Journal
JOURNAL OF FOOD ENGINEERING
Volume 93, Issue 2, Pages 229-235Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2009.01.028
Keywords
Fruit; Multispectral; Vision; Ripeness; Firmness; Maturity; Non-destructive; Quality; Visible spectra; Chlorophyll; Peach
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Funding
- Madrid Regional Government
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Two multispectral maturity classifications for red soft-flesh peaches ('Kingcrest', 'Rubyrich' and 'Richlady' n = 260) are proposed and compared based on R (red) and R/IR (red divided by infrared) images obtained with a three CCD camera (800 nm, 675 nm and 450 nm). R/IR histograms were able to correct the effect of 3D shape on light reflectance and thus more Gaussian histograms were produced than R images. As fruits ripened, the R/IR histograms showed increasing levels of intensity. Reference measurements such as firmness and visible spectra also varied significantly as the fruit ripens, firmness decreased while reflectance at 680 nm increased (chlorophyll absorption peak). (C) 2009 Elsevier Ltd. All rights reserved.
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