Under the condition of space moving changed system and the engineering practice , a function of the pixel dimension , the mtf of ccd sensor imaging , the width of target strip and the image motion has been acquired 4 . under the condition of one pixel image motion and the nyquist frequencies , adopting the convolution method , the ratios of the mtf with image motion to the idea mtf are 0 . 667 这样就为在工程实际中,在空间移变条件下,求取了ccd探测器影像的mtf 、像元尺寸、影像分辨力和像移量四者之间的一个简洁的函数关系:材了万二1一( 2 + n一m ) 2 ? o4n4 .采用仿真的方法和采用卷积方法的比较。
百科解释
The Nyquist frequency, named after the Swedish-American engineer Harry Nyquist, is half the sampling frequency of a discrete signal processing system. It is sometimes known as the folding frequency of a sampling system.