Original basic as uniform area, affected by the gaussian white noise, after Fourier transform, seen in the center of the cross bright line, cannot understand, below is the Fourier transform before and after the figure (in the middle with a logarithmic amplitude conversion)

CodePudding user response:

Mark, I'm a beginner

CodePudding user response:

Understand the Fourier transform, look at the physical meaning of the Fourier transform

CodePudding user response:

[url=https://image.baidu.com/search/index?tn=baiduimage&ipn=r&ct=201326592&cl=2&lm=-1&st=-1&fm=index&fr=&hs=0&xthttps=111111&sf=1&fmq=&pv=&ic=0&nc=1&z=&se=1&showtab=0&fb=0&width=&height=&face=0&istype=2&ie=utf-8&word=%E5%82%85%E7%AB%8B%E5%8F%B6%E5%8F%98%E6%8D%A2&f=3&oq=%E5%82%85%E7%AB%8B%E5%8F%B6&rsp=0] [/
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CodePudding user response:

Would you like to see? I think it is because of the airspace image actually is multiplied by a rectangular window the rect (x) the rect (y), so in the frequency domain sinc stripe center