1. 西安交通大学机械工程学院,西安,710049
2. 南通大学机械工程学院,江苏,南通,226019
网络首发:2009-06-10,
纸质出版:2009
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徐海黎 1, 2, 花国然 2, 等. 采用小世界免疫克隆算子的频率域图像配准[J]. 西安交通大学学报, 2009,43(6):38-42.
A Frequency Domain Approach to Image Registration Using Small World Clonal Selection Algorithm[J]. 2009, 43(6): 38-42.
为满足智能寻位加工中对零件图像配准速度和配准精度的高要求
提出了一种采用伪极快速傅里叶变换(PPFFT)和小世界-克隆选择算法(SWCSA)的图像配准方法(PPFFT-SWCSA).首先对图像进行伪极快速傅里叶变换
然后利用变换后获取的频谱特征信息设计优化算法的代价函数
最后采用SWCSA算法得到2幅图像间的配准参数.采用PPFFT降低了运算复杂性
提高了运算速度; 采用SWCSA算法
克服了图像配准中常用的相位相关法无法检测到图像间较小偏移量的缺点.实验结果表明
PPFFT-SWCSA方法的配准角度精度可以达到空间0.2°
在对图幅为256×256像素的图像配准实验中
PPFFT-SWCSA方法的配准速度比基于离散极坐标傅里叶变换和相位相关法的配准速度快2倍.
Owing to the demanding accuracy and speed for image registration in intelligent searching machining system
a registration method based on pseudo-polar fast Fourier transform(PPFFT)and small world clonal selection algorithm(SWCSA)is proposed. Firstly
PPFFT is done for the image. Secondly
a suitable fitness function is selected by using the magnitude of PPFFT. Lastly
registration parameters are obtained by SWCSA. With PPFFT
the complexity of computation is significantly lowered and the speed is accelerated. With SWCSA
the disadvantage that small translation can not be detected by phase correlation is eliminated. Experimental results demonstrate that the registration accuracy of rotation is up to 0.2°. In the 256×256 pixels image registration experiment
the speed of the proposed method is two times faster than that of discrete polar Fourier transform and phase correlation algorithm.
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