Test Pattern


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test pattern

[′test ‚päd·ərn]
(communications)
A chart having various combinations of lines, squares, circles, and graduated shading, transmitted from time to time by a television station to check definition, linearity, and contrast for the complete system from camera to receiver. Also known as resolution chart.

Test Pattern

 

a slide on which a standard pattern is drawn; it is used for quantitative evaluation of the resolving power of optical instruments, particularly lenses. A test pattern may have various configurations and different degrees of contrast of its elements. The elements often are dark lines on a light background or alternating dark and light sectors. The density of the lines in different parts of the pattern changes, increasing from top to bottom and from left to right.

By observing the image of the test pattern that is produced by an optical instrument, it is possible to determine for which element of the image the individual lines cease to be distinguishable (merge), which directly gives the maximum resolving power of the instrument in numbers of lines N per millimeter (or, by known conversion formulas, in angular seconds ψ and in milli-meters δ).

References in periodicals archive ?
Test Pattern Generator Based on Finite State Machine
Determining of faults undetectable by test can be performed as well as by the individual test pattern. Now we will discuss most likely detected or undetected faults with regards to a given test.
Another hybrid SBST method [11] was proposed to utilize the deterministic structural SBST methodologies (using RT-level test development and gate-level-constrained ATPG test development) combined with verification based self-test code development and directed random test pattern generator (RTPG).
Each of them can be used as a test pattern for the given short, or used as the defect condition for SAF at the output y.
"Test Pattern," the group's sixth album, reflects many influences, including Middle Eastern and Indian instruments, roots-rock, African vocals and jazz.
With this level of flexibility, designers can configure even the most complex pulse patterns, including antenna scan patterns, frequency-agile pulse patterns with 80 MHz RF modulation bandwidth, and receiver sensitivity and selectivity test patterns.
The network was trained on all the patterns of these analogous sets, and on the fourth critical set it was exposed to the training patterns only, before performance on the test patterns was assessed.
What is the likely interpretation of this test pattern?
-- patternROBUSTNESS(TM) -- test pattern stability analysis.
The researchers also compared the data to PET scans showing brain activity stimulated when participants viewed fuzzy images similar to a television test pattern and a series of nonsense objects with no discernible use.
The Test Generation (sequential logic) benchmarks are a set of 31 sequential circuits used for comparing the results of test pattern generation software.
Test points targeting ATPG test pattern count are relatively new.