Determination of watermelon volume using ellipsoid approximation and image processing

被引:94
作者
Koc, Ali Bulent [1 ]
机构
[1] Harran Univ, Fac Agr, Dept Agr Machinery, Sanliurfa, Turkey
关键词
volume; watermelon; ellipsoid approximation; image processing;
D O I
10.1016/j.postharvbio.2007.03.010
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Watermelon (Citrullus lanatus) volume was measured using water displacement, ellipsoid approximation and image processing methods. The length and major and minor diameters of each watermelon were used in the ellipsoid approximation method. Eight-bit surface images of each watermelon, captured with a low-cost CMOS camera, were utilized in the image processing method. The volume obtained from ellipsoid approximation and image processing was compared to the volume determined by the water displacement method using the paired t-test and the Bland-Altman approach. The volume estimated by ellipsoid approximation was significantly different from the volume determined by water displacement (P < 0.05), while the volume determined by image processing was not significantly different from the volume determined by water displacement (P > 0.05). There was a mean difference of -0.467L(95% confidence interval: -0.625 and -0.310L; P < 0.0001) between the water displacement and ellipsoid approximation methods. The mean difference between water displacement and image processing was -0.218 L (95% confidence interval: -0.603 and 0.166 L; P = 0.243). Image processing provides a simple methodology to estimate watermelon volume and can be easily implemented in monitoring the growth rate of watermelons in the field, monitoring yield during mechanical harvesting, estimating the weight of individual watermelons and postharvest sorting of watermelons indoors. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:366 / 371
页数:6
相关论文
共 13 条
[1]  
[Anonymous], P 2004 NZ NAT C NOND
[2]  
[Anonymous], 2006, IMAGEJ
[3]   Measuring agreement in method comparison studies [J].
Bland, JM ;
Altman, DG .
STATISTICAL METHODS IN MEDICAL RESEARCH, 1999, 8 (02) :135-160
[4]  
Forbes K. A., 1999, 1999 IEEE Africon. 5th Africon Conference in Africa (Cat. No.99CH36342), P107, DOI 10.1109/AFRCON.1999.820775
[5]   Carrot volume evaluation using imaging algorithms [J].
Hahn, F ;
Sanchez, S .
JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 2000, 75 (03) :243-249
[6]   Using early-season measurements to estimate fruit volume at harvest in kiwifruit [J].
Hall, AJ ;
McPherson, HG ;
Crawford, RA ;
Seager, NG .
NEW ZEALAND JOURNAL OF CROP AND HORTICULTURAL SCIENCE, 1996, 24 (04) :379-391
[7]   Electronic device for measuring volume of selected fruit and vegetables [J].
Jarimopas, B ;
Nunak, T ;
Nunak, N .
POSTHARVEST BIOLOGY AND TECHNOLOGY, 2005, 35 (01) :25-31
[8]   A simple model for rapid and nondestructive estimation of bell pepper fruit volume [J].
Ngouajio, M ;
Kirk, W ;
Goldy, R .
HORTSCIENCE, 2003, 38 (04) :509-511
[9]   The first bovine β1,4-galactosyltransferase reaction with an acyclic acceptor substrate, 3-acetamido-1,2-propanediol, to yield a 3-O-β-D-galactopyranosyl-sn-glycerol skeleton [J].
Nishida, Y ;
Tamakoshi, H ;
Kobayashi, K ;
Thiem, J .
ORGANIC LETTERS, 2001, 3 (01) :1-3
[10]  
Riddle D.F., 1979, CALCULUS ANAL GEOMET, P505