Then, a new two-step filtering method has been extracted according to the f eature of reference image.The first step one is homomorphic filtering and the s econd step is minimum variance filtering.是什么意思_Then, a new two-step filtering method has been extracted according to the f eature of reference image.The first step one is homomorphic filtering and the s econd step is minimum variance filtering.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句