Wide-waveband large-span tuned filter single-channel colorful low-level-light night vision method and device

Abstract

The invention discloses a wide-waveband large-span tuned filter single-channel colorful low-level-light night vision method and device. The method comprises the following steps of: installing a dual-waveband tuned filter based on low-light-level night vision spectrum break points on a low-light-level imaging detector array of a single-channel low-light-level image detecting system, controlling the dual-waveband tuned filter by frame synchronizing signals so as to alternatively cut the low-level-light waveband into a low-light-level long-waveband and a low-light-level short-waveband according to frame frequency, imaging the low-light-level long-waveband and the low-light-level short-waveband respectively to obtain an image frame sequence with alternated low-light-level long-waveband and low-light-level short-waveband, and storing a long-waveband frame and a short-waveband frame, performing image fusion on the low-light-level long-waveband and short-waveband images to obtain a dual-spectrum fusing image, and performing adjustment and color space mapping on the low-light-level long-waveband and short-waveband images and the dual-spectrum fusing image according to two-dimensional column diagram distribution and three primary color energy ratio of real colorful images of a scene in the day to obtain a wide-waveband large-span tuned filter single-channel colorful low-level-light night vision image. The wide-wave band large-span tuned filter single-channel colorful low-level-light night vision method and device obviously improve the image quality of the traditional night vision system, and increase the probability of detecting and identifying targets.

Description

technical field [0001] The invention belongs to single-channel color low-light night vision technology, in particular to a single-channel color low-light night vision method and device with wide band and large span tuning filter. Background technique [0002] Color night vision is to effectively extract multi-band, multi-sensor image information to form a unified color night vision image, so that observers can distinguish and identify scenes and targets by relying on brightness differences and color differences. The traditional single-channel low-light imaging detection system is mainly composed of an optical system and a low-light imaging detector, and the images obtained by it are all grayscale images, while the single-channel color night vision technology On the basis of the system, by adding filters, the low-light band is divided into multiple sub-bands according to time or space, so that multi-band image information can be obtained from a single low-light imaging detect...

AI Technical Summary

Problems solved by technology

[0004] In the above studies, the single-channel color low-light imaging based on inter-frame compensation divides the field of view in a stripe-like manner in space, and its stripe effect is difficult to eliminate; the rest is multi-spectral imaging, which has high-precision spectral performance and narrow spectral width.

However, due to the narrow spectral width (20nm), it is not conducive to the application of low-light night vision

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