how to convert plot image into normal imge

i convert an image is boundary format but it can display plot format. i am using saveas command function only display in out side of matlab .i am using imshow does not show anything.please help me how to store image in matlab readable format.

and how can i get x,y coordinate values boundary B{k}

clear;
close all;
i1=imread('76.jpg');
i1=rgb2gray(i1);
i2=im2bw(i1,.4);
i2= wiener2(i2,[5 5]);
i2=imfill(i2,'holes');
%i2=~i2;
m=bwperim(i2);figure,imshow(m);
e=length(B);
labeledImage = bwlabel(i2, 8);
blobMeasurements = regionprops(labeledImage, i1, 'all'); 
imshow(i2)
hold on
set(gcf, 'Position', get(0, 'ScreenSize'));
for k = 1:e
  boundary = B{k};
 plot(boundary(:,2), boundary(:,1), 'g', 'LineWidth', 0.2)
end

%i get this plot format. please help how to convert into matlab readable format because i can not do next processing**

Answer 1

[Walter Roberson]

Perhaps you want to poly2roi() ?

[Walter Roberson]

[x,y] coordinate values for the boundary are already in B{k} for each k.

If you want the all together in one array, but without any indication of where any of the boundaries ends, use

vertcat(B{:})

Answer 2

[senthil kumar]

if true
  just save separate and the object.please help me
end

Answer 3

[Image Analyst]

You never defined B. It looks like it should have come from a call to bwboundaries(i2). See my tutorial for an example: http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial-blobsdemo