Autocorrelation Function (ACF): the cross-correlation function of an image with itself. The ACF is centrosymmetric, and its highest peak is always in the origin, a shift position where both signal and noise contents of the image overlap.

 

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Autocorrelation Function (ACF): the cross-correlation function of an image with itself. The ACF is centrosymmetric, and its highest peak is always in the origin, a shift position where both signal and noise contents of the . . . View Full Definition

Harmonic Function: In its simplest form, a quantity that varies as the cosine of an angle that increases uniformly with time. It may be expressed by the formula: y = A cos at in which y is a function of time ( . . . View Full Definition

MTF (Modulation Transfer Function): A comparison of contrast between a test chart and the reproduced image. One of the measurements of lens performance used in the manufacturing process.

Grammatical Function: A category for words in inflected languages--typical examples include aspect, mood, and tense for verbs, person and case for pronouns, case and definiteness for articles, and number, case, a . . . View Full Definition

Functional Status: A patient's ability to perform the activities of daily living.

Functional Shift: The linguistic equivalent of poetic anthimeria, in which one part of grammatical speech becomes another. An especially common type of functional shift in everyday grammar is taking a noun an . . . View Full Definition

Narrative Function: A specific action or an attribute of a character in a narrative--according to the narrative theory of V.I. Propp.

Functional Team: A group of employees who are responsible for a particular function within the organization.

Probability Density Function: The function that describes the change of certain realizations for a continuous random variable.

Utility Function: A power company that owns or operates facilities used for the generation, transmission, or distribution of electric energy, which is regulated at state and federal levels.