| 汽车发动机进气歧管高精度亚像素边缘检测 |
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| 引用本文： | 徐平,薛凌云,常英杰.汽车发动机进气歧管高精度亚像素边缘检测[J].计量学报,2018,39(3):321-325. |
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| 作者姓名： | 徐平 薛凌云 常英杰 |
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| 作者单位： | 杭州电子科技大学 生命信息与仪器工程学院, 浙江 杭州 310018 |
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| 基金项目： | 国家自然科学基金青年科学基金(61205200); 国家自然科学基金联合基金(U1609218); 国家重大科研仪器研制项目(61427808) |
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| 摘 要： | 提出基于边缘像元投影的汽车发动机进气歧管高精度亚像素边缘检测方法。利用物体边缘投影将其所穿过的感光单元划分2个部分,边缘像素单元的最终灰度值为投影两侧局部灰度统计值的面积加权平均值,并利用矩形邻域建模求得边缘亚像素的准确位置。对汽车发动机进气歧管的实验结果表明,与基于曲面拟合的亚像素边缘检测方法相比,对50.00mm×40.00mm规格产品,长短轴标准差分别降低了1.71%和17.78%,对50.05mm×40.05mm规格产品,长短轴标准差分别降低了38.66%和2.03%。
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| 关 键 词： | 计量学 进气歧管 边缘像元投影 亚像素边缘检测 梯度交点 |
| 收稿时间： | 2016-10-08 |
Subpixel Edge Detection with High Precision for Vehicle Engine Intake Manifolds |
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| XU Ping,XUE Ling-yun,CHANG Ying-jie.Subpixel Edge Detection with High Precision for Vehicle Engine Intake Manifolds[J].Acta Metrologica Sinica,2018,39(3):321-325. |
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| Authors: | XU Ping XUE Ling-yun CHANG Ying-jie |
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| Affiliation: | College of Life Info Science & Instr Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China |
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| Abstract: | An accurate subpixel edge detection method based on edge pixel projection for vehicle engine intake manifolds is proposed. The light-sensitive cells on the edges are divided into two different parts. The final gray value of the edge pixel is calculated by weighted average of its both side gray statistics values. The accurate subpixel edge can be obtained by the rectangle neighbourhood model. Compared with the method based on surface fitting, experimental results show that, for the 50.00mm×40.00mm product, the standard deviation of major axis and minor axis decreases by 1.71% and 17.78%, respectively, and for the 50.05mm×40.05mm product, the standard deviation of major axis and minor axis decreases by 38.66% and 2.03%, respectively. |
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| Keywords: | metrology intake manifold edge pixel projection subpixel edge detection gradient intersection |
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