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Abstract: Based on the visual sampling principle, the generalized visual sampling based clustering approach VSC is proposed. The clustering approach incorporates the visual sampling principle with the famous Weber law such that it has two distinctive advantages: firstly, it is insensitive to initial conditions; secondly, the reasonable clustering number can be effectively determined by the new Weber-law-based clustering validity index. The experimental results demonstrate its success. Moreover, the link relationship between our approach and algorithm SCA (Similarity-based Clustering Algorithm) recently proposed by Yang Miin-Shen, et al. (2004) is derived. Both theoretic analyses and experimental results show that in many cases, the approach here has almost the same clustering results as algorithm SCA. This fact reveals that the approach can be used to overcome the drawback of SCA, i.e., the parameter is very difficult to be well determined.