现代的高性能语义分割方法采用沉重的主链和扩张的卷积来提取相关特征。尽管使用上下文和语义信息提取功能对于分割任务至关重要，但它为实时应用程序带来了内存足迹和高计算成本。本文提出了一种新模型，以实现实时道路场景语义细分的准确性/速度之间的权衡。具体来说，我们提出了一个名为“比例吸引的条带引导特征金字塔网络”（s \ textsuperscript {2} -fpn）的轻巧模型。我们的网络由三个主要模块组成：注意金字塔融合（APF）模块，比例吸引条带注意模块（SSAM）和全局特征Upsample（GFU）模块。 APF采用了注意力机制来学习判别性多尺度特征，并有助于缩小不同级别之间的语义差距。 APF使用量表感知的关注来用垂直剥离操作编码全局上下文，并建模长期依赖性，这有助于将像素与类似的语义标签相关联。此外，APF还采用频道重新加权块（CRB）来强调频道功能。最后，S \ TextSuperScript {2} -fpn的解码器然后采用GFU，该GFU用于融合APF和编码器的功能。已经对两个具有挑战性的语义分割基准进行了广泛的实验，这表明我们的方法通过不同的模型设置实现了更好的准确性/速度权衡。提出的模型已在CityScapes Dataset上实现了76.2 \％miou/87.3fps，77.4 \％miou/67fps和77.8 \％miou/30.5fps，以及69.6 \％miou，71.0 miou，71.0 \％miou，和74.2 \％\％\％\％\％\％。 miou在Camvid数据集上。这项工作的代码将在\ url {https://github.com/mohamedac29/s2-fpn提供。

The number of international benchmarking competitions is steadily increasing in various fields of machine learning (ML) research and practice. So far, however, little is known about the common practice as well as bottlenecks faced by the community in tackling the research questions posed. To shed light on the status quo of algorithm development in the specific field of biomedical imaging analysis, we designed an international survey that was issued to all participants of challenges conducted in conjunction with the IEEE ISBI 2021 and MICCAI 2021 conferences (80 competitions in total). The survey covered participants' expertise and working environments, their chosen strategies, as well as algorithm characteristics. A median of 72% challenge participants took part in the survey. According to our results, knowledge exchange was the primary incentive (70%) for participation, while the reception of prize money played only a minor role (16%). While a median of 80 working hours was spent on method development, a large portion of participants stated that they did not have enough time for method development (32%). 25% perceived the infrastructure to be a bottleneck. Overall, 94% of all solutions were deep learning-based. Of these, 84% were based on standard architectures. 43% of the respondents reported that the data samples (e.g., images) were too large to be processed at once. This was most commonly addressed by patch-based training (69%), downsampling (37%), and solving 3D analysis tasks as a series of 2D tasks. K-fold cross-validation on the training set was performed by only 37% of the participants and only 50% of the participants performed ensembling based on multiple identical models (61%) or heterogeneous models (39%). 48% of the respondents applied postprocessing steps.

心肌活力的评估对于患有心肌梗塞的患者的诊断和治疗管理是必不可少的，并且心肌病理学的分类是本评估的关键。这项工作定义了医学图像分析的新任务，即进行心肌病理分割（MYOPS）结合三个序列的心脏磁共振（CMR）图像，该图像首次与Mycai 2020一起在Myops挑战中提出的。挑战提供了45个配对和预对准的CMR图像，允许算法将互补信息与三个CMR序列组合到病理分割。在本文中，我们提供了挑战的详细信息，从十五个参与者的作品调查，并根据五个方面解释他们的方法，即预处理，数据增强，学习策略，模型架构和后处理。此外，我们对不同因素的结果分析了结果，以检查关键障碍和探索解决方案的潜力，以及为未来的研究提供基准。我们得出结论，虽然报告了有前途的结果，但研究仍处于早期阶段，在成功应用于诊所之前需要更深入的探索。请注意，MyOPS数据和评估工具继续通过其主页（www.sdspeople.fudan.edu.cn/zhuangxiahai/0/myops20 /）注册注册。