how to find centre of mass in each grid

help me to find centre of mass in each grid in a image

Answer 1

[Image Analyst]

Extract each grid into a small subimage, then sum up the x and y

[rows, columns] = find(~subImage);
meanRow = mean(rows);
meanColumn = mean(columns);

[Raghu Rao]

clc;
close all;
clear all;
a = imread('i2e.jpg');
figure;imshow(a);

% Normalizatoin

b = imresize(a,[50,50]);
figure;imshow(b);

% Binarization
th = graythresh(b);
a = im2bw(b,th);
s=0;
x=1;
z=1;
m=1;
w = 8;
h = 8;
c=50/w;
r=50/h;
figure,imshow(a);
a(r:c:end,:,:) = 0;
a(:,r:c:end,:) = 0;
figure,imshow(a);
cellA = cell(w ,h);
X=0;
Y=0;
tot=0;
for i=1:c
    for j=1:r
        i1=i+w;
        j1=j+h;
        if(i1<w+2&& j1<w+2)
            for k=i:i1
                for l=j:j1
                    s(k,l)=a(k,l);
                end
            end
            cellA{m}=s;
             m=m+1;
            for rw=1:1:r
                for cr=1:1:c
                    if(s(rw,cr)==0) 
                   X = X + rw;
                   Y = Y + cr;
                   tot=tot+1;
                    end
                end
            end    
        end
    end
end
X = X/tot;
Y = Y/tot;
j = impoint(gca,[Y,X]);
s
tot
X
Y

this is my code am getting center of mass for one grid but i want to find the center of mass for every grid on image

[Image Analyst]

You're confusing (x,y) with (row,column). X is column, not row. Also impoint takes x,y not y,x.

http://www.mathworks.com/matlabcentral/answers/13205#answer_18099

[Raghu Rao]

thank you image Analyst,

[Raghu Rao]

• after editing my code am not getting proper results i want to point center of mass in each grid on image.but am not getting the results. please help me.