Fogging is a type of visual censorship. An area for a picture or movie is blurred to obscure it from sight. This form of censorship

Censorship

thumb|[[Book burning]] following the [[1973 Chilean coup d'état|1973 coup]] that installed the [[Military government of Chile |Pinochet regime]] in Chile...

 is used for sexually related images/scenes, hiding genitals, pubic hair

Pubic hair

Pubic hair is hair in the frontal genital area, the crotch, and sometimes at the top of the inside of the legs; these areas form the pubic region....

, or sexual penetration

Sexual penetration

Sexual penetration is a sexual activity that involves the entry into a bodily orifice, such as the vagina, anus or mouth, with a body part or an object....

 of any sort. Pixelization

Pixelization

Pixelization is a video- and image-editing technique in which an image is blurred by displaying part or all of it at a markedly lower resolution. It is primarily used for censorship...

 is a form of fogging. In Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, where it is called bokashi, fogging is employed on most films that show pubic hair or genitals, including hardcore pornography

Hardcore pornography

Hardcore pornography is a form of pornography that features explicit sexual acts. The term was coined in the second half of the 20th century to distinguish it from softcore pornography. It usually takes the form of photographs, often displayed in magazines or on the Internet, or films. It can also...

.

This form of editing also appears in television programs where an individual's face may not be shown due to legal or privacy concerns. As it does not contrast with the surrounding image very much, it is preferable over most other forms of censorship.