Method and apparatus to calculate target position using imaging spectrometer

Abstract

The embodiments of the invention disclose a method and apparatus to calculate target position using an imaging spectrometer. The method comprises the following steps: calculating the corresponding light spot imaging positions through target images acquired by the imaging spectrometer within the preset various integration times; then calculating the weighted average number of the plurality of light spot imaging position values; and using the weighted average number as the final position value of the light spot imaging. According to the technical schemes of the invention, the weighted average number of the light spot imaging positions of a plurality of target images is used as the final target position, which effectively avoids the calculation errors caused from the fluctuation of the light spot positions, ensures the calculation precision of the target position, increases the positioning accuracy at some extent, raises the system precision of an imaging spectrometer and further increases the measurement accuracy of the imaging spectrometer. In addition, the embodiments of the invention also provide an apparatus to implement the method and so to make the method more practical and correspond to the apparatus.

Description

technical field [0001] The invention relates to the technical field of imaging spectrometer applications, in particular to a method and a device for calculating a target position by an imaging spectrometer. Background technique [0002] The traditional imaging system can only obtain the spatial image information of the target scene. The traditional spectrometer determines the material properties by obtaining the spectral information of the radiation intensity curve that changes with the wavelength, thereby obtaining the target spectral information. Imaging spectroscopy technology combines optical imaging technology with spectral detection technology to form a new remote sensing technology, which solves the problems of traditional optical imagers with images but no spectra and traditional spectrometers with spectra without images. [0003] Imaging spectrometer, also known as high spectral resolution remote sensing, its optical system consists of a front telephoto system and a...

AI Technical Summary

Problems solved by technology

It can be seen from the table on the right that the effective spectra are very close to each other. If the error in the x direction is greater than 0.5 pixels (these errors are mainly the calculation of the target accuracy error during calibration, the correction error at the position of the non-calibration point, and the image caused by temperature drift Surface position drift error, position changes between components cause image plane position deviation and real-time reading target position calculation accuracy error), the measurement result of the imaging spectrometer will be wrong; if the error in the y direction is greater than 0.5 pixels, the accuracy of the measurement result will be reduced. double

It can be seen that the accuracy of the target position greatly affects the measurement accuracy of the imaging spectrometer

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