Salient object detection (SOD) aims to determine the most visually attractive objects in an image. With the development of virtual reality technology, 360{\deg} omnidirectional image has been widely used, but the SOD task in 360{\deg} omnidirectional image is seldom studied due to its severe distortions and complex scenes. In this paper, we propose a Multi-Projection Fusion and Refinement Network (MPFR-Net) to detect the salient objects in 360{\deg} omnidirectional image. Different from the existing methods, the equirectangular projection image and four corresponding cube-unfolding images are embedded into the network simultaneously as inputs, where the cube-unfolding images not only provide supplementary information for equirectangular projection image, but also ensure the object integrity of the cube-map projection. In order to make full use of these two projection modes, a Dynamic Weighting Fusion (DWF) module is designed to adaptively integrate the features of different projections in a complementary and dynamic manner from the perspective of inter and intra features. Furthermore, in order to fully explore the way of interaction between encoder and decoder features, a Filtration and Refinement (FR) module is designed to suppress the redundant information between the feature itself and the feature. Experimental results on two omnidirectional datasets demonstrate that the proposed approach outperforms the state-of-the-art methods both qualitatively and quantitatively.

Convolutional Neural Network (CNN)-based image super-resolution (SR) has exhibited impressive success on known degraded low-resolution (LR) images. However, this type of approach is hard to hold its performance in practical scenarios when the degradation process is unknown. Despite existing blind SR methods proposed to solve this problem using blur kernel estimation, the perceptual quality and reconstruction accuracy are still unsatisfactory. In this paper, we analyze the degradation of a high-resolution (HR) image from image intrinsic components according to a degradation-based formulation model. We propose a components decomposition and co-optimization network (CDCN) for blind SR. Firstly, CDCN decomposes the input LR image into structure and detail components in feature space. Then, the mutual collaboration block (MCB) is presented to exploit the relationship between both two components. In this way, the detail component can provide informative features to enrich the structural context and the structure component can carry structural context for better detail revealing via a mutual complementary manner. After that, we present a degradation-driven learning strategy to jointly supervise the HR image detail and structure restoration process. Finally, a multi-scale fusion module followed by an upsampling layer is designed to fuse the structure and detail features and perform SR reconstruction. Empowered by such degradation-based components decomposition, collaboration, and mutual optimization, we can bridge the correlation between component learning and degradation modelling for blind SR, thereby producing SR results with more accurate textures. Extensive experiments on both synthetic SR datasets and real-world images show that the proposed method achieves the state-of-the-art performance compared to existing methods.

Existing convolutional neural networks (CNN) based image super-resolution (SR) methods have achieved impressive performance on bicubic kernel, which is not valid to handle unknown degradations in real-world applications. Recent blind SR methods suggest to reconstruct SR images relying on blur kernel estimation. However, their results still remain visible artifacts and detail distortion due to the estimation errors. To alleviate these problems, in this paper, we propose an effective and kernel-free network, namely DSSR, which enables recurrent detail-structure alternative optimization without blur kernel prior incorporation for blind SR. Specifically, in our DSSR, a detail-structure modulation module (DSMM) is built to exploit the interaction and collaboration of image details and structures. The DSMM consists of two components: a detail restoration unit (DRU) and a structure modulation unit (SMU). The former aims at regressing the intermediate HR detail reconstruction from LR structural contexts, and the latter performs structural contexts modulation conditioned on the learned detail maps at both HR and LR spaces. Besides, we use the output of DSMM as the hidden state and design our DSSR architecture from a recurrent convolutional neural network (RCNN) view. In this way, the network can alternatively optimize the image details and structural contexts, achieving co-optimization across time. Moreover, equipped with the recurrent connection, our DSSR allows low- and high-level feature representations complementary by observing previous HR details and contexts at every unrolling time. Extensive experiments on synthetic datasets and real-world images demonstrate that our method achieves the state-of-the-art against existing methods. The source code can be found at https://github.com/Arcananana/DSSR.

提出了基于视觉变压器（VLT）的新型场景文本识别器。受NLP领域的Levenshtein Transformer的启发，提出的方法（命名为Levenshtein OCR和Short Levocr）探索了一种自动从裁剪自然图像中自动转录文本内容的替代方法。具体而言，我们将场景文本识别的问题视为迭代序列完善过程。由纯视觉模型产生的初始预测序列被编码并馈送到跨模式变压器中，以与视觉特征相互作用并融合，以逐渐近似地面真理。改进过程是通过两个基本字符级操作完成的：删除和插入，它们是通过模仿学习来学习的，并允许并行解码，动态长度变化和良好的解释性。定量实验清楚地表明，Levocr在标准基准上实现最新性能，定性分析验证了拟议的Levocr算法的有效性和优势。代码将很快发布。

多年来，场景文本识别（STR）一直是计算机视觉的积极研究主题。为了解决这个具有挑战性的问题，已经提出了许多创新的方法，并将语言知识纳入STR模型最近已成为一个显着的趋势。在这项工作中，我们首先从视觉变压器（VIT）的最新进展中汲取灵感来构建一个概念上简单而强大的视觉str模型，该模型建立在VIT和胜过以前的现场文本识别的先前最新模型，包括纯视觉模型和语言增强方法。为了整合语言知识，我们进一步提出了一种多粒性预测策略，以隐式方式将信息从语言模式注入模型，即NLP中广泛使用的子字表示（BPE和Wordpiece）被引入输出空间，除了传统的字符级别表示外，不采用独立语言模型（LM）。所得的算法（称为MGP-STR）能够将Str的性能包络提高到更高的水平。具体而言，它的平均识别精度在标准基准上达到93.35％。代码将很快发布。

