US 2006/0039622 A1 · Sharpness enhancement

Abstract

A two-dimensional enhancement function (HEF; VEF) determines a peaking factor (CX; CY) for an input signal (L(m,n)) based on the output signals of both a first edge detector (HHP; VHP) and a second edge detector (HBP; VBP) which both operate in the same first spatial direction. In this manner, all different kind of borders which may occur in the input signal (L(m,n)) in the first spatial direction are distinguished. The two-dimensional enhancement function (HEF; VEF) allocates values which determine the amount of peaking to the different combinations of the output signals (ZX, DX; ZY, DY). It is possible to select the values allocated by the two-dimensional enhancement function (HEF; VEF) different for different kind of borders to obtain the desired amount of peaking fitting each kind of border best.

Claims20

Dependent claims

A method of sharpness enhancement of an input signal comprising

detecting in a first spatial direction a first subset of edges in the input signal to obtain a first detector signal,
detecting in the first spatial direction a second subset of edges in the input signal to obtain a second detector signal, said second subset being different from the first subset,
determining a peaking factor by using a predetermined two-dimensional enhancement function allocating values for the peaking factor to combinations of values of the first detector signal and the second detector signal, and
multiplying the first detector signal with the peaking factor to obtain a peaked signal.

1 more element

Dependencies are inferred from the claim text.

Sharpness enhancement

Life of this patent

Sharpness enhancement

Life of this patent

Abstract

Claims20