please any one correct the code attached below

%(Image Enhancement)
image=imread('thumb.jpg');
function [final]=fftenhance(image,f)
I = 255-double(image);
[w,h] = size(I);
%out = I;
w1=floor(w/32)*32;
h1=floor(h/32)*32;
inner = zeros(w1,h1);
for i=1:32:w1
for j=1:32:h1
a=i+31;
b=j+31;
F=fft2( I(i:a,j:b) );
factor=abs(F).^f;
block = abs(ifft2(F.*factor));
larv=max(block(:));
if larv==0
larv=1;
end;
block= block./larv;
inner(i:a,j:b) = block;
end;
end;
final=inner*255;
final=histeq(uint8(final));

[Sriram Tadavarty]

What's the issue or error that you are facing? Can you attach the image thumb.jpg with the paperclip icon?

[indrani dalui]

function [final]=fftenhance(image,f)

I = 255-double(image);

error:

Error in enh (line 3)

I = 255-double(inputimage);

[Ameer Hamza]

indrani, post the complete error message.

[indrani dalui]

dear sir,

attached the code here with error message

%(Image Enhancement)
function [final] = fftenhance (image,f)
I = 255-double (image);
[w,h] = size(I);
%out = I;
w1=floor(w/32)*32;
h1=floor(h/32)*32;
inner = zeros(w1,h1);
for i=1:32:w1
for j=1:32:h1
a=i+31;
b=j+31;
F=fft2( I(i:a,j:b) );
factor=abs(F).^f;
block = abs(ifft2(F.*factor));
larv=max(block(:));
if larv==0
larv=1;
end;
block= block./larv;
inner(i:a,j:b) = block;
end;
end;
final=inner*255;
final=histeq(uint8(final));
end

error:

>> fftenhance
Not enough input arguments.

Error in fftenhance (line 3)
I = 255-double (image);

Answer 1

[Ameer Hamza]

You need to call the function fftenhance with an input image. For example

image = imread('pears.png'); % name of an image file
fftenhance(image, 2)

Save your function in a file named fftenhance.m, and then run the above two lines in command window.

[indrani dalui]

dear sir,

where am i put this line.actually i am a beginer.

[Ameer Hamza]

Indrani, create a file name fftenhance.m and save the following code in it.

%(Image Enhancement)
function [final] = fftenhance (image,f)
I = 255-double (image);
[w,h] = size(I);
%out = I;
w1=floor(w/32)*32;
h1=floor(h/32)*32;
inner = zeros(w1,h1);
for i=1:32:w1
for j=1:32:h1
a=i+31;
b=j+31;
F=fft2( I(i:a,j:b) );
factor=abs(F).^f;
block = abs(ifft2(F.*factor));
larv=max(block(:));
if larv==0
larv=1;
end;
block= block./larv;
inner(i:a,j:b) = block;
end;
end;
final=inner*255;
final=histeq(uint8(final));
end

Then close that file and run these lines in command window

image = imread('pears.png'); % name of an image file
fftenhance(image, 2)

[Rik]

If you do not know this basic interaction with Matlab you will greatly benefit from doing a tutorial. The Matlab OnRamp course provided for free is usually a good start.

[indrani dalui]

dear sir,

when run these lines in command window this message is shown

image = imread('pears.png'); % name of an image file

fftenhance(image, 2)

Undefined function or variable 'fftenhance'.

[Rik]

You need to make sure your function is on the Matlab path or in your current folder.

What does this line return as output?

clc,disp(pwd),which fftenhance -all

And what exact folder did you save the fftenhance.m file?