手法を比較

	分水嶺セグメンテーション	ヒストグラム均等化
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	1970s
提唱者	Serge Beucher and Christian Lantuéjoul	Signal processing community
種類	Morphological image segmentation	Contrast enhancement and preprocessing
原典	Meyer, F. (1994). Topographic distance and watershed lines. Signal Processing, 38(1), 113–125.	Gonzalez, R. C., & Woods, R. E. (1992). Digital Image Processing. Addison-Wesley, 2nd edition, Chapter 3.
別名	Watershed transform, Water shedding segmentation	Histogram stretching, Contrast enhancement
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.	Histogram equalization is an image preprocessing technique that redistributes pixel intensities to improve contrast and visibility of details. By spreading the histogram of pixel values evenly across the available range, histogram equalization enhances images with poor contrast, making features more visually distinct and easier to process algorithmically.