手法を比較

	成熟度指数	果実の色分析
分野	園芸学	園芸学
系統	Process / pipeline	Process / pipeline
提唱年	1970	1976
提唱者	Pomology and horticulture research	Commission Internationale de l'Eclairage (CIE)
種類	multi-parameter assessment pipeline	optical measurement pipeline
原典	Pratt, H. K., & Goeschl, J. D. (2006). Physiological roles of ethylene in plants. Annual Review of Plant Physiology, 20, 541–566.	McGuire, R. G. (1992). Reporting objective color measurements. HortScience, 27(12), 1254–1255.
別名	maturity index, harvest readiness assessment, fruit maturation scoring	color grading, chromatic analysis, colorimetry, ripeness grading
関連	4	4
概要	Ripeness index combines multiple quality measurements—soluble solids, firmness, color, starch degradation, ethylene production—into a single composite score indicating fruit maturity and harvest readiness. Unlike single-parameter metrics, this integrated approach accounts for cultivar variation and environmental influence to predict consumer acceptability more reliably. It is widely adopted in export industries and research settings to standardize harvest decisions.	Fruit color analysis employs spectrophotometric measurement to quantify ripeness and quality based on chromatic properties. Using the CIE L*a*b* color space, introduced in 1976, this non-destructive method objectively grades fruit maturity and predicts sensory acceptability. It is widely applied in commercial sorting lines and research settings for precision quality control.