Interactive plotting method based on laser-point cloud and panorama image

Abstract

The invention discloses an interactive plotting method based on laser-point cloud and a panorama image. The method includes the steps of forward interactive plotting or/and reverse interactive plotting, wherein in the forward interactive plotting step, pixel coordinates of the panorama image are positioned to laser-point coordinates; in the reverse interactive plotting step, the laser-point coordinates are positioned to the pixel coordinates of the panorama image. During forward interaction, a plotting object is determined in the panorama image, and the characteristics of being visual, clear and definite are achieved. During reverse interaction, a specific laser point is obtained through interaction by means of the buffering method, coordinate conversion parameters are converted into spatial rectangular coordinates, the pixel coordinates of the panorama image are calculated by means of spatial calibration parameters, panorama point GPS coordinates and spatial posture information, and accordingly a direction corresponding to the laser point is displayed in the panorama image.

Description

technical field [0001] The invention belongs to surveying and mapping technology. Background technique [0002] The use of laser point cloud for surveying and mapping can greatly reduce the amount of field work, and has a wide range and high precision, so its application is becoming more and more extensive. However, the current laser point cloud mapping has some obvious problems: the degree of intuition is low, and it takes a certain amount of time to find and confirm the target, especially when the point cloud is incomplete, it requires a certain amount of experience to confirm. At the same time, due to the randomness of the target during mapping, it is easy to cause the omission of mapping elements. This is difficult to meet the needs of mapping and construction, and also restricts the application of laser point cloud in the field of mapping. [0003] The mobile measurement system can quickly acquire laser point clouds and panoramic images. The panoramic images are intui...

AI Technical Summary

Problems solved by technology

However, the current laser point cloud mapping has some obvious problems: the degree of intuition is low, and it takes a certain amount of time to find and confirm the target, especially when the point cloud is incomplete, it requires a certain amount of experience to confirm

Although there are some applications for surveying and mapping based on panoramic images alone, due to the lack of comprehensive use of spatial calibration parameters and spatial attitude information (IMU), the accuracy of the mapping is low, which cannot meet the accuracy requirements of large-scale mapping, and can only be used for Coarse positioning

Some use multiple panoramic images to confirm a collection point, which leads to high operational complexity, and does not use the characteristics of high-precision mapping of laser point cloud, which affects the efficiency and accuracy of mapping

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