Stalked protozoa identification by image analysis and multivariable statistical techniques

A Threshold Selection Method from Gray-Level Histograms

Nobuyuki Otsu · IEEE Transactions on Systems Man and Cybernetics · 1979 · 43.1K citations

Computing, Computer Science, Computer Vision +12

A sludge biotic index (SBI) for the evaluation of the biological performance of activated sludge plants based on the microfauna analysis

Paolo Madoni · Water Research · 1994 · 305 citations

Engineering, Biological Engineering, Environmental Engineering +17

The image processing handbook

Jun Zhang · Experimental Thermal and Fluid Science · 1995 · 288 citations

Arts, Computer Science, Computer Vision +11

Capability of ciliated protozoa as indicators of effluent quality in activated sludge plants

Humbert Salvadó, M. P. Gracia, J. M. Amigó · Water Research · 1995 · 141 citations

Engineering, Environmental Engineering, Microbiology +16

The Role of Protozoa in the Activated-Sludge Process

C. R. Curds · American Zoologist · 1973 · 102 citations · Full text

Engineering, Environmental Engineering, Microbiology +17