3D Photography

Stereoscopy (also called stereoscopic or 3-D imaging) refers to a technique for creating or enhancing the illusion of depth in an image by presenting two offset images separately to the left and right eye of the viewer. These two-dimensional images are then combined in the brain to give the perception of 3-D depth. Besides the technique of freeviewing, which must be learned by the viewer, three strategies have been used to mechanically present different images to each eye: have the viewer wear eyeglasses to combine separate images from two offset sources, have the viewer wear eyeglasses to filter offset images from a single source separated to each eye, or have the lightsource split the images directionally into the viewer's eyes (no glasses required; known as Autostereoscopy).

Taking the pictures:
It is necessary to take two photographs for a stereoscopic image. This can be done with two cameras, with one camera moved quickly to two positions, or with a stereo camera incorporating two or more side-by-side lenses.

• Long base line monochrome stereogram anaglyphed for red-cyan filters.
• The viewpoint is from Dinosaur Hill Park above the city of Pleasant Hill, California. The image is of Lime Ridge in the center Shell Ridge to the right, with portions of Mount Diablo in the background.
• A single camera was used to capture two images, the second taken by walking about 100 ft (30 meters) after taking the first. When taking a picture like this it is important that the baseline is at right angles to the distant viewpoint and that the elevations of the cameras are identical. The latter is best achieved by walking along a contour of constant elevation. The two images were converted to grayscale and the left image used for red channel of final image, right image for green and blue channels, although the technique is not restricted to a monchrome production.
• The separation is insufficient to resolve the two peaks of mount diablo (not shown in this image). It appears that that would require at least a 100 meter (330 ft) baseline.
• Leonard G. made this image for the stereoscopy article.

Behance Network

The Behance Network is an online portfolio platform for creative professionals across multiple industries, including photography, graphic design, illustration, and fashion. Organizations such as the AIGA, Adweek, ADC, and MTV have partnered with the Behance Network to create galleries of creative work. They did a series of 3D images in Berlin.