speckle

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speckle

(spĕk′əl)
n.
A speck or small spot, as a natural dot of color on skin, plumage, or foliage.

speck′le v.

speckle

A grainy distortion (a kind of “noise”) in an ultrasonographic image.
References in periodicals archive ?
Similar to the 905 nm speckle pattern exists a comparable time albeit at smaller dimensions for 660 nm red laser light.
A field speckle pattern by two perfectly conducting rough surfaces is shown in Figure 7.
Note that the principle of correlation-based DIC determines the average displacement of a small group of speckles that form a unique speckle pattern within the subset, rather than determination of the displacement of an individual speckle [7].
Thermal strain measurements using electronic speckle pattern interferometry.
This speckle pattern is characteristic for a particular surface element just like a fingerprint and if that surface element is undergoing a pure displacement [[Delta].
One of the proposed methods is based on the use of the "time contrast" of the speckle pattern history.
A laser beam passing through a tag produces a speckle pattern, which then is used to calculate an identification number.
On the outside, the trays have a grey speckle pattern, which found favour in consumer tests.
Moving blood cells, for instance, can be mapped in living tissue by reviewing changes in the speckle pattern.
By measuring which antenna in a widely-separated pair receives the speckle pattern first, the astronomers can learn which way the asteroid is spinning.
In order to eliminate speckle pattern at the output of the fiber, a rotating diffuser was used to reduce spatial coherence of the laser.