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In order to extract froth morphological feature,a bubble image adaptive segmentation method was proposed.Considering the image’s low contrast and weak froth edges,froth image was coarsely segmented by using fuzzy c means(FCM)algorithm.Through the attributes of size and shape patt spectrum,the optimal morphological structuring element was determined.According to the optimal parameters,some image noises were removed with an improved area opening and closing by reconstruction operation,which consist of image regional markers,and the bubbles were finely separated from each other by watershed transform.The experimental results show that the structural element can be determined adaptively by shape and size patt spectrum,and the froth image is segmented accurately.Compared with other froth image segmentation method,the proposed method achieves much high accuracy,based on which,the bubble size and shape features are extracted effectively.