A graphbased hierarchical clustering (GBHC) method for brain MR image segmentation is presented. Firstly
the standard graphbased method is applied to produce a coarse segmentation of brain MR image. However
the segmentation result of the graphbased method is oversegmentation because of the complicated structure of brain. So
we apply an adaptive function to control the value of parameter kin the graphbased method
which integrates the information from the highfrequency subbands of dualtree complex wavelet transform. Then
the hierarchical clustering method is used to merge the oversegmented regions in the segmentation result. The method is validated by extensive experiments using real T1weighted MR images
and compared with the stateoftheart algorithms.