Not enough input argument

function u =Blur_removal(f,A,mu,lambda,Niter,typeKernel)


% This function performs the minimization of
% u=arg min |D_x u|_1+|D_y u|_1+0.5*mu*||A°u-f||_2^2
%
% by Split Bregman Iteration
%
% f = blurry image

% A = convolution kernel

% mu = regularization parameter

% lambda = fidelity factor for the split variables

% Niter = maximum number of iterations

% typeKernel: 0 <=> A is considered in the spatial domain
%             1 <=> A is considered in the Fourier domain and must be of
%             the same size of the image with frequency (0,0) at location
%             (1,1)


[M,N]=size(f);

%Structures and constants initialization

f=double(f);

dx=zeros(M,N);

dy=zeros(M,N);

bx=zeros(M,N);

by=zeros(M,N);

u=f;

Z=zeros(M,N);

K=0;

%Fourier mask + initialization of Fourier constant quantities

if typeKernel==0
    
    Mask=zeros(M,N);
    
    [H,L]=size(A);
    
    Mask([end+1-floor(H/2):end,1:ceil(H/2)],[end+1-floor(L/2):end,1:ceil(L/2)]) = A;
    
    FMask=fft2(Mask);
    
else
    
    FMask = A;
    
end

%Fourier Laplacian mask initialization

D = zeros(M,N);

D([end,1,2],[end,1,2]) = [0,1,0;1,-4,1;0,1,0];

FD=fft2(D);

%Fourier constant initialization

FW=((mu/lambda)*abs(FMask).^2-real(FD)).^-1;

FF=(mu/lambda)*conj(FMask).*fft2(f);


%Bregman iterations

err=norm(f(:),2);

tol=1e-3*err;

while ((err>tol) && (K<Niter)),
    
    K=K+1;
    
    tx=dx-bx;
    
    ty=dy-by;

    up=u;
    
    %Update u
    u=real(ifft2(FW.*(FF-fft2(tx-tx(:,[1,1:N-1])+ty-ty([1,1:M-1],:)))));
    
    ux=u-u(:,[1,1:N-1]);
    uy=u-u([1,1:M-1],:);

    % dx    
    
    tmpx=ux+bx;
    dx=sign(tmpx).*max(Z,abs(tmpx)-1/lambda);

    % dy
    
    tmpy=uy+by;
    dy=sign(tmpy).*max(Z,abs(tmpy)-1/lambda);

    % bx & by    
    
    bx=tmpx-dx;
    by=tmpy-dy;
    
    err=sum(sum((up-u).^2));
end

Answer 1

[KSSV]

Don't run the code staright away using run/ f5/ green button. You need to provide the input variables and then call the function.

f = your input ;
A = 
mu = 
lambda = 
Niter = 
typeKernel = 
u =Blur_removal(f,A,mu,lambda,Niter,typeKernel) ;

Define the above values and then call the function. The function has help, please read it.