Not enough input arguments.

THIS ERROR APPEARS : Error using Quant_gray (line 3) --> if I(i,j)~= fmax; %I(i,j) not equal to fmax Not enough input arguments.

[Image Analyst]

What does this say

>> which -all I

[oumi k]

I think the problem was with running the function script instead of the main script itself

Answer 1

[yanqi liu]

clc; clear all; close all;
I=imread('football.jpg');
if ndims(I)==3
    I = rgb2gray(I);
end
imshow(I);

N=16; %niveau de quantification change to 4,8,16...128
[L,W]= size(I);
fmin=min(min(I)); % for 2D matrix of data (vector utilisation)
fmax=max(max(I));
q=(fmax-fmin)/N; % pas de quantification
for i=1:L
    for j=1:W
        [quant]=Quant_gray(I,N,q,fmax,fmin,i,j);
        I(i,j)=quant;        
    end
end
% figure; imshow(I, []);
function [quant] = Quant_gray( I,N,q,fmax,fmin,i,j )
if I(i,j)~= fmax %I(i,j) not equal to fmax
    quant= [I(i,j)*(fmax-fmin)/q]/N-1;
    quant= floor(quant);
else
    quant=N-1; % I(i,j)=fmax
end
end

[oumi k]

Thank you for your answer. The problem was that I was running the function alone from the function script instead of the main script page itself.