Automatic classifying method for algae cell images

The invention discloses an automatic classifying method for algae cell images. The automatic classifying method includes steps that pre-processing algae images to obtain processed algae images; extracting visual features from the algae images according to the processed algae images to obtain feature vectors expressed by multi-feature fusion; classifying all the algae cells according to category, extracting the cell image with special proportion from each type of cells, and using the extracted cell images as a subsequent model learning training set; constructing target functions of a multi-task learning mode and solving; using a model obtained through training to forecast test data. The automatic classifying method for algae cell images lowers the calculating complexity and improves the algae cell classifying rate.