results: 这个研究表明了 OpEnCam 设计可以对抗多种攻击，并且仍然保持现有镜头less摄像机的实时摄像机能力。实验和实际应用显示 OpEnCam 能够实现隐私保护。Abstract
Lensless cameras multiplex the incoming light before it is recorded by the sensor. This ability to multiplex the incoming light has led to the development of ultra-thin, high-speed, and single-shot 3D imagers. Recently, there have been various attempts at demonstrating another useful aspect of lensless cameras - their ability to preserve the privacy of a scene by capturing encrypted measurements. However, existing lensless camera designs suffer numerous inherent privacy vulnerabilities. To demonstrate this, we develop the first comprehensive attack model for encryption cameras, and propose OpEnCam -- a novel lensless OPtical ENcryption CAmera design that overcomes these vulnerabilities. OpEnCam encrypts the incoming light before capturing it using the modulating ability of optical masks. Recovery of the original scene from an OpEnCam measurement is possible only if one has access to the camera's encryption key, defined by the unique optical elements of each camera. Our OpEnCam design introduces two major improvements over existing lensless camera designs - (a) the use of two co-axially located optical masks, one stuck to the sensor and the other a few millimeters above the sensor and (b) the design of mask patterns, which are derived heuristically from signal processing ideas. We show, through experiments, that OpEnCam is robust against a range of attack types while still maintaining the imaging capabilities of existing lensless cameras. We validate the efficacy of OpEnCam using simulated and real data. Finally, we built and tested a prototype in the lab for proof-of-concept.
摘要
无镜头相机多路复用进来的光 перед记录器。这种能力使得 ultra-thin、高速和单枪3D成像技术得到发展。最近，有很多尝试表明了无镜头相机的另一个有用特点——保护场景的隐私。然而，现有的无镜头相机设计具有许多内置的隐私漏洞。为了 demonstarate 这点，我们开发了首个全面攻击模型 для encryption 相机，并提议 OpEnCam ——一种新的无镜头 OPtical ENcryption CAmera 设计，超越了这些漏洞。OpEnCam 使用模拟能力来加密进来的光，然后记录它。只有通过获得相机的加密密钥来恢复原始场景。我们的 OpEnCam 设计有两个主要改进：1. 使用两个垂直分布的光面，一个附加在探测器上，另一个在探测器上方几毫米处。2. 使用基于信号处理的面积模式。我们通过实验表明，OpEnCam 对多种攻击类型具有强大的鲁棒性，同时仍保持现有无镜头相机的成像能力。我们验证了 OpEnCam 的有效性使用实验和真实数据。最后，我们在实验室中建立了一个原型，以证明概念的可行性。