Artifact (photography)
As artifacts all image details are in digital photography refers representing an unintended contrast to the image source. The term "artifact" is also used for rendered computer graphics , see artifact (computer graphics) .
Artifacts in an indoor photo without sufficient flash output. Numerous interferences are already visible in the original file (above) (including colored noise). The brightening can be seen below. One of the most noticeable artifacts is the color cast .
In its literal translation, “artefact” means “an artificial structure” caused by humans.
Sample artifacts in digital photography
Formation of blocks through JPEG compression
Enlarged image section with block artifacts created by JPEG compression of an image (right), less compressed original (left)
Typical artifacts in digital photography are:
- Image noise
- Graininess
- Color casts
- Blooming
- Hems
- Gibbs' phenomenon , ringing
- Moiré effect
- Rolling shutter effect
- Smear
- Glare
- Transformation losses (podium effect)
- Loss of compression such as color distortions, blurring, hems
- Blocking artifacts : With lossy image compression such as JPEG or lossy video compression such as MPEG , visible artifacts (mostly) occur due to a lack of information. These are unavoidable, but the algorithms try to keep the impairments visible to humans to a minimum.
See also
- Compression artifact (JPEG compression)
Individual evidence
- ↑ Artifact in Wiktionary