| 一种基于频域特征的仿射不变目标识别方法 |
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| 引用本文： | 吕文先,彭启民,吕玉增,黎俊. 一种基于频域特征的仿射不变目标识别方法[J]. 计算机研究与发展, 2009, 46(3) |
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| 作者姓名： | 吕文先 彭启民 吕玉增 黎俊 |
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| 作者单位： | 1. 中国科学院软件研究所综合信息系统技术国家级重点实验室,北京,100190;中国科学院研究生院,北京,100049
2. 中国科学院软件研究所综合信息系统技术国家级重点实验室,北京,100190 |
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| 摘 要： | 针对低信噪比图像中仿射不变目标的识别问题,提出了一种基于图像频域特征的识别方法.通过分析空频域仿射变换之间的关系,采取对边缘图像的傅氏频谱进行伪对数采样的特征提取方法,较好地提取了中低频特征,避免了光照变化带来的不利影响,抑制了高频噪声;使用神经网络进行识别,有效地提取了目标的仿射不变特征,识别速度快.实验仿真了识别率随噪声强度的变化情况.结果显示,在信噪比低于-20 dB时,识别率仍然高于90%,识别快速、稳定,优于基于Gabor滤波的识别方法.
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| 关 键 词： | 目标识别 频域 仿射变换 伪对数采样 不变性特征 |
An Affine-Invariant Objects Recognition Method Employing Features in Frequency Domain |
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| Lu Wenxian,Peng Qimin,Lv Yuzeng,Li Jun. An Affine-Invariant Objects Recognition Method Employing Features in Frequency Domain[J]. Journal of Computer Research and Development, 2009, 46(3) |
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| Authors: | Lu Wenxian Peng Qimin Lv Yuzeng Li Jun |
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| Affiliation: | National Key Laboratory of Integrated Information System Technology;Institute of Software;Chinese Academy of Sciences;Beijing 100190;Graduate University of Chinese Academy of Sciences;Beijing 100049 |
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| Abstract: | To recognize images under various view-angle in noised background is one of the most important and challenging problems that need be resolved.An approach using affine invariant features in frequency domain for object recognition in low signal noise ratio(SNR) images is presented.The relationship of affine transforms between spatial domain and frequency domain is analyzed.That is,the effect of affine transformation on the spectrum is almost the same as the affine transform on the object in spatial domain exc... |
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| Keywords: | object recognition frequency domain affine transform pseudo-log sampling invariant |
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