Fruit hardness prediction model establishment method, optical nondestructive testing method and system thereof

The invention discloses a fruit hardness prediction model establishment method, an optical nondestructive testing method and an optical nondestructive testing system, and relates to the technical field of optical detection.The testing method comprises the steps that S1, a light source emits light; s2, light beam shaping and filtering; s3, scattering the surface and the interior of the fruit sample; s4, narrow-band filtering is carried out; s5, acquiring an image; s6, performing image function fitting and coefficient extraction; s7, calculating a hardness prediction value H according to the fitting coefficient and the prediction model; the prediction model is described in the claim 1. The detection system comprises a light source, a light beam shaping device, a fruit to be detected, a lens, an image sensor, a narrow-band filter wheel, a controller and an image processing system. The detection method disclosed by the invention is simple, low in implementation cost and good in effect, and can be applied to non-c