How do I make my circle display in pink and background in white color?

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marsmar
marsmar 2022-11-28
评论： KSSV 2022-11-28
Ran in:
This is my code at the moment. I'm trying to generate a circle in a 500x500 pixel spectrum with a fixed radius. I want to export all the circles created as images. I don't know how to make my circle display in pink or the background to be in white.
%parameteres
shape = [500 500]; % [y x]
shapecolor = [1 0.3 0.5];
backgroundcolor = [100 100 100];
% set up some things
numimges = 1;
archive = 'circulorosa';
nameofdatabase = 'cuadrado';
for k = 1:numberimages
radius = 5;
center = (shape-2*r-1).*rand(1,2)+1+r; % (y,x);
viscircles(center,r,'Color','b');
axis square;
end
Unrecognized function or variable 'numberimages'.

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KSSV
KSSV 2022-11-28
Ran in:
[m,n] = deal(500) ; % side of image
I = ones(m,n,3) ; % initialize image with white background
% GEt cirlce on the image
[X,Y] = meshgrid(1:n,1:m) ;
C = [mean(X(:)) mean(Y(:))] ;
th = linspace(0,2*pi)' ;
R = 5 ;
x = C(1)+R*cos(th) ;
y = C(2)+R*sin(th) ;
idx = knnsearch([X(:) Y(:)],[x y]) ;
% Give pink color to circle pixels on image
c = [255,192,203]/255; % pick RGB color ocde
for i = 1:3
T = I(:,:,i) ;
T(idx) = c(i) ;
I(:,:,i) = T ;
end
imshow(I)
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marsmar
marsmar 2022-11-28
Thank you! If i wanted to change the angle or the central postion where the circle is at? How could I do that? Or what functions?

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更多回答（1 个）

Image Analyst
Image Analyst 2022-11-28
You never assigned numberimages, only numimges which is spelled differently. Try
numberimages = 20; % Or whatever you want.

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