完全监督的显着对象检测（SOD）方法取得了长足的进步，但是这种方法通常依赖大量的像素级注释，这些注释耗时且耗时。在本文中，我们专注于混合标签下的新的弱监督SOD任务，其中监督标签包括传统无监督方法生成的大量粗标签和少量的真实标签。为了解决此任务中标签噪声和数量不平衡问题的问题，我们设计了一个新的管道框架，采用三种复杂的培训策略。在模型框架方面，我们将任务分解为标签细化子任务和显着对象检测子任务，它们相互合作并交替训练。具体而言，R-NET设计为配备有指导和聚合机制的搅拌机的两流编码器模型（BGA），旨在纠正更可靠的伪标签的粗标签，而S-NET是可更换的。由当前R-NET生成的伪标签监督的SOD网络。请注意，我们只需要使用训练有素的S-NET进行测试。此外，为了确保网络培训的有效性和效率，我们设计了三种培训策略，包括替代迭代机制，小组智慧的增量机制和信誉验证机制。五个草皮基准的实验表明，我们的方法在定性和定量上都针对弱监督/无监督/无监督的方法实现了竞争性能。

尽管已经开发了疫苗，并且国家疫苗接种率正在稳步提高，但2019年冠状病毒病（COVID-19）仍对世界各地的医疗保健系统产生负面影响。在当前阶段，从CT图像中自动分割肺部感染区域对于诊断和治疗COVID-19至关重要。得益于深度学习技术的发展，已经提出了一些针对肺部感染细分的深度学习解决方案。但是，由于分布分布，复杂的背景干扰和界限模糊，现有模型的准确性和完整性仍然不令人满意。为此，我们在本文中提出了一个边界引导的语义学习网络（BSNET）。一方面，结合顶级语义保存和渐进式语义集成的双分支语义增强模块旨在建模不同的高级特征之间的互补关系，从而促进产生更完整的分割结果。另一方面，提出了镜像对称边界引导模块，以以镜像对称方式准确检测病变区域的边界。公开可用数据集的实验表明，我们的BSNET优于现有的最新竞争对手，并实现了44 fps的实时推理速度。

Covid-19的传播给世界带来了巨大的灾难，自动分割感染区域可以帮助医生快速诊断并减少工作量。但是，准确和完整的分割面临一些挑战，例如散射的感染区分布，复杂的背景噪声和模糊的分割边界。为此，在本文中，我们提出了一个新的网络，用于从CT图像（名为BCS-NET）的自动covid-19肺部感染分割，该网络考虑了边界，上下文和语义属性。 BCS-NET遵循编码器架构，更多的设计集中在解码器阶段，该阶段包括三个逐渐边界上下文 - 语义重建（BCSR）块。在每个BCSR块中，注意引导的全局上下文（AGGC）模块旨在通过突出显示重要的空间和边界位置并建模全局上下文依赖性来学习解码器最有价值的编码器功能。此外，语义指南（SG）单元通过在中间分辨率上汇总多规模的高级特征来生成语义指南图来完善解码器特征。广泛的实验表明，我们提出的框架在定性和定量上都优于现有竞争对手。

事实证明，多模式文档预训练的模型在各种视觉上富裕的文档理解（VRDU）任务中非常有效。尽管现有的文档预先培训模型在VRDU的标准基准上取得了出色的性能，但它们建模和利用文档上的视觉和语言之间的互动的方式阻碍了他们无法获得更好的概括能力和更高的准确性。在这项工作中，我们主要从监督信号的角度研究了VRDU视觉联合表示学习的问题。具体而言，提出了一种称为BI-VLDOC的预训练范式，其中设计了双向视觉监督策略和视觉性混合注意机制，以完全探索并利用这两种方式之间的相互作用，以学习更强的交叉交叉方式 - 具有更丰富语义的模式文档表示。 Bi-Vldoc受益于学习丰富的跨模式文档表示形式，显着提高了三个广泛使用文档的最新性能，理解基准，包括形式的理解（从85.14％到93.44％），收据信息提取（从96.01％到97.84％）和文档分类（从96.08％到97.12％）。在文档视觉质量检查中，BI-VLDOC与以前的单个模型方法相比，实现了最先进的性能。

深神经网络（DNNS）在各种机器学习（ML）应用程序中取得了巨大成功，在计算机视觉，自然语言处理和虚拟现实等中提供了高质量的推理解决方案。但是，基于DNN的ML应用程序也带来计算和存储要求的增加了很多，对于具有有限的计算/存储资源，紧张的功率预算和较小形式的嵌入式系统而言，这尤其具有挑战性。挑战还来自各种特定应用的要求，包括实时响应，高通量性能和可靠的推理准确性。为了应对这些挑战，我们介绍了一系列有效的设计方法，包括有效的ML模型设计，定制的硬件加速器设计以及硬件/软件共同设计策略，以启用嵌入式系统上有效的ML应用程序。