单元实例分割是一项旨在针对图像中每个单元格的联合检测和分割的新任务。最近,在此任务中应用了许多实例细分方法。尽管取得了巨大的成功,但仍然存在两个主要弱点,这是由于定位细胞中心点的不确定性而引起的。首先,可以很容易地将密集的填充细胞识别到一个细胞中。其次,细胞的细胞很容易被识别为两个细胞。为了克服这两个弱点,我们提出了一个基于多控制回归指南的新细胞实例分割网络。借助多功能回归指导,该网络具有不同视图中每个单元格的能力。具体而言,我们首先提出了一种高斯指导注意机制,以使用高斯标签来指导网络的注意力。然后,我们提出了一个点回归模块,以帮助细胞中心的回归。最后,我们利用上述两个模块的输出来进一步指导实例分割。借助多轮回归指导,我们可以充分利用不同区域的特征,尤其是细胞的中心区域。我们在基准数据集,DSB2018,CA2.5和SCIS上进行了广泛的实验。令人鼓舞的结果表明,我们的网络实现了SOTA(最先进的)性能。在DSB2018和CA2.5上,我们的网络超过1.2%(AP50)。尤其是在SCIS数据集上,我们的网络的性能较大(AP50高3.0%)。可视化和分析进一步证明了我们提出的方法是可以解释的。
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Cascade is a classic yet powerful architecture that has boosted performance on various tasks. However, how to introduce cascade to instance segmentation remains an open question. A simple combination of Cascade R-CNN and Mask R-CNN only brings limited gain. In exploring a more effective approach, we find that the key to a successful instance segmentation cascade is to fully leverage the reciprocal relationship between detection and segmentation. In this work, we propose a new framework, Hybrid Task Cascade (HTC), which differs in two important aspects: (1) instead of performing cascaded refinement on these two tasks separately, it interweaves them for a joint multi-stage processing; (2) it adopts a fully convolutional branch to provide spatial context, which can help distinguishing hard foreground from cluttered background. Overall, this framework can learn more discriminative features progressively while integrating complementary features together in each stage. Without bells and whistles, a single HTC obtains 38.4% and 1.5% improvement over a strong Cascade Mask R-CNN baseline on MSCOCO dataset. Moreover, our overall system achieves 48.6 mask AP on the test-challenge split, ranking 1st in the COCO 2018 Challenge Object Detection Task. Code is available at: https://github.com/ open-mmlab/mmdetection.
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大多数最先进的实例级人类解析模型都采用了两阶段的基于锚的探测器,因此无法避免启发式锚盒设计和像素级别缺乏分析。为了解决这两个问题,我们设计了一个实例级人类解析网络,该网络在像素级别上无锚固且可解决。它由两个简单的子网络组成:一个用于边界框预测的无锚检测头和一个用于人体分割的边缘引导解析头。无锚探测器的头继承了像素样的优点,并有效地避免了对象检测应用中证明的超参数的敏感性。通过引入部分感知的边界线索,边缘引导的解析头能够将相邻的人类部分与彼此区分开,最多可在一个人类实例中,甚至重叠的实例。同时,利用了精炼的头部整合盒子级别的分数和部分分析质量,以提高解析结果的质量。在两个多个人类解析数据集(即CIHP和LV-MHP-V2.0)和一个视频实例级人类解析数据集(即VIP)上进行实验,表明我们的方法实现了超过全球级别和实例级别的性能最新的一阶段自上而下的替代方案。
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本文介绍了端到端的实例分段框架,称为SOIT,该段具有实例感知变压器的段对象。灵感来自Detr〜\ Cite {carion2020end},我们的方法视图实例分段为直接设置预测问题,有效地消除了对ROI裁剪,一对多标签分配等许多手工制作组件的需求,以及非最大抑制( nms)。在SOIT中,通过在全局图像上下文下直接地将多个查询直接理解语义类别,边界框位置和像素 - WISE掩码的一组对象嵌入。类和边界盒可以通过固定长度的向量轻松嵌入。尤其是由一组参数嵌入像素方面的掩模以构建轻量级实例感知变压器。之后,实例感知变压器产生全分辨率掩码,而不涉及基于ROI的任何操作。总的来说,SOIT介绍了一个简单的单级实例分段框架,它是无乐和NMS的。 MS Coco DataSet上的实验结果表明,优于最先进的实例分割显着的优势。此外,在统一查询嵌入中的多个任务的联合学习还可以大大提高检测性能。代码可用于\ url {https://github.com/yuxiaodonghri/soit}。
