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Feathering is a technique used in
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*Evening, Martin. ''Adobe Photoshop CS2 for Photographers''. {{ISBN, 0-240-51984-1}
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Computer graphic techniques
Feathering is a technique used in computer graphics
Computer graphics deals with generating images with the aid of computers. Today, computer graphics is a core technology in digital photography, film, video games, cell phone and computer displays, and many specialized applications. A great de ...
software
Software is a set of computer programs and associated documentation and data. This is in contrast to hardware, from which the system is built and which actually performs the work.
At the lowest programming level, executable code consist ...
to smooth or blur the edges of a feature. The term is inherited from a technique of fine retouching using fine feathers
Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and a premier ...
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Paintbrush feathering
Feathering is most commonly used on a paintbrush tool in computer graphics software. This form of feathering makes the painted area appear smooth. It may give the effect of an airbrush or spraypaint. Color is concentrated at the center of the brush area, and it blends out toward the edges.Selection feathering
Feathering is not only used on paintbrushes in computer graphics software. Feathering may also blend the edges of a selected feature into the background of the image. When composing an image from pieces of other images, feathering helps make added features look "in place" with the background image. For instance, if someone were to want to add a leaf to a photograph of grass using computer graphics software, he or she might use feathering on the leaf to make it blend in with the grassy background.Clone tool feathering
The "Clone" tool is very important in photograph manipulation on computer graphics software. The clone tool is used to actively copy and offset pixels from one area of an image to another while the artist moves the clone tool around the area to be copied. A good example is the use of the clone tool to cover a skin blemish by copying skin from one area of an image and placing it over the blemish. An important aspect of making a clone tool blend well in an image is to use feathering on the clone tool. This makes the pixels being copied have more effect on the area they are copied to closer to where the artist is dragging his or her mouse or stylus, and makes the pixels have less effect the farther they are from the clone tool (and where the artist is using it). Thus, with the skin example, skin pixels copied directly over the blemish will have strong effect on the blemish, thus hiding it, but skin pixels copied to the area around the blemish will not affect this area much, and will keep the natural look of the skin (wrinkles etc.) intact as much as possible.See also
*Metering mode
In photography, the metering mode refers to the way in which a camera determines exposure. Cameras generally allow the user to select between ''spot'', ''center-weighted average'', or ''multi-zone'' metering modes. The different metering modes al ...
*Vignetting
In photography and optics, vignetting is a reduction of an image's brightness or saturation toward the periphery compared to the image center. The word '' vignette'', from the same root as ''vine'', originally referred to a decorative bord ...
*Aliasing
In signal processing and related disciplines, aliasing is an effect that causes different signals to become indistinguishable (or ''aliases'' of one another) when sampled. It also often refers to the distortion or artifact that results when ...
References
*Airey, Theresa. ''Creative Digital Printmaking''.Google Books
*Evening, Martin. ''Adobe Photoshop CS2 for Photographers''. {{ISBN, 0-240-51984-1}
Google Books
Computer graphic techniques