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论文类型：期刊论文

发表时间：2016-07-19

发表刊物：11th International Symposium on Neural Networks (ISNN)

收录刊物：SCIE、EI、CPCI-S、Scopus

卷号：198

期号：,SI

页面范围：180-189

ISSN号：0925-2312

关键字：Image segmentation; Parallel processing; SOM neural network; Vector quantization; GPU

摘要：In this paper we develop a set of parallel algorithms for image segmentation basing on the authors' former work, the self-organizing map (SOM) based vector quantization (VQ) approach, by extending the method from serial computation to parallel processing, in order to accelerate the computation process. The parallel segmentation scheme is composed of a group of parallel algorithms for implementing the whole segmentation process, including parallel classification of the image into edge and non-edge pattern vectors, parallel training of an SOM network, parallel segmentation of the image by using the trained SOM model with VQ method, and adaptive parallel estimation of the segment number of the image being processed. In the paper, all the parallel algorithms have been implemented on graphic processing units (GPU) and applied to segmenting the human brain MRI images. The experimental results obtained in the work show that, compared with the original serial method implemented on CPU, the proposed parallel approach can achieve a significant improvement on the computation efficiency with overall speedup ratios increasing from 28.81 to 89.12 as image sizes increasing from 128 x 128 to 1024 x 1024, while keeping the segmentation performance unchanged. (C) 2016 Elsevier B.V. All rights reserved.