Ren, Hongyu, Gao, Feng and Jiang, Xiangqian (2015) Improvement of high-order least-squares integration method for stereo deflectometry. Applied Optics, 54 (34). pp. 10249-10255. ISSN 0003-6935
![]() |
PDF
- Published Version
Restricted to Repository staff only Download (855kB) |
Abstract
Stereo deflectometry is defined as measurement of the local slope of specular surfaces by using two CCD cameras as detectors and one LCD screen as a light source. For obtaining 3D topography, integrating the calculated slope data is needed. Currently, a high-order finite-difference-based least-squares integration (HFLI) method is used to improve the integration accuracy. However, this method cannot be easily implemented in circular domain or when gradient data are incomplete. This paper proposes a modified easy-implementation integration method based on HFLI (EI-HFLI), which can work in arbitrary domains, and can directly and conveniently handle incomplete gradient data. To carry out the proposed algorithm in a practical stereo deflectometry measurement, gradients are calculated in both CCD frames, and then are mixed together as original data to be meshed into rectangular grids format. Simulation and experiments show this modified method is feasible and can work efficiently.
Item Type: | Article |
---|---|
Subjects: | Q Science > QC Physics T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
Schools: | School of Computing and Engineering |
Related URLs: | |
Depositing User: | Feng Gao |
Date Deposited: | 30 Nov 2015 10:36 |
Last Modified: | 28 Aug 2021 17:35 |
URI: | http://eprints.hud.ac.uk/id/eprint/26575 |
Downloads
Downloads per month over past year
Repository Staff Only: item control page
![]() |
View Item |