水下图像传输质量的实时评测模型  

Real-time evaluation model for the transmission quality of under water image

作　　者：袁飞[1] 程恩[1] 

机构地区：[1]水声通信与海洋信息技术教育部重点实验室厦门大学,厦门361005

出　　处：《仪器仪表学报》2010年第5期1132-1137,共6页Chinese Journal of Scientific Instrument

基　　金：福建省自然科学基金"青年科技人才创新项目"(2009J05154)资助

摘　　要：基于VQM客观评测模型体系,提出了一种适合水声及无线信道传输的实时图像质量评测模型。模型基于三个分项参数(结构损伤、空域边缘能量增加、空域边缘能量损耗)描述水下图像传输中压缩图像和非压缩图像的典型劣化特征。通过这三个分项参数,可有效地评测水下图像的劣化程度,统计实验表明,本实时评测模型具有较好的评测准确性、单调性和一致性。同时,模型利用了奇异值秩可压缩性,进一步压缩了参考特征的信息量,节约了实时评测所需的信道资源,为实现实时评测的业务评测目标提供了新途径。研究表明,本方法占用的额外信息开销不超过数据信息量的3%,对于水声信道、无线信道等资源受限的实时评测应用具有实用价值。此外,论文设计了基于面积理论的质量网图模型,通过网图的开闭程度,形象直观地反映图像质量的好坏,克服了传统方式在评测结果表达中存在的综合分物理意义不明确等缺陷。本实时评测模型可应用在水下监测、海底勘探等水下图像通信场合,具有较好的应用前景。The paper proposes a real-time image quality evaluation model, which is based on the VQM quality evaluation system. The model is suitable for underwater and wireless applications. The model adopts three parameters, i.e. structure error, energy augment and energy expense, to describe the distortion of the compressed or uncompressed images; and the evaluation model has good evaluation veracity, monotonicity and consistency. The model also takes the advantage of compressing the order of the singular value, which reduces the information of the reference feature, saves the channel resource and provides a new approach to realize real-time evaluation. Research shows that the additional signal cost does not exceed 3% of the total information, so this method is suitable for the applications like underwater acoustic communication or wireless communication with limited channel resource. Besides, the paper also proposes a model that uses triangle image to express the image quality, which overcomes the shortcoming of the confusion in quality score. Experiment shows that the proposed model could be widely used in underwater image communication applications, such as underwater inspection, sea exploration and so on.

关 键 词：HVS特征参数 图像质量 客观评价 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]