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We present a new, embarrassingly simple approach to instance segmentation. Compared to many other dense prediction tasks, e.g., semantic segmentation, it is the arbitrary number of instances that have made instance segmentation much more challenging. In order to predict a mask for each instance, mainstream approaches either follow the "detect-then-segment" strategy (e.g., Mask R-CNN), or predict embedding vectors first then use clustering techniques to group pixels into individual instances. We view the task of instance segmentation from a completely new perspective by introducing the notion of "instance categories", which assigns categories to each pixel within an instance according to the instance's location and size, thus nicely converting instance segmentation into a single-shot classification-solvable problem. We demonstrate a much simpler and flexible instance segmentation framework with strong performance, achieving on par accuracy with Mask R-CNN and outperforming recent single-shot instance segmenters in accuracy. We hope that this simple and strong framework can serve as a baseline for many instance-level recognition tasks besides instance segmentation. Code is available at https://git.io/AdelaiDet
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准确,快速的双核细胞(BC)检测在预测白血病和其他恶性肿瘤的风险中起着重要作用。但是,手动显微镜计数是耗时的,缺乏客观性。此外,由于bc显微镜整体幻灯片图像(WSIS)的染色质量和多样性的限制,传统的图像处理方法是无助的。为了克服这一挑战,我们提出了一种基于深度学习的结构启发的两阶段检测方法,该方法是基于深度学习的,该方法是在斑块级别的WSI-Level和细粒度分类处实施BCS粗略检测的级联。粗糙检测网络是基于用于细胞检测的圆形边界框的多任务检测框架,以及用于核检测的中心关键点。圆的表示降低了自由度,与通常的矩形盒子相比,减轻周围杂质的影响,并且在WSI中可能是旋转不变的。检测细胞核中的关键点可以帮助网络感知,并在后来的细粒分类中用于无监督的颜色层分割。精细的分类网络由基于颜色层掩模的监督和基于变压器的关键区域选择模块组成的背景区域抑制模块,其全局建模能力。此外,首先提出了无监督和未配对的细胞质发生器网络来扩展长尾分配数据集。最后,在BC多中心数据集上进行实验。拟议的BC罚款检测方法在几乎所有评估标准中都优于其他基准,从而为诸如癌症筛查等任务提供了澄清和支持。
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Recent state-of-the-art one-stage instance segmentation model SOLO divides the input image into a grid and directly predicts per grid cell object masks with fully-convolutional networks, yielding comparably good performance as traditional two-stage Mask R-CNN yet enjoying much simpler architecture and higher efficiency. We observe SOLO generates similar masks for an object at nearby grid cells, and these neighboring predictions can complement each other as some may better segment certain object part, most of which are however directly discarded by non-maximum-suppression. Motivated by the observed gap, we develop a novel learning-based aggregation method that improves upon SOLO by leveraging the rich neighboring information while maintaining the architectural efficiency. The resulting model is named SODAR. Unlike the original per grid cell object masks, SODAR is implicitly supervised to learn mask representations that encode geometric structure of nearby objects and complement adjacent representations with context. The aggregation method further includes two novel designs: 1) a mask interpolation mechanism that enables the model to generate much fewer mask representations by sharing neighboring representations among nearby grid cells, and thus saves computation and memory; 2) a deformable neighbour sampling mechanism that allows the model to adaptively adjust neighbor sampling locations thus gathering mask representations with more relevant context and achieving higher performance. SODAR significantly improves the instance segmentation performance, e.g., it outperforms a SOLO model with ResNet-101 backbone by 2.2 AP on COCO \texttt{test} set, with only about 3\% additional computation. We further show consistent performance gain with the SOLOv2 model.
