Binocular imaging underwater spectral reflectivity in situ measurement device and method

Abstract

The invention discloses a binocular imaging underwater spectral reflectivity in situ measurement device and method. The binocular imaging underwater spectral reflectivity in situ measurement device comprises a binocular spectral imaging subsystem, an underwater broadband-spectrum LED (light emitting diode) light source, a water attenuation coefficient measurement instrument, a control unit, a receiving side optical transceiver, an upper computer and a support, wherein the binocular spectral imaging subsystem is composed of a first underwater spectral imaging instrument and a second underwaterspectral imaging instrument, which are completely identical in parameters and synchronously collect an underwater target spectral image sequence; the water attenuation coefficient measurement instrument is fixed onto the support for measuring the optical attenuation coefficient of waters; the first underwater spectral imaging instrument, the second underwater spectral imaging instrument, the underwater broadband-spectrum LED light source and the water attenuation coefficient measurement instrument are connected with the control unit, the control unit is connected with the receiving side optical transceiver, and the receiving side optical transceiver is connected with the upper computer. The binocular imaging underwater spectral reflectivity in situ measurement device can achieve in situ, quantitative and accurate measurement of the surface spectral reflectivity of an underwater target.

Description

technical field [0001] The invention relates to an underwater spectral reflectance measurement device, in particular to a binocular imaging type underwater spectral reflectance in-situ measurement device and a measurement method. Background technique [0002] The spectral reflectance of the surface of an object is the ratio between the spectral radiant energy reflected by the surface of the object and the spectral radiant energy incident on the surface of the object. The characteristic of object spectral reflectance has been widely used in satellite remote sensing, agriculture, food, biomedicine, military and other fields, but related research and applications are mainly concentrated on land and sea, while underwater research and applications are relatively less. [0003] With the continuous deepening of human research on the ocean, people's requirements for underwater environment monitoring and detection are also increasing. Researchers from all over the world are actively...

AI Technical Summary

Problems solved by technology

However, due to the process of light transmission in water, the water body (including water, suspended particles in water, dissolved substances in water, etc.) will have serious absorption and scattering attenuation of light, resulting in the overall weakening of light energy and the relative energy of different wavelengths. The distribution changes, therefore, it is necessary to perform water attenuation compensation on the original underwater spectral image to restore the real spectral information of the object surface

U.S. Patent (CN 203444122 U, US Patent 8,767,205) proposes an underwater hyperspectral imaging system, and works in cooperation with an underwater ranging device to compensate for the effect of water body attenuation and obtain underwater spectral image information. However, due to its imaging The method is only for imaging surface detection, and the three-dimensional information of the object surface cannot be obtained, so there is a spectral information compensation error, and the system cannot obtain the spectral reflectance data of the underwater object surface in situ

Images