MATLAB: Simplest adaptive thresholding custom code

Question

Hi all,

I got this far with the adaptive thresholding, Can a professional explain my errors please?

i am trying to do an adaptive thresholding via (Custom For Loop)manual coding!!

I am not sure if this can work! need a break down of what should happen please!!

Thanks in advance!!

function adthres;

[row col]=size(x);

for i=1:1:n

for j=1:n

x = i – n/2;

y = j – n/2;

j(i,j) = exp(-(x*x)/two_sigma_sq);

end

end

end

Answer 1

adaptive thresholding menas, the threshold value is not fixed, its depends on image or input data

In the first view, This code is messed. As you defined j=1:n, here j is scalar, also j(i,j)>> Here j >> representing vector. I didnot find any statement, which relate to calculate the threshold value or replacing vector elements based the threshold.

some_vector(i,j)=exp(-(x*x)/two_sigma_sq);

This statement finding the each element of 2D vector/matrix