What data must be input into the software to realize empty three-dimensional calculation?

Input UAV image, camera parameters (internal orientation elements) and pos data (high-precision external orientation elements) to obtain image points (image coordinate system).

According to the principle of three-dimensional calculation, data are needed in the calculation process: input UAV image, camera parameters (internal orientation elements), pos data (high-precision external orientation elements), and acquisition of image points (image coordinate system). Space three partition must take an appropriate number of images according to the processing capacity of space three software to form an encrypted area.

Space three refers to the process of calculating the camera position and attitude at the moment of camera imaging and the sparse point cloud of the target by using the spatial geometric relationship between the image and the target and the corresponding relationship between the image point and the object in photogrammetry.