finding skew angle of license plate

following is the bit of code for finding skew angle in horizontal direction.. Can someone please explain ?

for i=-44:44
    m=tan(i*pi/180);
     for j=-r+1:r-1
         for k=-c+1:c-1
             if (round((m*(k))+j+r+r)<=0)
                 v=1;
             elseif(round((m*(k))+j+r+r)>2*r-1)
                     u=1;
              else

                    q=w(round((m*(k))+j+r+r),k+c);
                z(j+r,i+45)=z(j+r,i+45)+ double(q);
            end
        end 
    end 
  end

[Ashish Uthama]

Omikar, I formatted the code for you. (Please consider using the the '{} code' button in your next question to make it readable)

[mahiuddin kamal]

how to find theta?