Abstract

We present an application of circular-harmonic filters (CHF’s) for the recognition of planktonic microorganisms. CHF’s discriminated both genera Acartia and Calanus. The symmetry of genus Acartia permitted discrimination to the species and sex levels, whereas the asymmetry of the genus Calanus permitted discrimination only to the generic level. The differences among organisms of different sex of the genus Calanus could not be detected by these particular CHF’s. More research needs to be carried out with more complex CHF’s to enhance their performance and to permit the implementation of an automated optodigital system to identify and count marine microorganisms.

© 1997 Optical Society of America

Circular-harmonic minimum average correlation energy filter for color pattern recognition

Javier Garcia, Juan Campos, and Carlos Ferreira
Appl. Opt. 33(11) 2180-2187 (1994)

Amplitude-modulated circular-harmonic filter for pattern recognition

Xue-wen Chen and Zhen-pei Chen
Appl. Opt. 34(5) 879-885 (1995)

Statistical performance of the circular harmonic filter for rotation-invariant pattern recognition

Yuan-Neng Hsu and Henri H. Arsenault
Appl. Opt. 22(18) 2804-2809 (1983)

Optical generation of a circular harmonic filter for rotation and translation invariant optical pattern recognition

Yeou-Yen Cheng
Appl. Opt. 26(20) 4413-4415 (1987)

Circular harmonic phase filters for efficient rotation-invariant pattern recognition

Joseph Rosen and Joseph Shamir
Appl. Opt. 27(14) 2895-2899 (1988)