On-line detection and sorting method and device for moldy core integrating internal and external quality of apples

The invention discloses a moldy core on-line detection and sorting method and device integrating internal and external quality of apples, and relates to the technical field of fruit quality on-line detection and sorting. The diffuse transmission spectrum (namely spectral data) is corrected by using the attenuation coefficient of light in the apple, the negative influence caused by the external quality of the apple is weakened, and the mold core disease judgment is performed based on the spectrum after the fruit diameter correction, so that the judgment precision of the mold core disease apple can be remarkably improved. According to the method, the correlation between the SSC (Soluble Solids Content) and the apple mold core is utilized, a VMD algorithm and a PLS-DA (Partial Least Squares-Discriminant Analysis) algorithm are adopted to construct a mold core discrimination model, and the discrimination accuracy can be improved. In addition, based on the moldy core detecting and sorting device provided by the in