Light source spectrum and multispectral reflectivity image acquisition methods and apparatuses, and electronic device

A multispectral reflectance image acquisition method, comprising:

• acquiring a multispectral image, and determining a multispectral response value of each pixel in the multispectral image;
• reconstructing an RGB image according to the multispectral image;
• converting the RGB image into a grayscale image;
• and
• determining a target region in the grayscale image, wherein in the target region a grayscale value is less than or equal to a threshold, and calculating a light source spectrum response value according to multispectral response values of pixels of the multispectral image corresponding to the target region;
• and
• acquiring a multispectral reflectance image according to the multispectral response value of each pixel in the multispectral image and the light source spectrum response value.

An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, is configured to perform operations comprising:

• acquiring a multispectral image, and determining a multispectral response value of each pixel in the multispectral image;
• reconstructing an RGB image according to the multispectral image;
• converting the RGB image into a grayscale image;
• and
• determining a target region in the grayscale image, wherein in the target region a grayscale value is less than or equal to a threshold, and calculating a light source spectrum response value according to multispectral response values of pixels of the multispectral image corresponding to the target region.