Table 1.

Runtimes for producing a segmentation map

Dataset	(n×p)	Method	Neighborhood radius
			r=2	r=3	r=4
Rat brain	(20185×71)	SA	17 s	35 s	49 s
		SASA	19 s	32 s	49 s
		k-means*		10 s
		Denoising+HDDC*		17 min
		Denoising+kmeans*		2 min
		PCA+hierarchical*		25 s
Tumor	(27 960×62)	SA	23 s	41 s	62 s
		SASA	25 s	39 s	62 s

Runtimes on ThinkPad laptop with Intel i5 Core 2.4 GHz; data pre-processing and peak picking are not included; q=20, k=10.

*No neighborhood is exploited.