论文标题
计算机图形生成的图像的主观质量评估
Subjective Quality Assessment for Images Generated by Computer Graphics
论文作者
论文摘要
随着渲染技术的开发，计算机图形生成的图像（CGI）已被广泛用于实践应用程序场景，例如建筑设计，视频游戏，模拟器，电影等。与自然场景图像（NSIS）不同，CGIS的扭曲通常是由差的差异设置和有限的计算资源引起的。更重要的是，某些CGI也可能遭受云游戏和流媒体等传输系统中的压缩变形。但是，已经提出了有限的工作来解决计算机图形生成图像的质量评估（CG-IQA）的问题。因此，在本文中，我们建立了一个大规模的主观CG-IQA数据库，以应对CG-IQA任务的挑战。我们通过以前的数据库和个人收集收集25,454个野外CGI。清洁数据后，我们仔细选择1,200 CGI来进行主观实验。在我们的数据库中测试了几种流行的无参考图像质量评估（NR-IQA）方法。实验结果表明，基于手工制作的方法与主观判断和基于深度学习的方法获得了相对更好的性能，这表明当前的NR-IQA模型不适合CG-IQA任务，并且迫切需要更有效的模型。
With the development of rendering techniques, computer graphics generated images (CGIs) have been widely used in practical application scenarios such as architecture design, video games, simulators, movies, etc. Different from natural scene images (NSIs), the distortions of CGIs are usually caused by poor rending settings and limited computation resources. What's more, some CGIs may also suffer from compression distortions in transmission systems like cloud gaming and stream media. However, limited work has been put forward to tackle the problem of computer graphics generated images' quality assessment (CG-IQA). Therefore, in this paper, we establish a large-scale subjective CG-IQA database to deal with the challenge of CG-IQA tasks. We collect 25,454 in-the-wild CGIs through previous databases and personal collection. After data cleaning, we carefully select 1,200 CGIs to conduct the subjective experiment. Several popular no-reference image quality assessment (NR-IQA) methods are tested on our database. The experimental results show that the handcrafted-based methods achieve low correlation with subjective judgment and deep learning based methods obtain relatively better performance, which demonstrates that the current NR-IQA models are not suitable for CG-IQA tasks and more effective models are urgently needed.
