High-speed all-in-focus 3D imaging technology based on the liquid lens focus scanning

Huayu Cheng; Lihui Wang; Satoshi Tabata; Yuan He; Yan Hu; Jiang Liu

doi:10.1117/12.2686779

27 November 2023 High-speed all-in-focus 3D imaging technology based on the liquid lens focus scanning

Huayu Cheng, Lihui Wang, Satoshi Tabata, Yuan He, Yan Hu, Jiang Liu

Proceedings Volume 12767, Optoelectronic Imaging and Multimedia Technology X; 127670C (2023) https://doi.org/10.1117/12.2686779
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

A large open aperture in an optical system can capture high-resolution images but yields a shallow depth of field. To overcome this issue, we propose a method for improving microscopy imaging systems by using a variable-focus liquid lens to achieve 3D focus scanning. Specifically, the focal length of the imaging system was changed by the liquid lens, and a sequence of 12 images was captured in different focal planes. The image scale was adjusted according to the change in focal length, and the phase of the image was corrected by the phase only correction method. Then the in-focus pixels were abstracted by employing the Laplacian operator. Finally, an all-in-focus sharp image was generated, and a depth map was obtained. Additionally, to accelerate the processing speed, the Fast Fourier Transform image processing during phase correction was optimized. Meanwhile, we propose a parallel optimization solution for the original processing flow.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Huayu Cheng, Lihui Wang, Satoshi Tabata, Yuan He, Yan Hu, and Jiang Liu "High-speed all-in-focus 3D imaging technology based on the liquid lens focus scanning", Proc. SPIE 12767, Optoelectronic Imaging and Multimedia Technology X, 127670C (27 November 2023); https://doi.org/10.1117/12.2686779

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KEYWORDS

Liquid lenses

Liquids

Image processing

Cameras

Image fusion

Depth maps

Focus stacking

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