A major emerging challenge is how to protect people's privacy as cameras and
computer vision are increasingly integrated into our daily lives, including in
smart devices inside homes. A potential solution is to capture and record just
the minimum amount of information needed to perform a task of interest. In this
paper, we propose a fully-coupled two-stream spatiotemporal architecture for
reliable human action recognition on extremely low resolution (e.g., 12x16
pixel) videos. We provide an efficient method to extract spatial and temporal
features and to aggregate them into a robust feature representation for an
entire action video sequence. We also consider how to incorporate high
resolution videos during training in order to build better low resolution
action recognition models. We evaluate on two publicly-available datasets,
showing significant improvements over the state-of-the-art.

本文提出了一种全耦合的两路时空结构体系框架，可在极低分辨率（如 12x16 像素）视频中可靠地识别人的动作，以保护人们的隐私，同时在训练期间考虑高分辨率视频以建立更好的低分辨率模型，取得了明显的改进。

极低分辨率动作识别的全耦合双流时空网络

Fully-Coupled Two-Stream Spatiotemporal Networks for Extremely Low  Resolution Action Recognition

We present an efficient method for detecting anomalies in videos. Recent
applications of convolutional neural networks have shown promises of
convolutional layers for object detection and recognition, especially in
images. However, convolutional neural networks are supervised and require
labels as learning signals. We propose a spatiotemporal architecture for
anomaly detection in videos including crowded scenes. Our architecture includes
two main components, one for spatial feature representation, and one for
learning the temporal evolution of the spatial features. Experimental results
on Avenue, Subway and UCSD benchmarks confirm that the detection accuracy of
our method is comparable to state-of-the-art methods at a considerable speed of
up to 140 fps.

我们提出了一种有效的方法来检测视频中的异常，该方法利用卷积神经网络的卷积层进行物体识别和识别，其中包括两个主要组件，一个用于空间特征表示，以及一个用于学习空间特征的时间演变。实验结果表明，我们的方法的检测准确性与最先进的方法相当，速度高达 140 帧 / 秒。