Abstract

A disadvantage of a well-tuned matched filter is partly overcome in recognizing biological species, i.e., algae. A simplified input pattern is prepared which simulates a given species. The matched spatial filter for this pattern can identify various diatoms in the species with considerably less size and orientation dependence. In addition, the filter still retains a high degree of pattern discrimination against other species.

© 1979 Optical Society of America

Rotational matched spatial filter for biological pattern recognition

Hitoshi Fujii, Silverio P. Almeida, and James E. Dowling
Appl. Opt. 19(7) 1190-1195 (1980)

Water pollution monitoring using matched spatial filters

Silverio P. Almeida and James Kim-Tzong Eu
Appl. Opt. 15(2) 510-515 (1976)

Multispectral size-averaged incoherent spatial filtering

S. P. Almeida, S. K. Case, and W. J. Dallas
Appl. Opt. 18(23) 4025-4029 (1979)

Pattern recognition with wavelength-multiplexed filters

S. K. Case
Appl. Opt. 18(12) 1890-1894 (1979)

Fourier transform differences and averaged similarities in diatoms

Silverio P. Almeida and Hitoshi Fujii
Appl. Opt. 18(10) 1663-1667 (1979)