CT-ER: Privacy Algorithms for Human Imaging Systems

快速增长的三维全息成像系统的需求引起了许多学科的浓厚兴趣。然而，这些扫描的图像揭示了人体的细节，并引发了隐私问题。在这个项目中，该团队开发了：1)用于隐私感知成像的虚拟试验台。与医学研究中广泛使用的“模特儿”类似，该团队打算开发一种与设备无关的测试数据库，可以为更广泛的研究社区模拟3D人体扫描仪的输出。2)该团队开发了用于分割人体和检测私人身体部位的健壮而快速的算法。许多机器学习算法依赖于坐标，并且受到训练数据空间的限制。现有的算法只能在不能保证可接受性能的小边界框内工作。在这个项目中，团队使用创新的Analogia Graph和相对模板匹配算法来提高速度和精度。3)该团队开发了使用曲率测量和空间密度过滤模型检测人体上异常对象的算法。最后，该团队开发了一种基于检测精度、隐私和美学测量来评估视觉隐私算法的方法。预期的结果将对机场和其他大型基础设施中的隐私感知安全产生更广泛的影响。它可以使根据个人3D扫描数据设计的定制产品受益。它可以用于数字考古中的古代文物重建。此外，它还可以应用于医疗诊断，如虚拟结肠镜检查。最后，该项目将有益于以人为本的多学科教育。

The rapidly growing demand of 3D holographic imaging systems has created a significant interest in many disciplines. However, these scanned images reveal human body details and raise privacy concerns. In this project, the team develops: 1) a virtual test bed for privacy-aware imaging. Similar to the "phantoms" widely used in medical studies, the team intends to develop a device-independent test database that can simulate the output of a 3D human body scanner for a broader research community. 2) The team develops robust and fast algorithms for segmenting human bodies and detecting private body parts. Many machine learning algorithms are coordinate-dependent and limited by the training data space. Existing algorithms only work within small bounding boxes that do not warrant an acceptable performance. In this project, the team uses innovative Analogia Graph and Relative Template Matching algorithms for speed and accuracy. 3) The team develops the algorithm for detecting anomalous objects on human body using curvature measurement and spatial density filtering models. Finally, 4) the team develops a method for assessing the visual privacy algorithms based on detection accuracy, privacy and aesthetic measurements. The anticipated results will have broader impacts on privacy-aware security in airports and other large infrastructures. It can benefit custom-fit products that are designed from personal 3D scanning data. It can be used in reconstruction of ancient artifacts in digital archeology. In addition, it can be applied to medical diagnoses, such as virtual colonoscopy. Finally, this project can benefit multidisciplinary education of human-centric systems.