项目名称: 光场相机摄影测量模型及方法研究
项目编号: No.41471388
项目类型: 面上项目
立项/批准年度: 2015
项目学科: 天文学、地球科学
项目作者: 刘召芹
作者单位: 中国科学院遥感与数字地球研究所
项目金额: 80万元
中文摘要: 先拍照后对焦的4D光场相机作为新一代摄影传感器,完整获取的4D光场不仅记录目标物体的光强度,而且包含来自目标物多个射线的方向和强度。通过后期数据处理实现不同景深目标在一张照片上的清晰成像,获得比传统相机更多的三维场景几何信息和辐射信息,克服了传统摄影测量相机无法同时获取不同景深目标清晰成像、在运动摄影中容易存在影像模糊的不足。不同于传统相机的光场成像模型导致既有摄影测量模型与方法无法直接应用于光场相机。本项目旨在研究光场相机在摄影测量中的测量模型与方法,包括高精度的光场相机标定模型与方法、物方像方的共线方程模型、前方交会和后方交会方法、区域网平差模型与方法等,建立光场相机摄影测量基础理论和应用模型关键问题,并利用移动测量和航空摄影测量平台对所建立的模型、方法及精度进行实验验证,评价光场相机应用于摄影测量的适用性。
中文关键词: 相机检校;几何成像模型;区域网平差
英文摘要: As an imaging device which shoots pictures that can be focused after they're captured, either on the camera itself or online, a light-field camera captures both light intensity of target object and the directions and intensity of every incoming ray. After data post-processing, every optical aspect of the scene can be generated, moreover, it can much geometric and radiation information of 3D scene. Being different from traditional photogrammetric camera, such light field information can be used to derive clear targets at various depths and capture motion targets, so that photogrammetry model and method cannot be applied to the light field camera directly. This project proposes photogrammetric model and methods for light field camera, which include high accuracy calibration for light field camera, collinearity equation in object and image space, forward intersection and space resection, and bundle adjustment model and method. After developing basic light field photogrammetry theory and model for application, accuracy evaluation of the proposed model using Mobile Mapping System and low-altitude aerial photography data is performed, ground control data will be used for validation.
英文关键词: Camera calibration;geometrical imaging model;block adjustment