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盒子监督的实例分割最近吸引了大量的研究工作,而在空中图像域中则收到很少的关注。与通用物体集合相比,空中对象具有大型内部差异和阶级相似性与复杂的背景。此外,高分辨率卫星图像中存在许多微小的物体。这使得最近的一对亲和力建模方法不可避免地涉及具有劣势的噪声监督。为了解决这些问题,我们提出了一种新颖的空中实例分割方法,该方法驱动网络为空中对象的一系列级别设置功能,只有盒子注释以端到端的方式。具有精心设计的能量函数的级别集方法而不是学习成对亲和力将对象分段视为曲线演进,这能够准确地恢复对象的边界并防止来自无法区分的背景和类似对象的干扰。实验结果表明,所提出的方法优于最先进的盒子监督实例分段方法。源代码可在https://github.com/liwentomng/boxLevelset上获得。
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Letting a deep network be aware of the quality of its own predictions is an interesting yet important problem. In the task of instance segmentation, the confidence of instance classification is used as mask quality score in most instance segmentation frameworks. However, the mask quality, quantified as the IoU between the instance mask and its ground truth, is usually not well correlated with classification score. In this paper, we study this problem and propose Mask Scoring R-CNN which contains a network block to learn the quality of the predicted instance masks. The proposed network block takes the instance feature and the corresponding predicted mask together to regress the mask IoU. The mask scoring strategy calibrates the misalignment between mask quality and mask score, and improves instance segmentation performance by prioritizing more accurate mask predictions during COCO AP evaluation. By extensive evaluations on the COCO dataset, Mask Scoring R-CNN brings consistent and noticeable gain with different models, and outperforms the state-of-the-art Mask R-CNN. We hope our simple and effective approach will provide a new direction for improving instance segmentation. The source code of our method is available at https:// github.com/zjhuang22/maskscoring_rcnn. * The work was done when Zhaojin Huang was an intern in Horizon Robotics Inc.
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两阶段和基于查询的实例分段方法取得了显着的结果。然而,他们的分段面具仍然非常粗糙。在本文中,我们呈现了用于高质量高效的实例分割的掩模转发器。我们的掩模转发器代替常规密集的张量,而不是在常规密集的张量上进行分解,并表示作为Quadtree的图像区域。我们基于变换器的方法仅处理检测到的错误易于树节点,并并行自我纠正其错误。虽然这些稀疏的像素仅构成总数的小比例,但它们对最终掩模质量至关重要。这允许掩模转换器以低计算成本预测高精度的实例掩模。广泛的实验表明,掩模转发器在三个流行的基准上优于当前实例分段方法,显着改善了COCO和BDD100K上的大型+3.0掩模AP的+3.0掩模AP的大余量和CityScapes上的+6.6边界AP。我们的代码和培训的型号将在http://vis.xyz/pub/transfiner提供。
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In contrast to fully supervised methods using pixel-wise mask labels, box-supervised instance segmentation takes advantage of simple box annotations, which has recently attracted increasing research attention. This paper presents a novel single-shot instance segmentation approach, namely Box2Mask, which integrates the classical level-set evolution model into deep neural network learning to achieve accurate mask prediction with only bounding box supervision. Specifically, both the input image and its deep features are employed to evolve the level-set curves implicitly, and a local consistency module based on a pixel affinity kernel is used to mine the local context and spatial relations. Two types of single-stage frameworks, i.e., CNN-based and transformer-based frameworks, are developed to empower the level-set evolution for box-supervised instance segmentation, and each framework consists of three essential components: instance-aware decoder, box-level matching assignment and level-set evolution. By minimizing the level-set energy function, the mask map of each instance can be iteratively optimized within its bounding box annotation. The experimental results on five challenging testbeds, covering general scenes, remote sensing, medical and scene text images, demonstrate the outstanding performance of our proposed Box2Mask approach for box-supervised instance segmentation. In particular, with the Swin-Transformer large backbone, our Box2Mask obtains 42.4% mask AP on COCO, which is on par with the recently developed fully mask-supervised methods. The code is available at: https://github.com/LiWentomng/boxlevelset.
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现有的实例分割方法已经达到了令人印象深刻的表现,但仍遭受了共同的困境:一个实例推断出冗余表示(例如,多个框,网格和锚点),这导致了多个重复的预测。因此,主流方法通常依赖于手工设计的非最大抑制(NMS)后处理步骤来选择最佳预测结果,这会阻碍端到端训练。为了解决此问题,我们建议一个称为Uniinst的无盒和无端机实例分割框架,该框架仅对每个实例产生一个唯一的表示。具体而言,我们设计了一种实例意识到的一对一分配方案,即仅产生一个表示(Oyor),该方案根据预测和地面真相之间的匹配质量,动态地为每个实例动态分配一个独特的表示。然后,一种新颖的预测重新排列策略被优雅地集成到框架中,以解决分类评分和掩盖质量之间的错位,从而使学习的表示形式更具歧视性。借助这些技术,我们的Uniinst,第一个基于FCN的盒子和无NMS实例分段框架,实现竞争性能,例如,使用Resnet-50-FPN和40.2 mask AP使用Resnet-101-FPN,使用Resnet-50-FPN和40.2 mask AP,使用Resnet-101-FPN,对抗AP可可测试-DEV的主流方法。此外,提出的实例感知方法对于遮挡场景是可靠的,在重锁定的ochuman基准上,通过杰出的掩码AP优于公共基线。我们的代码将在出版后提供。
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The way that information propagates in neural networks is of great importance. In this paper, we propose Path Aggregation Network (PANet) aiming at boosting information flow in proposal-based instance segmentation framework. Specifically, we enhance the entire feature hierarchy with accurate localization signals in lower layers by bottom-up path augmentation, which shortens the information path between lower layers and topmost feature. We present adaptive feature pooling, which links feature grid and all feature levels to make useful information in each feature level propagate directly to following proposal subnetworks. A complementary branch capturing different views for each proposal is created to further improve mask prediction.These improvements are simple to implement, with subtle extra computational overhead. Our PANet reaches the 1 st place in the COCO 2017 Challenge Instance Segmentation task and the 2 nd place in Object Detection task without large-batch training. It is also state-of-the-art on MVD and Cityscapes. Code is available at https://github. com/ShuLiu1993/PANet.
