Perceptual Quality Assessment of Omnidirectional Images:Subjective Experiment and Objective Model Evaluation

作     者：DUAN Huiyu ZHAI Guangtao MIN Xiongkuo ZHU Yucheng FANG Yi YANG Xiaokang 

作者机构：Institute of Image Communication and Network EngineeringShanghai Jiao Tong University 

出 版 物：《ZTE Communications》 (中兴通讯技术（英文版）)

年 卷 期：2019年第17卷第1期

页      面：38-47页

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：perceptual quality assessment omnidirectional images subjective experiment objective model evaluation visual saliency 

摘      要：Virtual reality(VR) environment can provide immersive experience to *** the VR environment, providing a good quality of experience is extremely ***, in this paper, we present an image quality assessment(IQA) study on omnidirectional images. We first build an omnidirectional IQA(OIQA) database, including 16 source images with their corresponding 320 distorted images. We add four commonly encountered distortions. These distortions are JPEG compression, JPEG2000 compression, Gaussian blur, and Gaussian noise. Then we conduct a subjective quality evaluation study in the VR environment based on the OIQA database. Considering that visual attention is more important in VR environment, head and eye movement data are also tracked and collected during the quality rating experiments. The 16 raw and their corresponding distorted images,subjective quality assessment scores, and the head-orientation data and eye-gaze data together constitute the OIQA database. Based on the OIQA database, we test some state-of-the-art full-reference IQA(FR-IQA) measures on equirectangular format or cubic formatomnidirectional images. The results show that applying FR-IQA metrics on cubic format omnidirectional images could improve their performance. The performance of some FR-IQA metrics combining the saliency weight of three different types are also tested based on our database. Some new phenomena different from traditional IQA are observed.