title: Near-infrared imaging spectroscopy based on sugar absorption band for melons.
abstract: A method for visualizing the sugar content in the flesh of melons was developed. This method was based on the sugar absorption band in the near-infrared (NIR) region to avoid bias caused by the color information of a sample. NIR spectroscopic analysis revealed that each of the two second-derivative absorbances at 874 and 902 nm had a high correlation with the sugar content of melons. A high-resolution cooled charged couple device camera with band-pass filters, which included the above two wavelengths, was used to capture the spectral absorption image of a half-cut melon. A color distribution map of the sugar content on the surface of the melon was constructed by applying the NIR spectroscopy theory to each pixel of the acquired images.
authors.affiliation: National Food Research Institute, 2-1-12 Kan-nondai, Tsukuba, Ibaraki 305-8642, Japan. mizukit@affrc.go.jp
authors.forename: Mizuki
authors.initials: M
authors.lastname: Tsuta
authors.forename: Junichi
authors.initials: J
authors.lastname: Sugiyama
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Sagara
mesh_terms: D002241:Carbohydrates / Q000032:analysis*; D028462:Cucumis / Q000737:chemistry*; D007091:Image Processing, Computer-Assisted; D010858:Pigmentation; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
chemical_list: D002241:Carbohydrates