Patent ID: 11972507
Assignee: NANJING POLAGIS TECHNOLOGY CO. LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An orthophoto map generation method based on panoramic map, wherein the method comprises the following steps:
step 1: generating point cloud data in a panoramic map range according to a panoramic map, field depth data and camera parameters;
the camera parameters including longitude and latitude coordinates, pitch angle and azimuth angle of a photographing device during photographing;
step 2: generating point cloud data corresponding to all panoramic maps in a target area according to the method at step 1; and
step 3: projecting the point cloud data obtained at step 2 onto a plane to generate an orthophoto map with a specified resolution, projection information and geographic coordinate information;
wherein at step 1, the point cloud data generation step comprises:
overlapping a pixel value corresponding to a pixel of each row or column number in the panoramic map and depth data corresponding to a pixel of the corresponding row or column number in the field depth data to obtain a panoramic map containing the field depth data; and
in conjunction with coordinates, an azimuth angle and a pitch angle of a photographing device during photographing, calculating real geographic position data of an object represented by each pixel in the panoramic map containing the field depth data, and obtaining point cloud data containing the pixel value of each pixel and the real geographic position data of the object represented by each pixel.