In this paper we present a new method for automated recognition of 12 microalgae that are most com-
monly found in water resources of Thailand. In order to handle some difficulties encountered in our
problem such as unclear algae boundary and noisy background, we proposed a new method for seg-
menting algae bodies from an image background and proposed a new method for computing texture
descriptors from a blurry texture object. Feature combination approach is applied to handle a variation
of algae shapes of the same genus. Sequential Minimal Optimization (SMO) is used as a classifier. An
experimental result of 97.22% classification accuracy demonstrates an effectiveness of our proposed
method.