A study of focus metrics and their application to automated focusing of inline transmission holograms

Nicholas Michael Burns; John Watson

doi:10.1179/174313111X12966579709313

A study of focus metrics and their application to automated focusing of inline transmission holograms

Nicholas Michael Burns, John Watson

Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

In this article, we will explore the use of several spatial-domain focus metrics frequently applied in non-coherent (classical) imaging systems, and evaluate their suitability for the automated numerical focusing of marine holograms such as those collected with eHoloCam, the underwater digital holographic camera developed at Aberdeen University. Metrics will be applied to a set of particle holograms chosen to represent a range of features within the three categories: opacity, edge roughness and distance from image sensor.

Original language	English
Pages (from-to)	90-99
Number of pages	10
Journal	The Imaging Science Journal
Volume	59
Issue number	2
DOIs	https://doi.org/10.1179/174313111X12966579709313
Publication status	Published - Apr 2011

Keywords

entropy
variance
Tenengrad
Brenner
hologram
Sobel

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1179/174313111X12966579709313

Cite this

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KW - entropy

KW - variance

KW - Tenengrad

KW - Brenner

KW - hologram

KW - Sobel

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A study of focus metrics and their application to automated focusing of inline transmission holograms

Abstract

Keywords

UN SDGs

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