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自动核细胞分割和分类在数字病理学中起着至关重要的作用。但是,以前的作品主要基于具有有限的多样性和小尺寸的数据构建,使得在实际下游任务中的结果可疑或误导。在本文中,我们的目标是建立一种可靠且强大的方法,能够处理“临床野生”中的数据。具体地,我们研究和设计一种同时检测,分段和分类来自血红素和曙红(H&E)染色的组织病理学数据的新方法,并使用最近的最大数据集评估我们的方法:Pannuke。我们以新颖的语义关键点估计问题解决每个核的检测和分类,以确定每个核的中心点。接下来,使用动态实例分段获得核心点的相应类别 - 不可止液掩模。通过解耦两个同步具有挑战性的任务,我们的方法可以从类别感知的检测和类别不可知的细分中受益,从而导致显着的性能提升。我们展示了我们提出的核细胞分割和分类方法的卓越性能,跨越19种不同的组织类型,提供了新的基准结果。
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无需后续文本分割的准确布局分析仍然是一个持续的挑战,特别是在面对kangyur时,一种历史藏文档,具有相当大的触摸部件和斑驳的背景。旨在识别文档图像中的不同区域,对于诸如字符识别的后续程序,布局分析是必不可少的。然而,只有一点研究正在进行执行线路级布局分析,该分析未能处理Kangyur。为了获得最佳结果,提出了一种细粒度的子线级布局分析方法。首先,我们推出了一种加速方法来构建动态且可靠的数据集。其次,根据kangyur的特征对索洛夫2进行了增强。然后,我们在训练阶段将增强索入索维2馈出了准备的注释文件。一旦培训网络,可以在推断阶段分段和识别文本行,句子和标题的文本行和标题的实例。实验结果表明,该方法在我们的数据集中提供了一个体面的72.7%的平均精度。通常,这项初步研究提供了对细粒度的子线级布局分析的见解,并证明了基于索洛夫2的方法。我们还认为,所提出的方法可以在具有各种布局的其他语言文件上采用。
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Contour-based instance segmentation methods include one-stage and multi-stage schemes. These approaches achieve remarkable performance. However, they have to define plenty of points to segment precise masks, which leads to high complexity. We follow this issue and present a single-shot method, called \textbf{VeinMask}, for achieving competitive performance in low design complexity. Concretely, we observe that the leaf locates coarse margins via major veins and grows minor veins to refine twisty parts, which makes it possible to cover any objects accurately. Meanwhile, major and minor veins share the same growth mode, which avoids modeling them separately and ensures model simplicity. Considering the superiorities above, we propose VeinMask to formulate the instance segmentation problem as the simulation of the vein growth process and to predict the major and minor veins in polar coordinates. Besides, centroidness is introduced for instance segmentation tasks to help suppress low-quality instances. Furthermore, a surroundings cross-correlation sensitive (SCCS) module is designed to enhance the feature expression by utilizing the surroundings of each pixel. Additionally, a Residual IoU (R-IoU) loss is formulated to supervise the regression tasks of major and minor veins effectively. Experiments demonstrate that VeinMask performs much better than other contour-based methods in low design complexity. Particularly, our method outperforms existing one-stage contour-based methods on the COCO dataset with almost half the design complexity.
