[1] [1] HEIJMANS H J A M. Connected morphological operators for binary images[J]. Computer Vision and Image Understanding, 1999,73(1):99-120.

[2] [2] SALEMBIER P,SERRA J. Flat zones filtering connected operators and filters by reconstruction[J]. IEEE Transactions on Image Processing,1995,4(8):1153-1160.

[3] [3] CRESPO J,SERRA J,SCHAFER R W. Theoretical aspects of morphological filters by reconstruction[J]. Signal Processing, 1995,47(2):201-225.

[4] [4] MEIJSTER A,WILKINSON M H F. A comparison of algorithms for connected set openings and closings[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence,2002,24(4):484-494.

[5] [5] VINCENT L. Morphological Grayscale reconstruction in image analysis:applications and efficient algorithms[J]. IEEE Transactions on Image Processing,1993,2(2):176-201.

[6] [6] BLEAU A,LEON L J. Watershed-based segmentation and region merging[J]. Computer Vision and Image Understanding, 2000,77(3):317-370.

[7] [7] KIM J B,KIM H J. Multiresolution-based watersheds for efficient image segmentation[J]. Pattern Recognition Letters, 2003,24(1-3):473-488.