What is the reason why the mirror takes a picture of a person and wraps it in black cloth?

The function of putting black cloth is because it "absorbs light".

We usually see the color of an object because it reflects color in light.

So when we say the color of an object, it is actually the color of the color it reflects.

A black object absorbs all the colors that the light source shines on it and becomes black;

In order to control the illumination on both sides of the subject in the studio, black cloth should be hung on both sides.

In case there is stray light or redundant reflected light on the subject, it will be reflected into the lens and recorded in the image. The best light-absorbing cloth is black velvet, which has the strongest light-absorbing ability, and of course the price is a little higher.

There are many things that can block the light in the mirror. For example, a black cloth can block the light in the mirror.

Because sunlight or artificial light hardly penetrates the black cloth material,

So this kind of black cloth has a good shading function and can also be used as the light in front of the mirror. Under this shade, some unnecessary light can be filtered out.