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从医用试剂染色图像中分割牙齿斑块为诊断和确定随访治疗计划提供了宝贵的信息。但是,准确的牙菌斑分割是一项具有挑战性的任务,需要识别牙齿和牙齿斑块受到语义腔区域的影响(即,在牙齿和牙齿斑块之间的边界区域中存在困惑的边界)以及实例形状的复杂变化,这些变化均未完全解决。现有方法。因此,我们提出了一个语义分解网络(SDNET),该网络介绍了两个单任务分支,以分别解决牙齿和牙齿斑块的分割,并设计了其他约束,以学习每个分支的特定类别特征,从而促进语义分解并改善该类别的特征牙齿分割的性能。具体而言,SDNET以分裂方式学习了两个单独的分割分支和牙齿的牙齿,以解除它们之间的纠缠关系。指定类别的每个分支都倾向于产生准确的分割。为了帮助这两个分支更好地关注特定类别的特征,进一步提出了两个约束模块:1)通过最大化不同类别表示之间的距离来学习判别特征表示,以了解判别特征表示形式,以减少减少负面影响关于特征提取的语义腔区域; 2)结构约束模块(SCM)通过监督边界感知的几何约束提供完整的结构信息,以提供各种形状的牙菌斑。此外,我们构建了一个大规模的开源染色牙菌斑分割数据集(SDPSEG),该数据集为牙齿和牙齿提供高质量的注释。 SDPSEG数据集的实验结果显示SDNET达到了最新的性能。
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从3D点云中识别3D零件实例对于3D结构和场景理解至关重要。几种基于学习的方法使用语义细分和实例中心预测作为培训任务,并且无法进一步利用形状语义和部分实例之间的固有关系。在本文中,我们提出了一种用于3D份实例分割的新方法。我们的方法将语义分割利用为融合非本地实例特征(例如中心预测),并以多种和跨层次的方式进一步增强了融合方案。我们还提出了一个语义区域中心预测任务,以训练和利用预测结果来改善实例点的聚类。我们的方法优于现有方法,在Partnet基准测试方面有大幅度的改进。我们还证明,我们的功能融合方案可以应用于其他现有方法,以提高其在室内场景实例细分任务中的性能。
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本文提出了一种用于对象和场景的高质量图像分割的新方法。灵感来自于形态学图像处理技术中的扩张和侵蚀操作,像素级图像分割问题被视为挤压对象边界。从这个角度来看,提出了一种新颖且有效的\ textBF {边界挤压}模块。该模块用于从内侧和外侧方向挤压对象边界,这有助于精确掩模表示。提出了双向基于流的翘曲过程来产生这种挤压特征表示,并且设计了两个特定的损耗信号以监控挤压过程。边界挤压模块可以通过构建一些现有方法构建作为即插即用模块,可以轻松应用于实例和语义分段任务。此外,所提出的模块是重量的,因此具有实际使用的潜力。实验结果表明,我们简单但有效的设计可以在几个不同的数据集中产生高质量的结果。此外,边界上的其他几个指标用于证明我们对以前的工作中的方法的有效性。我们的方法对实例和语义分割的具有利于Coco和CityCapes数据集来产生重大改进,并且在相同的设置下以前的最先进的速度优于先前的最先进的速度。代码和模型将在\ url {https:/github.com/lxtgh/bsseg}发布。
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我们介绍了一种名为RobustAbnet的新表检测和结构识别方法,以检测表的边界并从异质文档图像中重建每个表的细胞结构。为了进行表检测,我们建议将Cornernet用作新的区域建议网络来生成更高质量的表建议,以更快的R-CNN,这显着提高了更快的R-CNN的定位准确性以进行表检测。因此,我们的表检测方法仅使用轻巧的RESNET-18骨干网络,在三个公共表检测基准(即CTDAR TRACKA,PUBLAYNET和IIIT-AR-13K)上实现最新性能。此外,我们提出了一种新的基于分裂和合并的表结构识别方法,其中提出了一个新型的基于CNN的新空间CNN分离线预测模块将每个检测到的表分为单元格,并且基于网格CNN的CNN合并模块是应用用于恢复生成细胞。由于空间CNN模块可以有效地在整个表图像上传播上下文信息,因此我们的表结构识别器可以坚固地识别具有较大的空白空间和几何扭曲(甚至弯曲)表的表。得益于这两种技术,我们的表结构识别方法在包括SCITSR,PubTabnet和CTDAR TrackB2-Modern在内的三个公共基准上实现了最先进的性能。此外,我们进一步证明了我们方法在识别具有复杂结构,大空间以及几何扭曲甚至弯曲形状的表上的表格上的优势。
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