Method for detecting total acid content of fermented grains based on hyperspectral imaging technology

The invention provides a method for detecting the total acid content in fermented grains based on a hyperspectral imaging technology, and the method comprises the following steps: collecting a fermented grain sample, and determining the total acid content of the fermented grains; acquiring and correcting a hyperspectral image by using a hyperspectral imaging system, and acquiring average spectral information and color information of the region of interest; sNV-SG preprocessing is carried out on the spectral information; using RC-SPA to screen the characteristic wavelength of the spectrum, and obtaining the hyperspectral characteristic value of each sample; constructing a regression model according to fusion data of the characteristic value and the color information and the total acid content; taking the hyperspectral characteristic value of the to-be-detected sample as the input of the regression model to obtain the total acid content of the to-be-detected fermented grains; and carrying out visual analysis on