结合空间域与变换域特征提取的盲立体图像质量评价

Blind Stereo Image Quality Evaluation Based on Spatial Domain and Transform Domain Feature Extraction

针对立体图像质量预测准确性不足的问题,该文提出了一种结合空间域和变换域提取质量感知特征的无参考立体图像质量评价模型。在空间域和变换域分别提取输入的左、右视图的自然场景统计特征,并在变换域提取合成独眼图的自然场景统计特征,然后将其输入到支持向量回归(SVR)中,训练从特征域到质量分数域的预测模型,并以此建立SIQA客观质量评价模型。在4个公开的立体图像数据库上与一些主流的立体图像质量评价算法进行对比,以在LIVE 3D Phase I图像库中的性能测试为例,Spearman秩相关系数、皮尔逊线性相关系数和均方根误差分别达到0.967,0.946和5.603,验证了所提算法的有效性。

For the problem of insufficient accuracy of stereo image quality prediction,a blind stereoscopic image quality assessment model combining spatial domain and transform domain to extract quality-aware features is proposed.Firstly,the statistical features of the natural scenes in the left and right views are extracted respectively in space domain and transformation domain,and statistical features of natural scenes from synthetic monocular images is extracted in transformation domain.Finally,Support Vector Regression(SVR)is used to train a stereoscopic image quality evaluation model from the feature domain to the quality score domain,so as to establish SIQA objective quality evaluation model.The performance of the proposed method is compared with some state-of-the-art full-reference,reduced-reference and no-reference stereoscopic image quality evaluation algorithms on the four public stereo image databases,taking the performance test in live 3D phase I image library as an example.SROCC of 0.967,PLCC of 0.946 and RMSE of 5.603 are achieved,which verifies the effectiveness of the proposed algorithm.