Unschärfenerkennung mit lokaler Schärfenabbildung

Details

Veröffentlichungs-Nr.

EP2469837

Aktenzeichen

EP11189901

Anmeldetag

21. November 2011

Veröffentlichung

7. September 2016

Erteilung

7. September 2016

Rechtsraum

EP

IPC

G06T7/00H04N17/00H04N5/14H04N5/21

Abstract

A single-ended blur detection probe and method with a local sharpness map for analyzing a video image sequence uses two sets of edge filters, one for "fast edges" and the other for "slow edges." Each set of edge filters includes a horizontal bandpass filter, a vertical bandpass filter and a pair of orthogonal diagonal filters where the frequency response of the fast edge filters overlap the frequency response of the slow edge filters. The video image sequence is input to each filter of each set, and the output absolute values are combined with weighting factors to produce a slow edge weighted sum array and a fast edge weighted sum array. The respective weighted sum arrays are then decimated to produce a slow edge decimated array and a fast edge decimated array. The ratio of the maximum difference value between the decimated arrays and the maximum value from the fast edge decimated array, weighted by an appropriate factor, produces a localized maximum sharpness value, the log of which produces a dimensionless blur value.

Anmelder

Firma

Tektronix, Inc.

Land

🇺🇸 USA

Fachgebiete