How to remove frequency components in an image

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Jim 2012-5-9

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https://ww2.mathworks.cn/matlabcentral/answers/37931-how-to-remove-frequency-components-in-an-image

评论： Image Analyst 2019-2-20

How can I use the fourier transform to find out the frequency components which are responsible for the texture on the surface?

Then I have to remove them to have a smooth surface without texture.

you can see the image in the following link: http://image3243.blogspot.se/2012/05/blog-post.html

Thanks in advance

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Walter Roberson 2012-5-10

In one of your duplicate posts, which I have now deleted, Image Analyst commented,

'Like I said in a comment on one of your other numerous posts on this subject: "Jim, you've got to stop the duplicate posts. You do this frequently, and then people like Wayne waste their time telling you how to do a high pass filter when I've already told you that a high pass filter is not the way to go."'

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回答（1 个）

Image Analyst 2012-5-9

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https://ww2.mathworks.cn/matlabcentral/answers/37931-how-to-remove-frequency-components-in-an-image#answer_47316

Take the 2D FFT. Look for spikes in the 2D FFT and zero them out. Inverse transform and display.

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Nbillah 2019-2-19

Hi, @Image Analyst, thank you very much for the code, very helpful. I have one question for you i.e how did you decide the value for amplitudethreshold=10.9?