...采样；多相滤波；镜频抑制比 [gap=880]Keywords：IF sampling;quadrature sampling;polyphase filtering;image frequency ratio ...
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image frequency rejection ratio 镜频抑制比 ; 像频抑制比
image frequency refusal ratio 像频抑制比
Image frequency rejection ratio filter 镜频抑制滤波器
image frequency ratio
象频比
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The circular region F-norms in low frequency band of wavelet transform is used as color feature of the image and the energy ratio of high frequency band is used to form texture descriptor.
颜色特征采用整数小波低频系数矩阵中环形区域的F -范数，纹理特征则采用高频部分的能量比值。
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