多波段成像传感器校准

发布时间：2018-05-24 14:34

本文选题：多谱段 + 成像器件　；参考：《南京大学》2017年硕士论文

【摘要】：传统的可见光相机在成像过程中只记录了(R,G,B)三个颜色通道的分量,对于人眼来说这是足够的,但是这远不能精确表示光线在各个波长分量上的响应,而且容易受环境光的影响,安全监控、医疗诊断等诸多领域都很受限制,非可见光波段成像器件以及光谱成像器件可以记录(R,G,B)以外的谱段信息,可以弥补普通可见光相机的缺陷,但是目前的相机在成像过程中的投影变换使得所得照片失去了深度(z)信息,这使得利用单相机进行定位、诊断等工作也需要特殊的校准等工作才能进行;利用多光谱成像器件进行军事安全、环境监测、生物科学方面的工作也需要进行精准的校准工作。本文围绕如何对各波段成像传感器以及高光谱成像器进行准确校准展开研究,主要工作和创新点包括以下几个方面:1.提出了一种对日盲紫外成像器件进行校准并进行定位的方法,与常用方法相比,能够克服日盲紫外成像器件因分辨率以及色彩信息缺乏而导致的问题,能够在参考点丢失的情况下进行补,使系统更为鲁棒,实现了日盲紫外器件高精度校准与定位。2.提出了一种利用双目红外成像器件进行高精度定位反光医学小球的方法,针对具体的应用场景,能够更准确地计算成像小球的空间坐标,使得定位更加准确,实现了红外器件高精度全自动化校准与定位。3.提出了一种针对棱镜-掩膜式多光谱采集相机的校准方式,与常用方法相比,能够准确进行双相机配准,提高光谱分辨率和和整个稳定性,对于光谱数据的准确性提高有显著的作用。
[Abstract]:Traditional visible-light cameras only record the components of the three color channels in the imaging process, which is sufficient for the human eye, but it is far from accurate enough to represent the response of the light to each wavelength component, and is vulnerable to the influence of ambient light. Security monitoring, medical diagnostics and many other areas are very restricted. Non-visible light band imaging devices and spectral imaging devices can record spectrum information other than the RPG-Bs, and can make up for the defects of ordinary visible light cameras. However, the current projection transformation of the camera in the imaging process results in the loss of the depth of the image information, which makes the use of a single camera for positioning, diagnosis and other work also needs special calibration work. The use of multispectral imaging devices for military security, environmental monitoring, and biological science also requires accurate calibration. This paper focuses on the accurate calibration of imaging sensors and hyperspectral imagers in each band. The main work and innovations include the following aspects: 1. A method for calibrating and locating solar blind ultraviolet imaging devices is proposed. Compared with common methods, it can overcome the problems caused by the lack of resolution and color information of solar blind ultraviolet imaging devices. It can make the system more robust when the reference point is lost, and realize the high-precision calibration and positioning of sunblind ultraviolet devices. In this paper, a method of high-precision positioning of reflective medical pellets with binocular infrared imaging devices is proposed. In view of the specific application scenarios, the spatial coordinates of imaging spheres can be calculated more accurately, and the positioning is more accurate. The high precision automatic calibration and positioning of infrared devices is realized. A calibration method for prism-mask multispectral acquisition camera is proposed. Compared with common methods, it can accurately register double cameras, improve spectral resolution and overall stability. It plays an important role in improving the accuracy of spectral data.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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