Close-range photogrammetry color 3D scanning lidar

Abstract

A close-range photogrammetry colorful three-dimensional scanning laser radar comprises colorful laser light sources, a transmission optical system, a scanning system, a receiving optical system, a laser spectrum detection and distance-measuring circuit, a data collection and time sequence controller and a computer data processing unit. The colorful laser light sources comprise a red light pulse laser light source, a green or yellow light pulse laser light source, a blue light pulse laser light source and an infrared pulse laser light source, lasers emitted by the colorful laser light sources are synthesized into a laser beam through the transmission optical system, and are incident to the scanning system, colorful laser three-dimensional linear scanning is performed on a target ground object through the scanning system, echo signals formed by scanning are captured by the optical receiving system, intensity of pulse lasers obtained by detection of the laser spectrum detection and distance-measuring circuit and distance information of the target ground object are transmitted to a data collecting and time sequence controller for multi-channel data collection and time sequence calculation, and the result is output to the computer data processing unit.

Description

Technical field [0001] The invention relates to the technical field of surveying, mapping and remote sensing, in particular to a close-range photogrammetry color three-dimensional scanning laser radar. Background technique [0002] Ground-based close-range photogrammetry lidar technology usually detects in a single-wavelength manner, and realizes laser three-dimensional scanning imaging detection by rotating the rotating mirror and the base. However, due to the limitation of a single laser wavelength, only the intensity value of a single wavelength can be obtained, and the most intuitive color information for people is lacking. There are obvious deficiencies in feature recognition and later data processing. Summary of the invention [0003] The purpose of the present invention is to provide a close-range photogrammetric color lidar technology. Based on the existing single infrared laser light source of ground-based lidar, this technology has been developed to include colored lase...

AI Technical Summary

Problems solved by technology

However, due to the limitation of a single laser wavelength, only the intensity value of a single wavelength can be obtained, which lacks the most intuitive color information for people, and has obvious deficiencies in object recognition and later data processing.

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