Hyperspectral imaging system and method based on sparse aperture compressing calculation correlation

Abstract

The invention relates to a hyperspectral imaging system and method based on sparse aperture compressing calculation correlation. The system comprises a sparse aperture unit, a free space collimation unit, a light beam reflecting unit, a beam spot combining unit, a mapping lens, a random optical modulation unit, a light expanding beam collimation unit, a spectrum light splitting unit, a convergence light collecting unit, an array light detector and a compressing calculation correlation module. Light signals on all light paths are respectively projected to the beam spot combining lens, a sparse aperture direct image is mapped to the random optical modulation unit, a sparse aperture imagining light field is modulated at random, a modulated light field strength signal enters the spectrum light splitting lens in an incidence mode, and then light field strength signals with different wavelengths are generated. The linear array light detector collects the light signals with the different wavelengths to form a measuring sequence of the different wavelengths. The random optical modulated matrix and a plurality of measuring sequences, measured in the synchronizing cycle, of the different wavelengths are transferred to the compressing calculation correlation module, images with the different wavelengths are reconstructed, and a real-time and high-resolution hyperspectral image is obtained.

Description

technical field [0001] The invention relates to the field of sparse aperture spectral imaging, in particular to a hyperspectral imaging system and method based on sparse aperture compression calculation correlation. Background technique [0002] Due to the needs of the military and the national economy, space (ground) optical remote sensing technology has developed rapidly in recent years, and various optical remote sensors have emerged as the times require, and their technical performance has also been rapidly improved and perfected. The development of imaging spectrometers is one of the obvious examples. [0003] The "spatial resolution method" is a commonly used method for identifying substances in the prior art, which uses the morphological characteristics of substances to distinguish different substances. This method has been, is and will be a very important means of identifying substances, but it is not always efficient. For example, if the measurement of chlorophyll...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome defects such as low light transmittance and narrow spectral response range of hyperspectral imaging spectrometers in the prior art, thereby providing an imaging system and method with high spatial resolution

Images