1 Introduction  
1.1 Basic knowledge of microorganisms  
1.2 Motivation of this review  
1.3 Related reviews  
1.4 Microorganism biovolume measurement methods  
1.5 Structure of this review  

2 Image analysis based microorganism quantification methods  
2.1 Image analysis technology  
2.2 Evaluation  

3 Microorganism biovolume measurement methods  
3.1 Bacteria measurement methods  
3.2 Measurement methods for other microorganisms  

4 Quantitative analysis of microorganism biovolume measurement methods with a benchmark dataset  

5 Measurement methods analysis and discussion  
5.1 Image pre-processing methods  
5.2 Image segmentation methods  
5.3 Image post-processing methods  
5.4 Analysis of potential methods  

6 Conclusion