Discriminating hidden bruises in loquat by attenuation coefficients estimated from optical coherence tomography images

•OCT is tried as a non-destructive method for loquat internal quality.•OCT device acquires images of sub-surface structure of loquat.•Attenuation coefficients are related to con-focal signal scattering model.•Attenuation coefficients of ROIs are fitted by OCT A-scan signals.•Attenuation coefficients can be used for loquat hidden bruises discrimination.