计算机科学
人工智能
编码器
编码(集合论)
计算机视觉
特征(语言学)
领域(数学分析)
照相手机
班级(哲学)
图像(数学)
模式识别(心理学)
计算机图形学(图像)
数学分析
语言学
哲学
数学
集合(抽象数据类型)
程序设计语言
操作系统
作者
Huanjing Yue,Yijia Cheng,Yan Mao,Cong Cao,Jingyu Yang
标识
DOI:10.1109/tmm.2022.3198333
摘要
Capturing screen content by smart-phone cameras has become a daily routine to record or share instant information from display screens for convenience. However, these recaptured screen images are often degraded by moiré patterns and usually present color cast against the original screen source. We observe that performing demoiréing in raw domain before feeding into the image signal processor (ISP) is more effective than demoiréing in the sRGB domain as done in recent demoiréing works. In this paper, we investigate the demoiréing of raw images through a class-specific learning approach. To this end, we build the first well-aligned raw moiré image dataset by pixel-wise alignment between the recaptured images and source ones. Noting that document images occupy a large portion of screen contents and have different properties from generic images, we propose a class-specific learning strategy for textual images and natural color images. In addition, to deal with moiré patterns with various scales, a multi-scale encoder with multi-level feature fusion is proposed. The shared encoder enables us to extract rich representations for the two kinds of contents and the class-specific decoders benefit the specific content reconstruction by focusing on targeted representations. Experiment results demonstrate that our method achieves state-of-the-art demoiréing performance. We have released the code and dataset in https://github.com/tju-chengyijia/RDNet
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