Automatic Focusing of Off-Axis Digital Holographic Microscopy by Combining the Discrete Cosine Transform Sparse Dictionary with the Edge Preservation Index

Automatic Focusing of Off-Axis Digital Holographic Microscopy by Combining the Discrete Cosine Transform Sparse Dictionary with the Edge Preservation Index

Automatic focusing is a crucial research issue for achieving high-quality reconstructed images in digital holographic microscopy. This paper proposes an automatic focusing method that combines the discrete cosine transform (DCT) sparse dictionary with edge preservation index (EPI) criteria for off-a...

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Bibliographic Details
Main Authors: Zhaoliang Liu, Peizhen Qiu, Yupei Zhang
Format: Article
Language:English
Published: MDPI AG 2025-05-01
Series:Optics
Subjects:
digital holographic microscopy
automatic focusing
discrete cosine transform sparse dictionary
edge preservation index
Online Access:https://www.mdpi.com/2673-3269/6/2/17
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