A Snapshot Hyperspectral Camera with High Dynamic Response Range

Abstract

The invention discloses a snapshot hyperspectral camera with a high dynamic response range, which performs multiple imaging of the same target object with different exposure times, obtains multiple hyperspectral images with different exposures and low dynamic ranges, and then uses The multi-exposure image fusion algorithm synthesizes these images into a snapshot hyperspectral image with high dynamic range. By expanding the dynamic response range of the snapshot hyperspectral camera, the simultaneous spectral detection of different regions of the measured target can be more effectively realized. The snapshot hyperspectral camera provided by the present invention not only has its own significant advantages, including the immobilization of internal components, the measurable wavelength range includes the visible to the middle and far infrared bands, and has faster detection speed and higher stability, etc. It can also greatly improve the dynamic response range of the camera. In addition, the camera reduces the need for expensive specialized detectors, greatly reducing the manufacturing cost of snapshot hyperspectral cameras.

Description

technical field [0001] The invention relates to the technical field of hyperspectral imaging, in particular to a snapshot hyperspectral camera with a high dynamic response range. Background technique [0002] The dynamic range refers to the ratio between the maximum value and the minimum value of a certain physical quantity: Specifically, for an actual scene, the dynamic range refers to the ratio of the light radiance of the brightest and darkest parts of the scene. For displays, dynamic range refers to the ratio of the maximum brightness to the minimum brightness radiated by the screen. For a camera, dynamic range is the ratio between the brightness at which its colors are just saturated and the brightness at which noise degradation occurs. That is to say, in the field of photographic imaging, dynamic range is the ratio between two brightness values. The larger the dynamic range, the richer the layers that can be expressed, and the wider the color space it contains. [0...

AI Technical Summary

Problems solved by technology

However, the cost of realizing high dynamic range imaging through hardware is very high. Therefore, the mainstream way to achieve high dynamic range imaging is software, that is, the multi-exposure image fusion algorithm.

[0004] Although the snapshot hyperspectral camera itself has many significant advantages such as internal components immobilization, fast detection speed and high stability, but because it contains hardware devices with limited dynamic range such as CCD or CMOS, it is in When the hyperspectral image of the target object is acquired, some bright and dark details of the target object will be lost, which will affect the overall performance of the snapshot hyperspectral camera

[0005] Therefore, there is an urgent need to develop a snapshot hyperspectral camera capable of acquiring high dynamic range images, so as to avoid the loss of some bright and dark details of the target object due to the limitation of dynamic range, so as to achieve the purpose of real-time and accurate monitoring

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