Function - Covariant

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A function is covariant when it commutes with the transformation, i.e.:

applying the transformation to the argument of the function has the same effect as applying the transformation to the output of the function.

See also: Function - Invariant


The orientation of the major axis of inertia of the surface is covariant under a rotation transformations, since rotating a 2D surface will affect the orientation of its major axis in exactly the same way.

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Function - Invariant

A function (or property) is invariant under a certain family of transformations if its value does not change when a transformation from this family is applied to its argument. See also: The area...
Image Intrinsic Dimension
Raster Image - Feature (Image Properties)

A feature is property of an image. intensity, color, texture. For the whole image For a set of pixel. Local features provide a limited set of well localized and individually identifiable...

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