What is a mosaic ah ...... what does it mean to seek an explanation

Refers to the current widespread use of an image (video) processing means, this means that the image of a particular region of the color gradient details degraded and caused by the effect of color blocking disruption, because this blurring looks like there is a small grid composed of an image of the image called this picture for the mosaic. The goal is usually to make it unrecognizable.

For example, a picture, they are a lot of different colors in the small color block, because these color blocks of pixels is very very small and densely packed, and mosaic is to circle a range (small color blocks for the range of the integer, so generally use rectangles or squares to circle)

Mosaic original meaning: (Mosaic), the architectural term for the brocade tile, is divided into Ceramic brocade tile and glass brocade tile two kinds. Is a kind of decorative art, usually using many small stones or tinted glass fragments to put together a pattern, in the church in the glass art, also known as flower window glass. In the era of the Byzantine Empire, mosaics developed as a form of fresco in churches and palaces with the rise of Christianity.

Expanded information:

Role

Take the RGB as an example, R (red), G (green), B (blue). B (blue). Each of these three colors has an intensity value in the range of 0 to 255, with higher numbers being brighter.

For example, bright red uses an R value of 255, a G value of 0, and a B value of 0. Colored light can be washed out and brightened by colorless light. If blue light meets white light, the result is a brighter light blue light. So the difference in the values of R, G, and B to mix colors.

It is a blurred area inside some news or movies to hide key parts of a character (genitals, face, etc.).

Reference:

Baidu Encyclopedia-Mosaic