Photos are reversed, just like the world of mirrors. What is this art called?

This phenomenon is called projection. The shadow (sun shadow for short) formed by an object under sunlight is a parallel projection. The direction of the sun shadow can reflect the time. In ancient China, a timer sundial was used to observe the time according to the shadow of the sun. The central projection is the shadow formed by the light emitted by the light bulb. Shadow play is a kind of performing art that reflects the shape of shadow on the screen (projection surface) by using the illumination of light. Projection is to imagine that there is a parallel light source shining on the object above, and there will be shadows below. That is, the vertical line that passes through all points of the object to form a plane intersects with the vertical line in the plane figure.

Photographic art, also known as color positive image, is consistent with the original scenery and is mainly used for viewing and screening and printing and plate making. In the washing process, it is divided into internal coupling type and external coupling type. Internal coupling is to put the coupler in the emulsion, and the common reversal films are internal coupling, so the washing procedure is simple. The external coupling method is to put the coupling agent in the developer, and the cleaning procedure is complicated, and it is usually sent back to the original factory for cleaning. Vivid colors and good saturation are called realistic art.

Do not mirror and map:

The image file is actually an independent file. Different from other files, it is made of multiple files by burning software or mirror file making tools.

Image files are widely used, and the most common application is data backup (such as floppy disk and CD-ROM). With the popularization of broadband network, some download websites also download files in ISO format, which facilitates the production and delivery of software CDs. Common image file formats are ISO, BIN, TAO, DAO, CIF and so on.

In mathematics, mapping is used to describe a special correspondence between two groups of elements: suppose there are two groups of elements A and B, and if there is only one element corresponding to each element in A, then this correspondence from A to B is called mapping.