The knowledge of age in fish populations is of great significance in stock assessment.In this paper, a new fish age recognition method is proposed based on the image processing technique, kernel principal component analysis(KPCA) and support vector machine(SVM).Firstly, feature-extraction from otolish image is done by KPCA.Then, the fish age is recognized by using SVM.Experimental results show that the method is valid. 更多还原