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A clipping path (or "deep etch") is a closed vector path, or shape, used to cut out a 2D image in 
By convention, the inside of the path is defined by its direction. Reversing the direction of a path reverses what is considered inside or outside. An ''inclusive path'' is one where what is visually "inside" the path corresponds to what will be preserved; an ''exclusive path'', of opposite direction, contains what is visually "outside" the path. By convention, a clockwise path that is non-self-intersecting is considered inclusive.
A compound path results from the combination of multiple paths (inclusive and exclusive) and the Boolean operations that ultimately determine what the combined path contains. For instance, an inclusive path which contains a smaller exclusive path results in a shape with a "hole" (defined by the exclusive path).
One common use of a clipping path is to cull objects that do not need to be rendered because they are outside the user's
image editing
Image editing encompasses the processes of altering images, whether they are Digital photography, digital photographs, traditional Photographic processing, photo-chemical photographs, or illustrations. Traditional analog image editing is known ...
software. Anything inside the path will be included after the clipping path is applied; anything outside the path will be omitted from the output. Applying the clipping path results in a hard (aliased) or soft (anti-aliased) edge, depending on the image editor's capabilities
By convention, the inside of the path is defined by its direction. Reversing the direction of a path reverses what is considered inside or outside. An ''inclusive path'' is one where what is visually "inside" the path corresponds to what will be preserved; an ''exclusive path'', of opposite direction, contains what is visually "outside" the path. By convention, a clockwise path that is non-self-intersecting is considered inclusive.
A compound path results from the combination of multiple paths (inclusive and exclusive) and the Boolean operations that ultimately determine what the combined path contains. For instance, an inclusive path which contains a smaller exclusive path results in a shape with a "hole" (defined by the exclusive path).
One common use of a clipping path is to cull objects that do not need to be rendered because they are outside the user's viewport
A viewport is a polygon viewing region in computer graphics.
In computer graphics theory, there are two region-like notions of relevance when rendering some objects to an image. In textbook terminology, the ''world coordinate window'' is the area ...
or obscured by display elements (such as a HUD).
In 3D graphics
Clipping planes are used in3D computer graphics
3D computer graphics, sometimes called Computer-generated imagery, CGI, 3D-CGI or three-dimensional Computer-generated imagery, computer graphics, are graphics that use a three-dimensional representation of geometric data (often Cartesian coor ...
in order to prevent the renderer from calculating surfaces at an extreme distance from the viewer. The plane is perpendicular to the camera
A camera is an instrument used to capture and store images and videos, either digitally via an electronic image sensor, or chemically via a light-sensitive material such as photographic film. As a pivotal technology in the fields of photograp ...
, a set distance away (the ''threshold''), and occupies the entire viewport. Used in real-time rendering, clipping planes can help preserve processing for objects within clear sight.
The use of clipping planes can result in a detraction from the realism of a scene, as the viewer may notice that everything at the threshold is not rendered correctly or seems to (dis)appear spontaneously. The addition of ''fog''—a variably transparent region of color or texture just before the clipping plane—can help soften the transition between what should be in plain sight and opaque, and what should be beyond notice and fully transparent, and therefore does not need to be rendered.
Clipping path service
Clipping path services are professional offerings provided by companies for extracting objects or people from still imagery, and typically includes other photo editing and manipulation services. Addressees of such services are primarily photography and graphic design studios, advertising agencies, web designers, as well as lithographers and printing companies. Clipping path service companies commonly reside indeveloping countries
A developing country is a sovereign state with a less-developed Secondary sector of the economy, industrial base and a lower Human Development Index (HDI) relative to developed countries. However, this definition is not universally agreed upon. ...
such as Bangladesh
Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by ...
, Philippine
The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...
, India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
, Pakistan
Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia. It is the List of countries and dependencies by population, fifth-most populous country, with a population of over 241.5 million, having the Islam by country# ...
and Nepal
Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...
, which can provide their services at comparatively low cost to developed countries, fostering outsourcing
Outsourcing is a business practice in which companies use external providers to carry out business processes that would otherwise be handled internally. Outsourcing sometimes involves transferring employees and assets from one firm to another ...
of such activities.
See also
*Silhouette
A silhouette (, ) is the image of a person, animal, object or scene represented as a solid shape of a single colour, usually black, with its edges matching the outline of the subject. The interior of a silhouette is featureless, and the silhouett ...
References
{{reflist Digital art