How to enlarge binary image background in output screen?

I am drawing 16 different radii circles over a binary image. I want visualize all circles that has been drawn over the image.

[Kevin Chng]

What do you mean visualize all circle here?

[Zara Khan]

yes yes

[Kevin Chng]

imshow('pic.png')

is this what you want?

[Zara Khan]

no that I have already but not able to visualize all circles See pic.png. larger circles are not visible

Answer 1

[KSSV]

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

[Zara Khan]

its working nice when have less no of circles. Not fullfilling my requirements. I am getting same ouput like pic.png

[Image Analyst]

Clear as mud. Is it working nicely or not? Are you getting the output picture like you want or not? What are your requirements? As far as we know, you want an output like pic.png, and you're getting that.

Sorry but only Walter has the Mind Reading Toolbox. The rest of us would need you to clearly state what you have and what you want.

[Zara Khan]

Circles with larger diameters are not fitting into the ouput window. I want all the circles to completely visualize. NOT LIKE pic.png. IN pic.png SOME PORTION OF LARGER DIAMETER CIRCLES HAS BEEN CROPPED.

[Zara Khan]

Padding with back ground pixels possible so that can visualize all diameter circles ??????

[KSSV]

use imresize and increase the dimensions of your image.

Answer 2

[Image Analyst]

Assuming you have the circles and just need to visualize them, use viscircles().

Answer 3

[Image Analyst]

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().