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Commit 43fca41

jonathanrjpereira jonathanrjpereira

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DFT

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Discrete Fourier Transformation
- dft.JPG
- dft.m

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`‎Discrete Fourier Transformation/dft.JPG‎`

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`‎Discrete Fourier Transformation/dft.m‎`

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	`1`	`+%Discrete Fourier Transform`
	`2`	`+`
	`3`	`+clc;`
	`4`	`+a=imread('cameraman.tif');`
	`5`	`+figure(1)`
	`6`	`+imshow(a)`
	`7`	`+a=double(a);`
	`8`	`+[row col]=size(a);`
	`9`	`+const=sqrt(row*col);`
	`10`	`+for n=0:1:row-1`
	`11`	`+ for k=0:1:col-1`
	`12`	`+ W(n+1,k+1)=exp(-i2pink/const);`
	`13`	`+ end`
	`14`	`+end`
	`15`	`+X=WaW.';`
	`16`	`+figure(2)`
	`17`	`+imshow(X)`
	`18`	`+ff=fft2(a)`
	`19`	`+`
	`20`	`+aimg=ifft2(ff);`
	`21`	`+figure(3)`
	`22`	`+imshow(abs(mat2gray(aimg)))`

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