tree with white decoration

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oscillator
oscillator 2022-2-20
So, we were given this picture of a tree that had a white line around it . We are asked to isolate the pixels of it in (x,y) cooridinates , then find the Fourier series coefficients based on those coordinates . I explain in the picture, y[n]=y coordinates of the white decoration and x[n]=x coordinates of the white decoratives. So I have found x,y, but I don't know how to find the Fourier Series coefficients and we are also asked to use the first 50 of them to reform the shape only of the white decoratives. I also have to say that when I plotted x,y my shape was not properly oriented (picture2)
Can anyone please give me an example code for those 2 questions , ? We have to use fft() function.
also since my shape is not properly oriented does that mean my y,x are wrong?
Also my deadline is very close ..........
  8 个评论
oscillator
oscillator 2022-2-20
In the next question we are asked to rebuild the original shape using the first M+1 coefficients of the discrete Fourier series and we are ought to use specifically the function imshow().
As for the originall image I'm not sure if I should post it ,since it is our professor's image ( I mean without his permission...)
Image Analyst
Image Analyst 2022-2-20
I see. You could always grab one off the internet, but I don't think your professor would like you using our code. Aren't you supposed to write your own code?

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