Depth from focus with electrowetting liquid lens

Chunyu Zhang; Jiaqi Hu; Xinyu Zhang

doi:10.1117/12.2691230

7 March 2024 Depth from focus with electrowetting liquid lens

Chunyu Zhang, Jiaqi Hu, Xinyu Zhang

Proceedings Volume 13084, MIPPR 2023: Multispectral Image Acquisition, Processing, and Analysis; 1308403 (2024) https://doi.org/10.1117/12.2691230
Event: Twelfth International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2023), 2023, Wuhan, China

Abstract

Depth from focus and defocus is an effective technique to extract depth information from a set of images, which is called focal stack. In prior studies, this technology was commonly operated on complex laboratory imaging equipment. In this paper, a new imaging system based on electrowetting liquid lens is proposed. Electrowetting liquid lens is one of the adaptive lens which has adjustable focal length controlled by voltage signal. The focal stack can be easily got by sweeping the applied voltage without mechanical moving part. To eliminate the field of view (FOV) variations during the process of capturing focal stack, which is called focal breathing, we proposed an algorithm based on conventional flow concatenation to align focal stack images. We test the proposed imaging system on both laboratory scene and mobile phones, and the experiments demonstrate this imaging system can capture high quality images and shows excellent performance in extracting depth information without complex mechanical structure.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chunyu Zhang, Jiaqi Hu, and Xinyu Zhang "Depth from focus with electrowetting liquid lens", Proc. SPIE 13084, MIPPR 2023: Multispectral Image Acquisition, Processing, and Analysis, 1308403 (7 March 2024); https://doi.org/10.1117/12.2691230

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