基于图像轮廓分析的堆叠葡萄果粒尺寸检测

提出一种堆叠葡萄果粒尺寸检测算法:首先通过8 -邻域轮廓跟踪提取果穗轮廓曲线,然后基于改进的曲线旋转和局部极值判断方法搜索曲线上的凹点,从而将曲线分割成分段圆弧以实现果粒的分割和识别,进而采用最小二乘分段曲线拟合计算果粒直径.通过对巨峰葡萄的检测试验表明,该算法对葡萄果穗的果粒正确识别率在35％左右,用于统计葡萄的平均果粒直径,平均误差为0.61 mm,最大误差为1.69 mm,根据果粒大小分级的准确率为72.7％.

Overlapped Grapes Berry Size Inspection Based on Image Contour Analysis

An algorithm was presented to detect size of berries on grapes bunch.Firstly,the contour curves of the grapes bunch were extracted by contour tracking.Then concave points were detected by rotating the curve continuously and searching local extremum points so that the curves were divided into circular arcs,in which each arc corresponds to one berry of the grapes.Finally,the least-square curve fitting method was applied to calculate the radius of the berries.Experiments of Jufeng grapes showed that by using t...