Stereographs consist of two nearly identical photographs or photomechanical prints, paired to produce the illusion of a single three-dimensional image, usually when viewed through a stereoscope. Typically, the images are on card mounts, but they may take the form of daguerreotypes, glass negatives, or other processes.
What is the purpose of stereoscope?
A stereoscope is a device for viewing a stereoscopic pair of separate images, depicting left-eye and right-eye views of the same scene, as a single three-dimensional image.
What is autochrome photography?
An autochrome is the result of an additive color process and is a unique photograph—a positive transparency on a glass support—with colors composed of minute grains of potato starch dyed orange, green, and blue-violet.
What is the fundamental principle of photogrammetry?
The fundamental principle used in photogrammetry is triangulation. By taking photographs from at least two different locations, so-called ‘lines of sight’ can be developed from each camera to points on the object.
What are stereoscopic pairs?
Two photographs with sufficient overlap of detail to make possible stereoscopic examination of an object or an area common to both. Dictionary of Military and Associated Terms.
What is an autochrome plate?
Autochrome plates were created by coating a sheet of glass with microscopic starch grains dyed red, green, and blue. These formed a screen of color particles. Carbon black was applied over the plate, filling in the spaces around the starch grains.
How does the autochrome process work?
The process, called autochrome, involved covering a glass plate with a thin wash of tiny potato starch grains dyed red, green, and blue, thus creating a filter. When the plate was flipped and exposed to light, the resulting image could be developed into a transparency.
