1. R. C. Gonzalez and R. E. Woods,Digital Image Processing, Prentice Hall, Upper Saddle River, NJ (2002).
2. W. K. Pratt,Digital Image Processing, John Wiley and Sons, Hoboken, NJ (1978).
3. Y. C. Shao and L. C. Chen, “Object segmentation in elevation space using mathematical morphology,” inProc. 22nd Asian Conf. on Remote Sensing, pp. 227–232, Singapore (2001).
4. Morphological grayscale reconstruction in image analysis: applications and efficient algorithms