戚利勇,高峰,谭豫之,杨庆华.基于归一化椭圆傅里叶描述子的黄瓜形状识别[J].农业机械学报,2011,42(8):164-167,142.
Qi Liyong,Gao Feng,Tan Yuzhi,Yang Qinghua.Cucumber Shape Description Based on Elliptic Fourier Descriptor[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(8):164-167,142.
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基于归一化椭圆傅里叶描述子的黄瓜形状识别   [下载全文]
Cucumber Shape Description Based on Elliptic Fourier Descriptor   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  黄瓜  形状描述  边界  傅里叶描述子
基金项目:国家高技术研究发展计划(863计划)资助项目(2009AA04Z209);浙江省自然科学基金杰出青年团队资助项目(R1090674);浙江省机械电子工程重中之重学科开放基金资助项目(20090324)
作者单位
戚利勇 浙江工业大学 
高峰 浙江工业大学 
谭豫之 中国农业大学 
杨庆华 浙江工业大学 
中文摘要:为定量描述水果形状以便为后续识别提供特征信息,以黄瓜为研究对象,通过对黄瓜图像进行增强、阈值、形态学及边界提取操作,提取黄瓜边界并用数对表示。采用椭圆傅里叶描述子定量描述边界信息,并做尺度变换、旋转变换及起始点变换归一化处理。利用描述子对黄瓜边界进行重建,对重建后边界做误差分析。实验结果表明:采用椭圆傅里叶描述法,只需少量描述子即可完成黄瓜形状识别,并可准确重建原始形状。
Qi Liyong  Gao Feng  Tan Yuzhi  Yang Qinghua
Zhejiang University of Technology;Zhejiang University of Technology;China Agricultural University;Zhejiang University of Technology
Key Words:Cucumber  Shape description  Boundary  Fourier descriptor
Abstract:Aiming at identifying the shape of arbitrary object quickly and accurately, cucumber was taken as a research object. The boundary of cucumber image was extracted through digital image processing including image enhancing, threshold processing, morphological operations and edge extraction operation. Then elliptic Fourier descriptors were used to describe the boundary information of cucumber quantitatively, and the elliptic Fourier descriptors were normalized at start point,rotation and size after that. The cucumber shape was reconstructed by using different numbers of harmonics of elliptic Fourier descriptors with error analysis. The experiment results showed that the complex shape of cucumber could be described by a small amount of elliptic Fourier descriptor through the description of elliptic Fourier method, and the elliptic Fourier descriptor could reconstruct the original shape accurately.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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