Under Display相机为手机制造商提供了一个充满希望的机会，通过将相机定位在半透明OLED屏幕后面来实现无边框显示。不幸的是，这种成像系统由于光衰减和衍射效应而遭受严重的图像退化。在这项工作中，我们提出了深度Atrous引导滤波器（DAGF），一个两阶段，端到端的方法，图像复原在UDC系统。低分辨率网络首先以低分辨率恢复图像质量，随后被引导滤波器网络用作滤波输入以产生高分辨率输出。除了初始下采样，我们的低分辨率网络还使用多个并行的无环卷积来保持空间分辨率，并模拟多尺度处理。我们的方法的能力，直接训练的百万像素图像的结果在显着的性能提高。我们还提出了一个简单的模拟方案来预训练我们的模型并提高性能。我们的整体框架在RLQ-TOD'20 UDC挑战赛中分别在POLED和TOLED显示屏领域排名第二和第五。
英文摘要：
Under Display Cameras present a promising opportunity for phone manufacturers to achieve bezel-free displays by positioning the camera behind semi-transparent OLED screens. Unfortunately, such imaging systems suffer from severe image degradation due to light attenuation and diffraction effects. In this work, we present Deep Atrous Guided Filter (DAGF), a two-stage, end-to-end approach for image restoration in UDC systems. A Low-Resolution Network first restores image quality at low-resolution, which is subsequently used by the Guided Filter Network as a filtering input to produce a high-resolution output. Besides the initial downsampling, our low-resolution network uses multiple, parallel atrous convolutions to preserve spatial resolution and emulates multi-scale processing. Our approach's ability to directly train on megapixel images results in significant performance improvement. We additionally propose a simple simulation scheme to pre-train our model and boost performance. Our overall framework ranks 2nd and 5th in the RLQ-TOD'20 UDC Challenge for POLED and TOLED displays, respectively.
UDC-UNet: Under-Display Camera Image Restoration via U-Shape Dynamic Network
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences（中国科学院深圳先进技术研究院）；University of Chinese Academy of Sciences（中国科学院大学）；University of Macau（澳门大学）；Shanghai AI Laboratory（上海人工智能实验室）
Segmentation Guided Sparse Transformer for Under-Display Camera Image Restoration
Shenzhen Campus of Sun Yat-sen University（中山大学深圳校区）；Hong Kong University of Science and Technology（香港科技大学）；State Key Laboratory for Novel Software Technology, Nanjing University（南京大学计算机软件新技术国家重点实验室）；Samsung Research China - Beijing (SRC-B)（三星中国研究院北京分部）；Harbin Institute of Technology, Shenzhen（哈尔滨工业大学深圳校区）；SAMSUNG Electronics（三星电子）
State Key Lab for Novel Software Technology, Nanjing University（南京大学现代软件技术国家重点实验室）；Australian National University（澳大利亚国立大学）；Shenzhen Campus of Sun Yat-sen University（中山大学深圳校区）；Samsung Research China-Beijing (SRC-B)（三星中国研究院北京分部）；Imperial College London（伦敦帝国学院）
Combined Flicker-banding and Moire Removal for Screen-Captured Images
Shanghai Jiao Tong University, Shanghai, China（上海交通大学）；Central Media Technology Institute, Huawei, China（华为中央媒体技术研究所）；Department of XXX, University of YYY, Location, Country（YYY大学XXX系）；School of ZZZ, Institute of WWW, Location, Country（ZZZ学院WWW研究所）
From Fog Chamber to Aircraft Window: Pixel-Registered Imaging and Synthetic Fine-Tuning Enable Cross-Domain Defogging
Department of Electrical and Computer Engineering, University of Utah（犹他大学电气与计算机工程系）；U.S. Naval Research Laboratory Remote Sensing Division（美国海军研究实验室远程传感部门）
MvKSR: Multi-view Knowledge-guided Scene Recovery for Hazy and Rainy Degradation
The Hong Kong Polytechnic University（香港理工大学）；Wuhan University of Technology（武汉理工大学）；Wuhan Baosight Software Co., Ltd（武汉宝信软件有限公司）；Singapore Management University（新加坡管理大学）
UDC-VIT: A Real-World Video Dataset for Under-Display Cameras
Dept. of Data Science, Seoul National University（数据科学系，首尔国立大学）；Dept. of Computer Science and Engineering, Seoul National University（计算机科学与工程系，首尔国立大学）；Research Center, Samsung Display Co., Ltd.（三星显示公司研究部）；Mobile Display Electronics Development Team, Samsung Display Co., Ltd.（三星显示公司移动显示电子开发团队）
Deconvolution of vibroacoustic images using a simulation model based on a three dimensional point spread function
Instituto de Matemática e Estatística, Universidade de São Paulo（圣保罗大学数学与统计研究所）；Universidade Federal de São Carlos（圣卡洛斯联邦大学）；Mayo Clinic College of Medicine（梅奥诊所医学院）；Universidade Federal de Alagoas（阿拉戈斯联邦大学）
MoiréNet: A Compact Dual-Domain Network for Image Demoiréing
School of Future Science and Engineering, Soochow University, China（未来科学与工程学院，苏州大学）；Clobotics, China（中国Clobotics公司）；Fraunhofer Institute for Applied Information Technology, Germany（德国应用信息技术研究所）；School of Mathematical and Computer Sciences, Heriot-Watt University (Malaysia Campus), Malaysia（数学与计算机科学学院，赫瑞-瓦特大学（马来西亚校区））
Learning Weighting Map for Bit-Depth Expansion within a Rational Range
School of Software, Dalian University of Technology（大连理工大学软件学院）；International School of Information Science and Engineering, Dalian University of Technology（大连理工大学国际信息与工程学院）；School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School（北京大学深圳研究生院电子与计算机工程学院）
