implement the distance transform algorithm by City-Block distance measurement

Hi Guys I have an assignment to implement the distance transform algorithm by City-Block distance measurement I tried a lot of solutions but it didn't work (That's the photo)

[Abdelrahman Talaat]

cic?

[killerabd]

ah ya3m enta bt3ml eh hna

Answer 1

[Walter Roberson]

City block transform between rows of P1 and corresponding rows of P2 is

CB = @(P1, P2) sum(abs(double(P1)-double(P2)), 2)

Answer 2

[Image Analyst]

I don't know if you want the distances between the centroids of the blobs

props = regionprops(mask, 'Centroid');
xy = vertcat(props.Centroid);

or between all the white pixels in the image.

[y, x] = find(mask);
xy = [x(:), y(:)];

But you can use pdist2

distances = pdist2(xy, xy, 'CityBlock');