کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4516045 | 1322340 | 2012 | 8 صفحه PDF | دانلود رایگان |

A digital imaging method was developed to determine the size, weight, volume and density of individual barley grains. Calibrations were developed using morphological measurements based on 2-D digital images, and were validated using a range of bulk barley samples.The validation of the grain diameter (minor) and grain weight algorithms gave high correlation coefficients (r = 0.93 and 0.97, respectively, P < 0.01), with low standard errors (0.09 mm and 1.37 mg, respectively) when compared to physical measurements.Estimated grain volume and density from image data, using three different mathematical approaches were compared: Model 1, a general ellipsoid; Model 2, a combination of two cone frustums with an ellipse top and base; and Model 3, a set of elliptical cylinders representing pixels along the image length. Derived grain volume data using Model 2 when compared to gas displacement volume measurements gave significant correlations (r = 0.97, P < 0.01) with the lowest standard error (0.97 mm3), in contrast to volume data estimated using Model 1 and Model 3. Even though Model 2 gave accurate and precise results for grain volume, Model 1 (with the slope adjusted) gave the highest correlation (r = 0.63, P < 0.01) with the lowest standard error (0.055 mg/mm3) for estimating grain density from image data, compared to gas displacement density measurements.
► Morphological traits were calculated from 2-D digital images of single barley grains.
► Grain length, diameter, and weight were calculated using regression equations.
► Grain volume and density were compared using different geometrical algorithms.
► Estimated morphological traits were highly correlated to physical grain measurements.
Journal: Journal of Cereal Science - Volume 55, Issue 1, January 2012, Pages 61–68