Perspective

Development

Stereo Charles Wheatstone found in 1838, he also gave an explanation for both eyes, which guided him to build a A device consisting of prisms and mirrors, thereby enabling people to observe three-dimensional effects from a pair of two-dimensional images.

With the development of AUTOSTEREOGRAM, the stereoscopic map is resolved. In AutoStereogram, the three-dimensional effect is hidden in a separate two-dimensional image, and the observer can only observe the stereoscopic image after properly focusing the eye. The Magic Eye series is a popular instance. Magic Eye refers to the stereo chart in AUTOSTEREOGRAM, which makes many people think that the stereo is the synonym of AutoStereogram.

Category

Stereoscopic Imaging is typically a special image, and the observer needs to see the corresponding image by using a stereoscopic to make the corresponding image, respectively. If a pair of images are narrow and placed in parallel, it is also possible to observe AutoStereogram.

anaglyph image is also referred to as "red / green", is made of a special monochrome image through different color channels (usually red and green or green and green). Observers often need to wear stereo glasses. The lens of this stereo glasses is two filter, and the type of the filter is determined by the image. For example, observe the image mixed through red and cyan channels, the observer needs to wear three-dimensional glasses with red filters and cyan filters, red filters allow one eye to see the red portion on the image, The cyan filters allows the other eye to see the cyan part on the image, thereby simulating the situation of observing the stereoscopic. The principle of stereo movies is similar to such three-dimensional charts, but the stereo film employs the principle of polarization, and the filter is replaced with a polarizing plate.

Random Dot Stereograms Changes from the first two stereo charts, in order to replace the physical image with color random dot matrix. The content expressed in this stereoscopic figure cannot be directly recognized, and only the stereo shape hidden in it is only concealed by a special method or by means of equipment.

AutoStereograms is a single three-dimensional map, usually completed by computer production. The observer needs to properly focus on the eye to observe stereoscopic images. This stereoscopic map is not simply placing a pair of images in parallel or in different color channels, which gives people an intuitive impression similar to "a set of narrow patterns in the horizontal direction", but there is a fine between these patterns Differences. The purpose of making such a perspective figure is to reduce the difficulty of focusing, and can make a large-scale perspective.

SIRDS (Single Image Random Dot Stereogram is an AutoStereogram made with Random Dot Stereogram. The content expressed in the figure cannot be directly recognized. The observation method is the same as the method of observing AutoStereogram.

AutoStereograms: AutoStereogram is a single three-dimensional view that is usually completed by a computer, and the observer can be observed from the perspective image by focusing the eye-catching to the rear (distance) or front (near). The method of focusing the eye-catching back to the perspective view is also called "parallel observation", and the method of focusing to the front is also called "cross-observation". The purpose of changing the location of the eye-focus position is to "look" exactly overlapping the two repeating patterns on the perspective view, and use the difference between the overlapping pattern to produce a three-dimensional sensation.

According to MAGIC Eye, AUTOSTEREOGRAM's producer usually "more likes to make a stereoscopic map observed with 'parallel observation". However, for ordinary perspective, because the limitations of "parallel observation", large charts are difficult to observe even this method, and therefore, "cross-observation" is usually used. If a stereoscopic figure is observed with a wrong method, the observed stereoscopic image will be with the expected "reverse", that is, the convex portion will become a recessed, and the portion of the depressed will become convex.

Design method

three ways of stereoscopic design:

1. Directly designed aspects of long-width high;

3. By stereo camera, or software The series can be used for stereo rendering with PSDTO3D software to make 3D perspective.

Expression method

Unable to express three-dimensional effects in ordinary planes, usually express:

(1) stereo grating: Basically the most Cheap three-dimensional expressions are mainly used for 3D grating stereoscopic printing.

(2) Stereo Display: It is divided into two.

1. Wear glasses, such as circularly polarized glasses, linear polarized glasses.

2. Naked eye display, is also called free stereoscopic display. Still developed.

(3) Complementary color perspective: It can be seen by wearing complementary color glasses, mainly red blueprint.

actual application

Stereographic principles are often applied to entertainment, including stereo movies, stereo albums, etc. At the same time, there are also applications in science and technology.

Stereo diagram is also used in the treatment of binocular visual and regulating reactions.

NASA uses a device that produces a perspective figure in the 2003 Mars Detective Rover, which enables researchers to observe the stereo Mars on the perspective view.

The two cameras constituting the PANCAM are mounted at a position of 1.5 meters away from the ground, and there is a spacing between the two cameras and maintain an inward angle in one degree. This makes the resulting pair of images satisfies the conditions constituting the perspective view, and can be treated as a stereoscopic image or generate a three-dimensional image through a computer.

The ability to generate a three-dimensional image from a pair of cameras than one person enable researchers to understand the characteristics of the observed scene. In an environment without smoke or unfamiliar landmarks, people can only rely on the distinctive image system to determine the distance. Therefore, a single camera viewpoint is difficult to do this, while the three-dimensional imaging system like Pancam is well solved the problem encountered in unmanned space exploration.