power to equalize the red filter focus shift relative to the cyan.

improved by manufacturers providing secondary paired lenses, fitted and attached inside the red-cyan primary filters of some high-end anaglyph glasses.

They use carefully balanced cyan (blue-green) acrylic lenses, which pass a minute percentage of red to improve skin tone perception.

A contrast-balanced view of the stereo pair and color charts is evident in the resulting (ACB) processed anaglyph image.

The displayed hues and intensity can be subtly adjusted to further improve the perceived 2D image, with problems only generally found in the case of extreme blue.

In the United Kingdom, television station Channel 4 commenced broadcasting a series of programs encoded using the system during the week of November 16, 2009.

Developed by TriOviz, Inficolor 3D is a patent pending stereoscopic system, first demonstrated at the International Broadcasting Convention in 2007 and deployed in 2010.

The 3D (Z axis) depth effect is generally more subtle than simple anaglyph images, which are usually made from wider spaced stereo pairs.

The use of more spectral bands per eye eliminates the need to color process the image, required by the Dolby system.

Evenly dividing the visible spectrum between the eyes gives the viewer a more relaxed "feel" as the light energy and color balance is nearly 50-50.

[27] Although DPVO dissolved its business operations, Omega Optical continues promoting and selling 3D systems to non-theatrical markets.

Thus the filters enable each eye to see only its intended view from color channels within the single anaglyphic image.

The American Amblyopia Foundation uses this feature in their plastic glasses for school screening of children's vision, judging the greater clarity as a significant plus factor.

Plastic glasses, developed in recent years, provide both the diopter "fix" noted above, and a change in the cyan filter.

Using color information, it is possible to obtain reasonable (but not accurate) blue sky, green vegetation, and appropriate skin tones.

However, other stereo display methods can easily reproduce full-color photos or movies, e.g. active shutter 3D or polarized 3D systems.

The suggested adjustment is applicable to any type of stereogram but is particularly appropriate when anaglyphed images are to be viewed on a computer screen or on printed matter.

Since the advent of the Internet, a variant technique has developed where the images are specially processed to minimize visible mis-registration of the two layers.

Disney Studios released Hannah Montana & Miley Cyrus: Best of Both Worlds Concert in August 2008, its first anaglyph 3D Blu-ray Disc.

These techniques have been used to produce 3-dimensional comic books, mostly during the early 1950s, using carefully constructed line drawings printed in colors appropriate to the filter glasses provided.

Anaglyphy (including, among others, aerial, telescopic, and microscopic images) is being applied to scientific research, popular science, and higher education.