All Topics  
Artifact (observational)

 

 
   Email Print
   Bookmark   Link
 

 

Artifact (observational)
 
 
  Topics Artifact (observational) Topic Home

In natural science
Natural science

In science, the term natural science refers to a methodological naturalism approach to the study of the universe, which is understood as obeying rules or law of nature origin....
 and signal processing
Signal processing

Signal processing is the analysis, interpretation, and manipulation of signal . Signals of interest include: audio signal processing, , time-varying measurement values and sensor data, for example biological data such as electrocardiograms, control system signals, telecommunication transmission signals such as radio signals, and many others....
, an artifact is any perceived distortion
Distortion

A distortion is the alteration of the original shape of an object, image, sound, waveform or other form of information or representation. Distortion is usually unwanted....
 or other data
DATA

Debt, AIDS, Trade in Africa is a multinational Non-governmental organization founded in January 2002 in London by U2's Bono along with Robert Sargent Shriver III and activists from the Jubilee 2000 Drop the Debt campaign....
 error caused by the instrument of observation.

For example, a compression artifact
Compression artifact

A compression artifact is the result of an aggressive data compression scheme applied to an , Sound recording, or video that discards some data that may be too complex to store in the available data-rate, or may have been incorrectly determined by an algorithm to be of little subjective importance, but is in fact objectionable to the view...
 in computer science
Computer science

Computer science is the study of the theoretical foundations of information and computation, and of practical techniques for their implementation and application in computer systems....
 is a noticeable error caused by lossy data compression
Lossy data compression

A lossy compression method is one where data compression and then decompressing it retrieves data that may well be different from the original, but is close enough to be useful in some way....
. In microscopy
Microscopy

Microscopy is the technical field of using microscopes to view samples or objects. There are three well-known branches of microscopy, optical microscopy, electron microscopy and scanning probe microscopy....
, artifacts are sometimes introduced during the processing of samples into slide form.

In econometrics
Econometrics

Econometrics is concerned with the tasks of developing and applying quantitative or statistical methods to the study and elucidation of economic principles....
, which trades on computing relationships between related variable
Variable

A variable is a symbol that stands for a value that may vary; the term usually occurs in opposition to constant, which is a symbol for a non-varying value, i.e....
s, an artifact is a spurious finding, such as one based on either a faulty choice of variables or an overextension of the computed relationship.






Discussion
Ask a question about 'Artifact (observational)'
Start a new discussion about 'Artifact (observational)'
Answer questions from other users
Full Discussion Forum



Encyclopedia


Sirius A and B Hubble Photo
In natural science
Natural science

In science, the term natural science refers to a methodological naturalism approach to the study of the universe, which is understood as obeying rules or law of nature origin....
 and signal processing
Signal processing

Signal processing is the analysis, interpretation, and manipulation of signal . Signals of interest include: audio signal processing, , time-varying measurement values and sensor data, for example biological data such as electrocardiograms, control system signals, telecommunication transmission signals such as radio signals, and many others....
, an artifact is any perceived distortion
Distortion

A distortion is the alteration of the original shape of an object, image, sound, waveform or other form of information or representation. Distortion is usually unwanted....
 or other data
DATA

Debt, AIDS, Trade in Africa is a multinational Non-governmental organization founded in January 2002 in London by U2's Bono along with Robert Sargent Shriver III and activists from the Jubilee 2000 Drop the Debt campaign....
 error caused by the instrument of observation.

For example, a compression artifact
Compression artifact

A compression artifact is the result of an aggressive data compression scheme applied to an , Sound recording, or video that discards some data that may be too complex to store in the available data-rate, or may have been incorrectly determined by an algorithm to be of little subjective importance, but is in fact objectionable to the view...
 in computer science
Computer science

Computer science is the study of the theoretical foundations of information and computation, and of practical techniques for their implementation and application in computer systems....
 is a noticeable error caused by lossy data compression
Lossy data compression

A lossy compression method is one where data compression and then decompressing it retrieves data that may well be different from the original, but is close enough to be useful in some way....
. In microscopy
Microscopy

Microscopy is the technical field of using microscopes to view samples or objects. There are three well-known branches of microscopy, optical microscopy, electron microscopy and scanning probe microscopy....
, artifacts are sometimes introduced during the processing of samples into slide form.

In econometrics
Econometrics

Econometrics is concerned with the tasks of developing and applying quantitative or statistical methods to the study and elucidation of economic principles....
, which trades on computing relationships between related variable
Variable

A variable is a symbol that stands for a value that may vary; the term usually occurs in opposition to constant, which is a symbol for a non-varying value, i.e....
s, an artifact is a spurious finding, such as one based on either a faulty choice of variables or an overextension of the computed relationship. Such an artifact may be called a statistical artifact. For instance, a hypothetical finding that presidential approval rating
Approval rating

In the United States, presidential job approval ratings were introduced by George Gallup in the late 1930s to gauge public support for the president during his presidency....
 is approximately equal to twice the percentage of citizens making more than $50,000 annually would predict that the approval rating will be 120% if 60% of citizens make over $50,000. This prediction is a statistical artifact, since it is spurious to use the model
Model (abstract)

In mathematical logic, the formal languages, formal systems, and theory which are studied have no meaningful content until they are given an interpretation within some other system....
 when the percentage of citizens making over $50,000 is so high (and silly to predict an approval rating greater than 100%).

See also

Artifact (medical imaging)
Artifact (medical imaging)

Artifacts are misrepresentations of tissue structures seen in medical images produced by modalities such as Ultrasonography, X-ray Computed Tomography, and Magnetic Resonance Imaging....
 Artifact (error)
Artifact (error)

An artifact is the error or misrepresentation introduced by a technique and/or technology. For example a poor pseudo-random number generator would introduce artifacts into statistical research models....