how to save the image

I have the folowing code ,plz tell how to save the circled image

k is my image

function [x1 y1 r ] = circle_saptha4(k)

ok = 0;
nim = k;
while ok~=1
  % figure;
    imshow(nim);
  pt = ginput(2)

    x1 = pt(1,1);
    y1 = pt(1,2);
    x2 = pt(2,1);
    y2 = pt(2,2);
    xpt = [x1 x2];
    ypt = [y1 y2];
    %line(x,y); % Enablw this for draw rectangle on circle

    r = sqrt((x2-x1)^2 + (y2-y1)^2)

    pp=rsmak('circle',r,[x1 y1]);
    % figure;
    % imshow(k)
    fnplt(pp);
    line(xpt,ypt);

    xtl = x1-r;
    xtr = x1+r;
    xbl = x1-r;
    xbr = x1+r;

    ytl = y1+r;
    ytr = y1+r;
    ybl = y1-r;
    ybr = y1-r;

    x = [xtl xtr xbr xbl xtl];
    y = [ytl ytr ybr ybl ytl];
    %line(x,y);

    for i=1:size(k,1)
        for j=1:size(k,2)
            x2 = j;
            y2 = i;
            val = floor(sqrt((x2-x1)^2 + (y2-y1)^2));
            if(val == floor(r))
                nim(i,j,1) = 255;
                nim(i,j,2) = 0;
                nim(i,j,3) = 0;

%             else
%                 nim(i,j,1) = k(i,j,1);
%                 nim(i,j,2) = k(i,j,2);
%                 nim(i,j,3) = k(i,j,3);
%             end
      end
      end

    ok = (menu('Do u want to draw another circle?','No','Yes')==1)

%     hold on
  end
end

Answer 1

Why not use rectangle() to draw the circles into the overlay, then use export_fig (from the File Exchange) to save the image with the circles written into the image?

Answer 2

 imwrite(nim, 'newimage.png');

i did it but it writes only 255

Are you saying that the entire output image consists of (255,255,255) RGB triples ?

What is being passed in for "k" ?

k is my image. k is peppers.png

You didn't answer my first question

Are you saying that the entire output image consists of (255,255,255) RGB triples ?

Also I notice that your outputs are x1, y1, r, but not nim, and that you do not display nim ?

i have imshow(nim) so image is displayed ,by calling this function,i dont know what u mean by RGB triples

Why do you change nim after you display it?

Why do you return x1 y1 only for the newest circle, instead of for all circles? You never even displayed that newest circle on the drawing.

What is your reason for saying "I did it but it writes only 256" ? What writes only 256 ?

Answer 3

wanna know how to how to save images to different formats in c#

check here http://www.rasteredge.com/how-to/csharp-imaging/imaging-saving-printing/