Particle velocity computation using a phase-only filter

Abdul Ahad Sami Awwal; Syed M. Munir; Mohammad Kamrul Islam

doi:10.1117/12.408566

29 November 2000 Particle velocity computation using a phase-only filter

Abdul Ahad Sami Awwal, Syed M. Munir, Mohammad Kamrul Islam

Proceedings Volume 4114, Photonic Devices and Algorithms for Computing II; (2000) https://doi.org/10.1117/12.408566
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

This paper introduces two new concepts into the field of particle image velocimetry. Traditionally, a particle image velocimeter is based on correlation operation between multiply exposed images. Cross-correlation operation is same as classical matched filtering (CMF) operation, which suffers from low peak intensity and power efficiency. Phase only filter (POF), because of its power efficiency and sharp correlation peak has been used extensively for pattern recognition. We propose to introduce POF instead of CMF for tracking high-speed particles. In addition, a powerful approach for particle tracking is introduced which involves tracking the particle in nine-directions. To track displacement of particles further away from original location, the original image is correlated with eight blocks around the original block. This enable us to track higher velocity particles. The method involves correlating two pictures taken some time apart. Phase only filter is used to correlate the original image with its time and space- shifted version to determine the velocity of the particles.

Citation Download Citation

Abdul Ahad Sami Awwal, Syed M. Munir, and Mohammad Kamrul Islam "Particle velocity computation using a phase-only filter", Proc. SPIE 4114, Photonic Devices and Algorithms for Computing II, (29 November 2000); https://doi.org/10.1117/12.408566

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