Abstract 1. Introduction 2. Medium and Method 2.1 Medium 2.2 Experimental Apparatus 2.3 Otsu's Variance Based Thresholding Method 2.4 Moment and Principle axis 3. The proposed algorithm for measuring the feature and size of cell 4. Experimental results and discussions 4.1 Experimental Method 4.2 Experimental results and discussions 5. Conclusion Reference