Inculcate Smartly "Teaching With a Difference": What is Stereoscopic 3D?

Hi all!!!!

"Good Afternoon"

"Welcome again with something new in store, Hope you are all enjoying sunday,

Today we'll talk about Stereoscopic 3D or 3D imaging......

We all go and see many 3D movies with the help special goggles consisting of red and cyan lenses....we are told to wear them before going inside the cinema hall....So what exactly we see?

Friends, A 3D stereoscopic is the illusion of depth in a two dimensional image. And it is an illusion. It involves presenting two images of the same subject, each from a different position, then tricking the brain into merging these into one. This happens by showing each eye a different image.

We can demonstrate it with the help of following example:

Place your finger at a distance from your eyes, now look at it with the help your eye(one at a time and closing the other), what we will see is that the two different angles have been formed when we look from left and right eye respectively. It seems that we are looking at two different pictures, but our brain take it as one single image. This is the base of stereoscopic images and movies.....What we is simply click two different pictures with two different cameras of same object at two different angles and then present it to our eyes.....and 3d glasses helps us viewing these images and then our brain does the rest...

Lets talk about some of its history,

The word stereoscopy derives from the Greek "στερεός" (stereos), "firm, solid"[9] + "σκοπέω" (skopeō), "to look", "to see".

Stereoscopy creates the illusion of three-dimensional depth from images on a two-dimensional plane. Human vision uses several cues to determine relative depths in a perceived scene.

Stereoscopy is used in photogrammetry and also for entertainment through the production of stereograms. Stereoscopy is useful in viewing images rendered from large multi-dimensional data sets such as are produced by experimental data. An early patent for 3D imaging in cinema and television was granted to physicist Theodor V. Ionescu in 1936. Modern industrial three-dimensional photography may use 3D scanners to detect and record three-dimensional information.[7] The three-dimensional depth information can be reconstructed from two images using a computer by corresponding the pixels in the left and right images (e.g.,[8]). Solving the Correspondence problem in the field of Computer Vision aims to create meaningful depth information from two images.

Viewing 3D

Traditional stereoscopic photography consists of creating a 3-D illusion starting from a pair of 2-D images, a stereogram. The easiest way to enhance depth perception in the brain is to provide the eyes of the viewer with two different images, representing two perspectives of the same object, with a minor deviation exactly equal to the perspectives that both eyes naturally receive in binocular vision.

If eyestrain and distortion are to be avoided, each of the two 2-D images preferably should be presented to each eye of the viewer so that any object at infinite distance seen by the viewer should be perceived by that eye while it is oriented straight ahead, the viewer's eyes being neither crossed nor diverging. When the picture contains no object at infinite distance, such as a horizon or a cloud, the pictures should be spaced correspondingly closer together.

The side-by-side method is extremely simple to create, but it can be difficult or uncomfortable to view without optical aids. One such aid for non-crossed images is the modern Pokescope. Traditional stereoscopes such as the Holmes can be used as well. Cross view technique now has the simple Perfect-Chroma cross viewing glasses to facilitate viewing.