Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Shape-from-focus for real-time terahertz 3D imaging

Not Accessible

Your library or personal account may give you access

Abstract

Thanks to significant advances in real-time terahertz imaging in terms of resolution and image quality, adapting and extending optical methods for 3D imaging at the millimeter scale is now promising. The shape-from-focus algorithm is a post-processing tool used in optical microscopy to reconstruct the external shape surface of a convex surface object. Images acquired at different distances from the object-side focal plane are implemented in this algorithm. We localize the best focus position in the stack of images for each pixel and then reconstruct the object in 3D due to the short depth of field. In this Letter, we propose an application of this algorithm in active and real-time terahertz imaging. We achieve the experimental reconstruction in 3D with a terahertz waves imaging system composed of a powerful source and a real-time terahertz camera.

Full Article  |  PDF Article
More Like This
High-resolution real-time 360° 3D model reconstruction of a handheld object with fringe projection profilometry

Jiaming Qian, Shijie Feng, Tianyang Tao, Yan Hu, Kai Liu, Shuaijie Wu, Qian Chen, and Chao Zuo
Opt. Lett. 44(23) 5751-5754 (2019)

Calibration method for a multi-focus microscopic 3D imaging system

Liming Chen, Wang Xiang, and Song Zhang
Opt. Lett. 48(16) 4348-4351 (2023)

Reconstructing 3D point clouds in real time with look-up tables for structured light scanning along both horizontal and vertical directions

Kai Liu, Jianwen Song, Daniel L. Lau, Xiujuan Zheng, Ce Zhu, and Xiaomei Yang
Opt. Lett. 44(24) 6029-6032 (2019)

Supplementary Material (3)

NameDescription
Visualization 1       Visualization 1 = video of the transmission images of a leaf at 2.5THz.
Visualization 2       Visualization 2 = video of the transmission images of 2 leaves at 2.5THz.
Visualization 3       3D reconstruction of the two leaves by SFF algorithm.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved