Poór Viktor Soma
Department of Forensic Medicine, Medical School, University of Pécs, Szigeti Street 12, Pécs, Hungary.
HardwareX. 2023 May 30;14:e00438. doi: 10.1016/j.ohx.2023.e00438. eCollection 2023 Jun.
Photogrammetry is a 3D reconstruction technique using photographs of the target from multiple angles. Taking pictures around a static object with a single camera can yield high-quality models, but if the subject moves between images, 3D reconstruction might fail. One way to mitigate this is to use multiple cameras. This project aimed to develop a tool for fast and precise wound documentation for clinical forensic medicine. This paper describes a simple, low-cost modular system, where smartphones of different manufacturers are used as networked cameras. Exposure is initiated at the same time in all the phones with a simple circuit emulating a headset button press. A proof-of-concept device was built, where four phones (Huawei nova 8i (2 pcs), Samsung Galaxy S7 Edge, Oukitel K4000 Pro) were attached to a curved, 3D-printed, handheld frame. The average delay of image capture was 636 ms between the quickest and the slowest phones. When compared to the single-camera approach, the use of different cameras did not reduce the quality of the 3D model. The phone cam array was less susceptible to movement artefacts caused by breathing. Wound assessment was possible based on the 3D models created with this device.
摄影测量法是一种利用从多个角度拍摄目标物体的照片进行三维重建的技术。使用单台相机围绕静态物体拍照可以生成高质量模型，但如果物体在拍摄图像之间移动，三维重建可能会失败。减轻这种情况的一种方法是使用多台相机。该项目旨在开发一种用于临床法医学快速精确伤口记录的工具。本文描述了一个简单、低成本的模块化系统，其中不同制造商的智能手机被用作联网相机。通过一个模拟耳机按钮按下的简单电路，所有手机同时启动曝光。构建了一个概念验证设备，将四部手机（华为nova 8i（2部）、三星Galaxy S7 Edge、欧奇K4000 Pro）连接到一个弯曲的、3D打印的手持框架上。最快和最慢的手机之间图像捕捉的平均延迟为636毫秒。与单相机方法相比，使用不同相机并没有降低三维模型的质量。手机摄像头阵列对呼吸引起的运动伪影不太敏感。基于用该设备创建的三维模型可以进行伤口评估。
