计算机工程与应用2011，Vol.47Issue(27)：185-188,198,5.DOI:10.3778/j.issn.1002-8331.2011.27.050
应用分数阶傅里叶变换的形状描述方法研究
Study on shape description under fractional fourier transform.
摘要
Abstract
Fourier descriptor is an essential way for shape description.As a generation of Fourier transform, the fractional Fourier transform has been widely used in the field of digital signal processing projects,but there has been few research reports of applying it to shape analysis.In this paper,it's the first time to study the method of shape description under fractional Fourier transform, comparing the image retrieval performances of fractional Fourier descriptors with different fractional orders.Retrieval tests are conducted on MPEG-7 contour shape database CE-l.The retrieval results of fractional Fourier descriptors with different orders to different type of shape distortions are fully analyzed.When the order is 0.1, the fractional Fourier descriptor performs worst.With the growth of the order, retrieval results of the fractional Fourier descriptors become better and better.When the order changes to 1.0, the fractional Fourier descriptor performs best.Meanwhile, comparing with the Zernike moment:When the order is 0.1,the Zernike moment gets better result.When the order is 0.1 and 1.0,the fractional Fourier descriptors get better results.关键词
图像检索/形状描述/傅里叶描述子/分数阶傅里叶变换Key words
image retrieval/shape description/Fourier descriptors/fractional Fourier transform分类
信息技术与安全科学引用本文复制引用
张婉婷,王斌..应用分数阶傅里叶变换的形状描述方法研究[J].计算机工程与应用,2011,47(27):185-188,198,5.基金项目
江苏省自然科学基金(the Natural Science Foundation of Jiangsu Province of China under Grant No.BK2009348) （the Natural Science Foundation of Jiangsu Province of China under Grant No.BK2009348）
江苏省高校自然科学研究计划(No.08KJB510002). （No.08KJB510002）
