Salt additive content detection method based on near infrared spectrum imaging

The invention discloses a near infrared spectrum imaging-based salt additive content detection method, which comprises the following steps of: firstly, collecting salt samples at different depths on an assembly line before and after spraying an additive, and paving salt combinations at different depths on a to-be-detected platform; performing imaging determination on the table salt on the platform by using a near infrared spectrum; presuming the overall average moisture content of the salt before and after the additive is sprayed through a near infrared spectrum; finally, presuming the salt additive content according to the average moisture content before and after the additive is sprayed on the mixed salt samples at different depths. The method provided by the invention can well eliminate the interference of impurities in the salt on the additive, has the characteristics of accurate detection result, high speed and no damage to a detection sample, is simple and convenient to operate, and is suitable for asse