error in if cicle due to grayscale images and binary images

im trying to calculate porosity throgh a funtion (bellow), either from a binary image or a grayscale image in one pusch button, but the grayscale image is not able to calculate, it just give another value, incorrect. the binary works fine. a = handles.grey; b = handles.imgData; B = im2double(b); A = im2double(a); I = handles.binaria;

[r c d]=size(a)

if d == 0 % black pixels c = sum(sum(A == 0));

textLabel2 = sprintf('%d', c); set(handles.areaporos, 'String', textLabel2);

% total pixels numPixels = numel(B); textLabel = sprintf('%d', numPixels); set(handles.areatotal, 'String', textLabel);

%porosidade P = ((c/numPixels)*100); textLabe4 = sprintf('%d', P); set(handles.porosidade, 'String', textLabe4);

else

h = sum(sum(I == 0)); textLabel5 = sprintf('%d', h); set(handles.areaporos, 'String', textLabel5);

numPixels = numel(B); textLabel = sprintf('%d', numPixels); set(handles.areatotal, 'String', textLabel);

H = ((h/numPixels)*100); textLabe6 = sprintf('%d', H); set(handles.porosidade, 'String', textLabe6); end end

[Rik]

Your code is unreadable, you give no example data, you don't say what the output should be. Have a read here and here. It will greatly improve your chances of getting an answer.