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	分水嶺セグメンテーション	輪郭解析
分野	コンピュータビジョン	コンピュータビジョン
系統	Machine learning	Machine learning
提唱年	1979	1985
提唱者	Serge Beucher and Christian Lantuéjoul	Satoshi Suzuki and Keiichi Abe
種類	Morphological image segmentation	Shape and contour analysis
原典	Meyer, F. (1994). Topographic distance and watershed lines. Signal Processing, 38(1), 113–125.	Suzuki, S., & Abe, K. (1985). Topological structural analysis of digitized binary images by border following. Computer Vision, Graphics, and Image Processing, 30(1), 32–46.
別名	Watershed transform, Water shedding segmentation	Edge-based contours, Boundary analysis
関連	5	5
概要	Watershed segmentation is a morphological image processing technique that automatically segments an image into distinct regions by treating image intensity as a topographic landscape where each object corresponds to a valley. Introduced by Beucher and Lantuéjoul in 1979 and refined by Meyer, the watershed algorithm is particularly effective for separating touching or overlapping objects.	Contour analysis is the process of detecting and analyzing the boundaries of objects in images by identifying connected edges and extracting shape information. The Suzuki-Abe algorithm provides an efficient method for finding contours in binary images, enabling shape-based object classification and segmentation.