how to use a for loop to find all row ?!

Hello, Please Help me?

I want to find the lenght of index <1 = black color in the picture name 'bwcircle_crop'

but now, I write the code for thr first row but I dont know to use for loop to find the same way in all row.

Thank you ^^

Answer 1

[KSSV]

I = imread('crack_crop.jpeg') ;
I = rgb2gray(I) ;
[y,x] = find(I==0) ;
imshow(I)
hold on
plot(x,y,'.r')

%% GEt bounding box
x0 = min(x) ; x1 = max(x) ;
y0 = min(y) ; y1 = max(y) ;
%
B = x1-x0 ;
L = y1-y0 ;
R = [x0 y0 ; x0 y1 ; x1 y1 ; x1 y0] ;
% patch(R(:,1),R(:,2),'b')

if L>B
    title('Vertical Crack')
else
    title('Horizonatal Crack')
end

[Ajaree Rattanaharn]

@KSSV This amazing!

Thank you

If I want to more difficult to specific the crack.

I try to, but I think I wrong with lenght x and y

If you have any idea :)

[KSSV]

Dont post code as image nippet....s

i would like to know what is your expectation.

[Ajaree Rattanaharn]

if possible, I want to specific the crack.

as the image above, it's a vertical break .

[KSSV]

Edited the code.

[Ajaree Rattanaharn]

@KSSV

Thank You very much

I'm done.^^