AN INFRARED STROBE CCD TELEVISION CAMERA UNIT

红外频闪CCD电视摄像机装置

• 批准号: 3896235
• 负责人: H E CASCIO
• 金额: --
• 依托单位: NATIONAL CENTER FOR RESEARCH RESOURCES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3896235
• 关键词: biomedical equipment development; biomedical equipment resource; chordate locomotion; image processing; infrared radiation; television; video recording system

The Biomechanics Laboratory makes available to clinicians and researchers at the NIH quantitative information concerning human motion. The Laboratory has a computer-operated television motion analysis system (VICON) to acquire and evaluate data. The system detects the presence of reflective markers located on the patient and calculates the three dimensional location of each marker. The problems with persistence, blooming, and electronic stability of the vidicon cameras makes the balancing and calibration of the six cameras difficult. Also, problems with video overload are encountered when a strobed infrared (IR) Light Emitting Diode (LED) array is viewed by another camera. The solution is to replace the vidicon cameras with CCD cameras, which have superior electronic stability and do not display-picture smearing when detecting fast motion. Each camera has a strobed IR array to illuminate the field of view. To eliminate the illumination cross-talk between cameras, each IR array is equipped with IR emitters with wavelengths of either 880nm or 950nm. An IR band-pass filter that matches the wavelength of the array is placed over the camera lens.

生物力学实验室为临床医生和研究人员提供 美国国立卫生研究院提供有关人体运动的定量信息。这个 实验室有一个计算机操作的电视运动分析系统 (VICON)来获取和评估数据。系统检测到是否存在 位于患者身上的反射标记并计算出三个 每个标记的维度位置。持之以恒的问题是， 开花，以及摄像机的电子稳定性使 六个摄像头的平衡和校准很困难。此外，还有一些问题 当频闪红外(IR)灯出现时，会遇到视频过载 另一台摄像机可以查看发光二极管(LED)阵列。 解决方案是用CCD摄像机取代摄像机，这是 具有卓越的电子稳定性，不会出现画面污点 当检测到快速运动时。每个摄像头都有一个频闪红外阵列，以 照亮视野。消除照明串扰 在摄像机之间，每个红外阵列都配备了红外发射器， 波长为880 nm或950 nm。匹配的红外带通滤光片 阵列的波长被放置在相机镜头上。