How to enlarge binary image background in output screen?

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I am drawing 16 different radii circles over a binary image. I want visualize all circles that has been drawn over the image.
  4 Comments
Kevin Chng
Kevin Chng on 4 Dec 2018
Edited: Kevin Chng on 4 Dec 2018
imshow('pic.png')
is this what you want?
Zara Khan
Zara Khan on 4 Dec 2018
no that I have already but not able to visualize all circles See pic.png. larger circles are not visible

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Answers (3)

KSSV
KSSV on 4 Dec 2018
I = imread('P1_G4_9.png') ;
imshow(I)
[nx,ny] = size(I) ;
[X,Y] = meshgrid(1:ny,1:nx) ;
C = [mean(X(:)) mean(Y(:))] ;
R = 1:10:100 ;
th = linspace(0,2*pi) ;
x = cos(th) ; y = sin(th) ;
hold on
for i = 1:length(R)
plot(C(1)+R(i)*x,C(2)+R(i)*sin(th),'r')
end
  5 Comments
Zara Khan
Zara Khan on 4 Dec 2018
Padding with back ground pixels possible so that can visualize all diameter circles ??????
KSSV
KSSV on 4 Dec 2018
use imresize and increase the dimensions of your image.

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Image Analyst
Image Analyst on 4 Dec 2018
Assuming you have the circles and just need to visualize them, use viscircles().

Image Analyst
Image Analyst on 4 Dec 2018
If you want all the circles you have to, for some reason, extend beyond the image, you're going to have to enlarge the image with padarray(), NOT imresize().

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