Signal processing apparatus and method for enhancing a digital input signal

US12315119B2 · kind B2 · utility

Assignee

• LEICA MICROSYSTEMS CMS GMBH · DE

Inventors

• Kai WALTER · Schriesheim, DE
• Florian ZIESCHE · Mannheim, DE

Key dates

• Filing date: Jun 19, 2020
• Grant date: May 27, 2025
• Expiry date: Jan 26, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/30024
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A signal processing apparatus for enhancing a digital input signal (I(xi)) recorded by a recording system having a system response (H(xi)), is configured to retrieve the digital input signal (I(xi)) and compute a baseline estimate (ƒ(xi)) of the digital input signal, the baseline estimate representing a baseline of the digital input signal and comprising features of the digital input signal that are larger than a feature length (fl). The apparatus is further configured to remove the baseline estimate from the digital input signal to obtain an output signal comprising spatial features that are smaller than the feature length, retrieve a characteristic length (cl) of the system response (H(xi)) and compute the baseline estimate (ƒ(xi)) using a feature length that is smaller than the characteristic length of the system response (H(xi)).