The invention relates to a high-precision stereoscopic spectral imaging detection device and a method with combination of vision field matching, active detection and passive detection. The high-precision stereoscopic spectral imaging detection device comprises a front mirror group, a light path folding and beam splitting assembly, a three-line array stereoscopic imaging spectrometer assembly and a full-waveform laser radar assembly. Vision fields of full-waveform laser radar and three-line array stereoscopic spectral imagers are matched with one another. The high-precision stereoscopic special imaging detection device and the method have the advantages that three-line array stereoscopic imaging spectrometers and carrying platforms are combined with one another to carry out one-dimensional push-broom movement, and accordingly high-precision two-dimensional image information, high-precision spectral information and low-precision elevation information of observation targets can be acquired; high-precision elevation information and low-precision spatial resolution can be synchronously acquired by the full-waveform laser radar; elevation information of the ground pixels of the same vision fields can be calibrated by the aid of the high-precision elevation information of the full-waveform laser radar, and accordingly high-precision three-dimensional spatial information and high-precision spectral information can be ultimately acquired.

Active and passive stereoscopic spectral imaging device with high-precision vision field matching function and detection method

The invention discloses a method and a device used for measuring the angular resolution of a multiline laser radar. One specific implementation way of the method comprises the following steps that: when a situation that the multiline laser radar scans a checkerboard calibration board is obtained, adopting a camera to shoot the picture of the checkerboard calibration board; identifying a checkerboard in the picture, and according to the shape and length information of each checkerboard in the checkerboard calibration board, determining physical length represented by the unit pixel of the picture; determining a center light spot and light spot pairs in the picture; according to the physical length represented by the unit pixel and the determined center light spot and light spot pairs, determining an included angle between a laser beam corresponding to each light spot in the light spot pairs and the laser beam corresponding to the center light spot; and according to the determined included angle between the laser beam corresponding to each light spot in the light spot pairs and the laser beam corresponding to the center light spot, determining the angular resolution of the multiline laser radar. By use of the implementation way, the angular resolution of the multiline laser radar is measured at low cost, and the reliability of angular resolution parameters is improved.

Method and device used for measuring angular resolution of multiline laser radar

The present disclosure discloses a method and apparatus for measuring an angular resolution of a multi-beam lidar. The method comprises: acquiring, when a checkerboard calibration plate is scanned by a multi-beam lidar, an image of the checkerboard calibration plate photographed by a camera; identifying a checkerboard in the image, and determining a physical length characterized by a unit pixel of the image based on shape and length information of each checker in the checkerboard calibration plate; determining a center light spot and a light spot pair in the image; determining an angle between a laser beam corresponding to each light spot of the light spot pair and a laser beam corresponding to the center light spot based on the physical length characterized by the unit pixel, the center light spot and the light spot pair; and determining the angular resolution of the multi-beam lidar based on the determined angle.

Method and apparatus for measuring angular resolution of multi-beam lidar

The invention discloses an on-orbit joint calibration method for a multi-beam satellite-borne laser altimeter. According to the method, a relative geometrical relationship between a reference beam andother beams is constructed by setting a reference beam, so that a multi-beam laser combined geometric calibration model is established. The method comprises the steps of setting a reference beam of the multi-beam satellite-borne laser altimeter, and constructing an on-orbit combined geometrical calibration model of the multi-beam satellite-borne laser altimeter; combining the geometric calibration models of the multi-beam satellite-borne laser altimeter, and resolving a geometric calibration error equation of the multi-beam satellite-borne laser altimeter; and performing laser pointing and ranging settlement on each beam of the multi-beam satellite-borne laser altimeter. The technical scheme of the invention aims to solve the problem of on-orbit calibration of the multi-beam satellite-borne laser altimeter, and provides a reliable on-orbit calibration method for the multi-beam satellite-borne laser altimeter which is already on orbit and is about to be launched at present.

On-orbit joint calibration method for multi-beam satellite-borne laser altimeter

The invention relates to a two-wave-band rendezvous active illumination distance gating imaging system and an imaging method. The problems that an existing imaging system is insufficient in detectiondistance, distance resolution and ranging accuracy, and the target characteristic of full-spectral laser response is difficult to obtain are solved. The two-wave-band rendezvous active illumination distance gating imaging system comprises a first theodolite unit, a second theodolite unit, a first laser, a second laser and a ground interaction management system; the first theodolite unit comprisesa first detector and a first theodolite; the first theodolit carries the first laser and the first detector, the second theodolite unit comprises a second detector and a second theodolite, and the second theodolite carries the second laser and the second detector; the wavelength of the first laser is different from the wavelength of the second laser, the first detector receives diffuse reflectionlight formed in the mode that the second laser irradiates a target, and the second detector receives diffuse reflection light formed in the mode that the first laser irradiates the target; and the first theodolite unit and the second theodolite unit are in communication through the ground interaction management system.

Two-wave-band rendezvous active illumination distance gating imaging system and imaging method

The utility model relates to a main passive stereo spectral imaging device that match high accuracy visual field. The device includes a pre -set lens group, the light path is turned back and beam splitting subassembly, three linear array stereo imaging spectrometer component and all -wave shape laser radar subassembly, and mate the visual field of all -wave shape laser radar and three linear array stereo imaging spectrum appearance. Utilize three linear array stereo imaging spectrum appearance to combine lift -launch platform one -dimensional to push away and sweep the motion, can obtain the elevation information of observable target's high accuracy two -dimensional image information, high accuracy spectral information and lower precision, all -wave shape laser radar can synchronization obtaining high accuracy elevation information and low precision spatial resolution. Utilize the high accuracy elevation information of all -wave shape laser radar subassembly to go on maring the elevation information of same visual field ground pixel, finally can obtain the three dimensions information of high accuracy and the spectral information of high accuracy.

Main passive stereo spectral imaging device that match high accuracy visual field

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Active and passive stereoscopic spectral imaging device with high-precision vision field matching function and detection method

Main passive stereo spectral imaging device that match high accuracy visual field