6O'Donnell T K, Goyne K W, Miles R J, et al. Identification and quantification of soil redoximorphic features by digital image processing [J]. Geoderma, 2010,157:86 -96.
7Sun W N, Chen T, Chen C X, et al. A study on membrance morphology by digital image processing[J]. Journal of Membrance Science, 2007,305 : 93 - 102.