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were to introduce hold on command

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FIR
FIR el 10 de En. de 2013
I have a image in which i have to draw a circle over it,i have to draw circles in many places in the image ,please tell how to procees,i saw a code in matlab central it draws only one circle ,but how to draw many circles on a image manually ,i have to click on image and have to draw circle
http://www.mathworks.com/matlabcentral/fileexchange/23121-circle-on-image
i edited from above link but the thing is that i have to draw many circle on one image ,please tell where i have to write hold on command
code
where k is my image
function [] = circle_saptha(k)
ok = 0;
while ok~=1
% figure;
imshow(k);
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
imshow(nim);
ok = (menu('Do u want to draw another circle?','No','Yes')==1)
imshow(nim);
end
end

Respuesta aceptada

Teja Muppirala
Teja Muppirala el 11 de En. de 2013
You keep overwriting "nim" with the same original "k". You can fix it easily:
Step 1. Change these lines:
ok = 0;
while ok~=1
% figure;
imshow(k);
to this:
ok = 0;
nim = k;
while ok~=1
% figure;
imshow(nim);
Step 2. Delete these three lines:
nim(i,j,1) = k(i,j,1);
nim(i,j,2) = k(i,j,2);
nim(i,j,3) = k(i,j,3);
  2 comentarios
FIR
FIR el 11 de En. de 2013
same error
Teja Muppirala
Teja Muppirala el 11 de En. de 2013
Are you sure? Run this:
k = imread('peppers.png');
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)
%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
end
end
end
imshow(nim); ok = (menu('Do u want to draw another circle?','No','Yes')==1)
imshow(nim);
end

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Más respuestas (1)

Jan
Jan el 10 de En. de 2013
Editada: Jan el 10 de En. de 2013
A simplified version:
while ok~=1
imshow(k);
nim = <modified k>
imshow(nim);
ok = (menu('Do u want to draw another circle?','No','Yes') == 1);
imshow(nim);
end
Now nim is overwritten each time based on k. Perhaps you want:
nim = k;
while ok~=1
nim = <modified nim>
imshow(nim);
ok = (menu('Do u want to draw another circle?','No','Yes') == 1);
end
  4 comentarios
FIR
FIR el 11 de En. de 2013
The code above draws circle on imagaes one by one,i want to draw many circles on same image
Jan
Jan el 11 de En. de 2013
Then you should not insert the values of "k" in each iteration, but keep the values of "nim".

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