High-speed camera system for the acquisition of flow tomography sequences for 3D least squares matching

Hans-Gerd Maas

doi:10.1117/12.189155

6 October 1994 High-speed camera system for the acquisition of flow tomography sequences for 3D least squares matching

Hans-Gerd Maas

Proceedings Volume 2350, Videometrics III; (1994) https://doi.org/10.1117/12.189155
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

Abstract

For the examination of mixing processes in turbulent flows a system based on a high-speed solid state camera has been implemented, which allows for the quasi-simultaneous acquisition of sequences of flow tomography voxel data. In these data, velocity fields are determined by 3D least squares matching. The first part of the paper will show a hardware configuration based on a highspeed solid state camera with a maximum frame rate of 500 images per second and a scanning laser lightsheet, which allows for the acquisition of flow tomography data sequences with a typical size of 256 X 256 X 50 voxels per volume dataset at a rate of 10 datasets per second. The quality of the data and some special problems of the highspeed camera will be discussed. In the second part of the paper the 3D implementation of least squares matching with a 12-parameter 3D affine transformation between voxel-patches of consecutive datasets will be described. In order to strengthen the matching in regions with insufficient local contrast the algorithm is combined with several geometric and radiometric constraints.

Citation Download Citation

Hans-Gerd Maas "High-speed camera system for the acquisition of flow tomography sequences for 3D least squares matching", Proc. SPIE 2350, Videometrics III, (6 October 1994); https://doi.org/10.1117/12.189155

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available