基于DLT方法的非量测数码相机检校研究

普通数码相机在图像获取方面有着很多优势，但它是非量测化相机，不能用普通数字摄影测量方法对其数字图像进行处理。针对这一情况，本文提出了建立3维控制场对非量测数码相机进行检校，采用DLT（直接线性变换）方法计算出非量测数码相机的内外方位元素，实现非量测数码相机获取像对的可量测化。最后通过在黑龙江省地理信息产业园主楼区域建立3维控制场的试验，进行数据采集后获取了实际的3维模型。

Study on Non-Metric Digital Camera Calibration Based on DLT Method

Common digital camera has many advantages in the aspect of image acquisition. But it is non-metric digital camera, so we cannot process the digital image using traditional photogrammetric method. Aiming at this condition, this paper put forward the method of construction 3D control field to calibrate non-metric digital camera, then calculating the interior and exterior orientation elements of non-metric digital camera using DLT （Direct Linear Transformation） method, and realizing the measurability of the image acquired by non-metric digital camera. Finally, it constructed the 3D control field at the main building area of Heilongjiang Geomatics Industrial Park, collected the data, and acquired the practical 3D model.