Tuesday, January 4, 2011

Acidosis Vasodilation

3D

The
Stereoscopic 3D photography attempts to replicate the feeling of deep natural stereoscopic vision. If we get two photographs with adequate separation, corresponding to the view you would get with each eye, and observed with an appropriate viewer, it is possible to recreate the feeling of depth, which lack conventional photographs.

was a Scottish physicist, Sir Charles Wheatstone, who in June 1838 with some rigor first described the phenomenon of three-dimensional vision and then built a device it could be seen in relief geometric patterns: the stereoscope.

Years later, in 1849, Sir David Brewster designed and built the first stereo camera, which won the first pictures in relief. Also built a lens viewer to watch. Later, Oliver Wendell Holmes, in 1862, built another model hand stereoscope became very popular in the late nineteenth century. With it could be raised stereoscopic photographs mounted on cardboard.

The stereoscopic film photography and manipulated the distance between the targets for greater detail, according to the distance of objects in focus. Indeed, greater separation between the lenses, the greater the distance that captures the attention. For example, for mapping taking pictures with 100 meters apart, which allows for an excellent assessment of the relief, impossible with the naked eye. On the contrary, to obtain relief images of small objects or microscopic reduces the separation of the lenses.

To natural observation, the distance between the lenses must be equal to the distance between the eyes. This has been applied in the first stereographic cameras (photography photochemical), and the machine Kodak (pictured above), which were sold until the year 1950 but for which the enthusiasm waned quickly because of the difficulties was the amateur photographer when watching the images.

ViewMaster The company manufactured a stereographic camera in 1930 and his records and stereoscopic viewers had widespread success until the 1960's.


Next, the new Sony digital camera stereographic, unveiled at CES 2011. Capturing 3D
today

3D pictures can be achieved in various ways. With a single camera can get the two images, in two stages, moving the camera a distance similar to the separation of the eyes, about 65 mm. The following photos shows the Novoflex device for successive shots with the same camera, belonging to the author and the device with the two camera positions. Special software "rides" after 3D image (see below).

Naturally, the subject should not move between the two jacks, for which this procedure is only for photographing stationary objects. If we get moving 3D pictures we use a special camera (with two lenses), a conventional camera equipped with a special attachment with mirrors or two simultaneously triggered cameras. Some cameras

normal (single lens) to respond quickly to current fashion offer to create 3D images with a single shot, using a pre-installed software that actually simulates the third dimension superimposed twice on the same original with a slight lateral displacement (come back to this method.)

Display

The main problem is the way to look at the pictures, so that each eye sees only the image it deserves. Viewers or stereoscopes allow an almost perfect but individual. The systems used in the screening of films to see three-dimensional images allow a large group of people, but requires them to wear special glasses. These can be of various types, but there are two that are competing in the market today:

  • Anaglyph: The combination of green and red filters to produce a single image
  • electromagnetic polarization, creating two versions of the image , polarized light at two different angles and the corresponding-polarizing filters on the lens, blocking the passage of polarized light 90 degrees to the plane polarizing filter.

  • television manufacturing companies now working in the development of screens "autostereoscopic" which do not require special lenses. They are aware that the market will prefer the TV without glasses and it is the way to the future of the television industry. Thus, while Toshiba has already announced (December 2010) a 3D TV without glasses, Apple Tamniès acquired a patent for 3D TV without glasses, which work through a camera that detects the position of the faces of the spectators and projects different images so that all would receive different 3D effects. Software for Photographers

    currently can be downloaded from the web Photomake Free 3D application. With it, you have to open the two original photographs (left and right) and then get the 3D product. Clearly the best way is to use the camera with a device like the Novoflex we have shown here, otherwise you have to move a little tripod (always recommended). To fully appreciate the depth, it is convenient to work with scenes in which the variation of the planes is visible. Not effective for landscapes, unless you have good close-ups. Here's an example where note the depth is particularly well (anaglyphs glasses required).


    using editing software like Photoshop, from a single photo can create two images, as shown here, the original cutting sideways and then the other (the difference is unremarkable here, but capital):













    Applying 3D Photomake then we got the following image:


    Another example:


    This procedure is one that can be incorporated in digital cameras today offer a 3D function without two lenses.

    do on the computer to calculate the appropriate offset can be difficult and should do more tests. Juvenile Warning

    Nintendo, which makes a 3D console, released on its website a security warning about the potential dangers to view images in 3D mode under six years. As visual content is delivered stereoscopically, with different images for each eye, could affect the vision of the children because it is still under development.