I want each object space

Help me please.

img=rgb2gray(imread('E:\image\nok.jpg'));
subplot(3,3,1),imshow(img);

buf2=imadjust(img,[0.2 0.8],[0 1],0.8);
subplot(3,3,2),imshow(buf2);title('Gray-level tranform');

oup=medfilt2(buf2);
disp=mat2gray(oup);

%threshold=graythresh(img);
[junk threshold]=edge(disp,'sobel');
fudgeFactor=.5;
BWs=edge(img,'sobel',threshold*fudgeFactor);
subplot(3,3,3),imshow(BWs);

se90=strel('line',9,90);
se0=strel('line',9,0);
BWsdil=imdilate(BWs,[se90 se0]);
subplot(3,3,4),imshow(BWsdil);

BWdfill=imfill(BWsdil,'holes');
subplot(3,3,5),imshow(BWdfill);

BWnobord=imclearborder(BWdfill,4);
subplot(3,3,6),imshow(BWnobord);

bw=bwareaopen(BWnobord,200);
se=strel('disk',9);
bw=imopen(bw,se);
%bw=imfill(bw,'holes');
subplot(3,3,7),imshow(bw);title('Open');

[B,L] = bwboundaries(bw,'noholes');
subplot(3,3,8),imshow(label2rgb(L,@jet,[.5 .5 .5]));
hold on;
for k = 1 :length(B)
    boundary = B{k};
    plot(boundary(:,2),boundary(:,1),'w','LineWidth',2)
end

Answer 1

[Walter Roberson]

Once you have the objects labeled, use regionprops('Area') on the label matrix.

Answer 2

[Image Analyst]

I don't know what you mean by object space. If you want the area of each region, you can look at my Image Segmentation Tutorial where it goes over that in well commented detail. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

In short

measurements = regionprops(bw, 'Area');
allAreas = [measurements.Area]; % Get all areas into an array
[sortedAreas, sortOrder] = sort(allAreas, 'descend'); % Option, if you want to sort them.