文章基本信息

标题：An image sub-pixel edge detection algorithm of plant roots based on non-linear fourth-order interpolation method
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作者：Wu Peng ; Li Wenlin ; Song Wenlong 等
期刊名称：International Journal of Hybrid Information Technology
印刷版ISSN：1738-9968
出版年度：2014
卷号：7
期号：3
页码：275-284
DOI：10.14257/ijhit.2014.7.3.26
出版社：SERSC
摘要：To improve the accuracy of digital image edge detection, an ENO nonlinear fourth-order interpolation based subpixel edge detection algorithm was proposed in this paper. A stencil was constructed through classical Canny operator, followed by processing gray images to generate gradient images. ENO nonlinear fourth-order interpolation was applied in the gradient direction of target edges, and then subpixel subdivision computation was performed to obtain subpixel accurate locations of target edges, the performance of our edge detection algorithm was compared with that of centered cubic convolution and non-centered cubic convolution based edge detection methods. Simulation results demonstrated that the ENO based interpolation detection algorithm improved the abilities of detecting image edges.
关键词：edge detection; subpixel; ENO interpolation; Canny operators