High-speed high-precision spectral video system and method for flame shooting

Abstract

The invention discloses a high-speed high-precision spectral video system and method for flame shooting. According to the system, an optical signal of a desired wavelength band is filtered by a filtermodule; a light splitting module divides the signal of the filter module into the same two-segment light beams to enter a coding aperture module and an RGB information acquisition module respectively; the coding aperture module performs sparse sampling on the optical signal; a color dispersion module performs color dispersion on the optical signal and transmits the optical signal to a grayscale information acquisition module; and a data reconstruction module is used for carrying out aligning and de-noising on the two paths of signals from the grayscale information acquisition module and the RGB information acquisition module, and performing reconstruction by a bilateral filter algorithm, and next, providing the result to a display module for storage and display. Aiming at a flame scene, wide and narrow spectral band filter sheets and corresponding masks are utilized, so that spectral reconstruction at low number of sampling points can be carried out, a wide-bandwidth flame spectrum characteristic is obtained, spectral reconstruction under high number of sampling points can be carried out on a relatively narrow spectral band near a flame characteristic peak, and high-accuracy spectral data is obtained.

Description

technical field [0001] The invention relates to the fields of computational imaging and combustion diagnosis, in particular to a high-speed and high-precision spectral video system and method for shooting flames. Background technique [0002] Traditional cameras mimic the human eye, using Bell filters to record measurements on the sensor, but this approach loses a lot of spectral detail. The hyperspectral imaging system is committed to measuring dozens or even hundreds of spectral samples for each pixel, and the obtained hyperspectral image can be regarded as a three-dimensional data cube, in which two dimensions constitute a plane space, and the third dimension is the spectrum. High-resolution spectral images of internal details can reveal the inherent properties of the subject and ambient light. Such data has important applications in many fields, such as military, agriculture, mineral detection and identification, and criminal investigation. [0003] In the field of com...

AI Technical Summary

Problems solved by technology

However, traditional flame spectrum measurement, using single-point or scanning spectrometers, cannot obtain dynamic spectral data with two-dimensional spatial resolution at the same time.

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