CONFLICT OF INTEREST STATEMENT The authors declare no conflicts of interest. Supporting Information Filename Description jfds17444-sup-0001-Figures.docx1.4 MB Figure S1 Schematic diagram of the imaging system. Figure S2 Example of the irregular cross-sectional features of pelletized red pepper grain (marked in white dashed line). Figure S3 Linear fit results of CNN fusion model. (A) LL-CNN, (B) ML-CNNconv1, (C) ML-CNNconv2, (D) ML-CNNconv3, (E) ML-CNNconv4, (F) ML-CNNconv5, and (G) HL-CNN.