how to separate each layer of concentric circular strip of different color?

Question

ajeet verma 2017-3-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/328905-how-to-separate-each-layer-of-concentric-circular-strip-of-different-color

评论： ajeet verma 2017-3-9

i have a code for concentric circular strip and i want to separate each layer so how to do? code is given below.

 X = ones(256,1)*[-128:127]; Y = [-128:127]'*ones(1,256); 
Z = X.^2 + Y.^2; 
% mesh(Z); 
image = zeros(256,256); 
image(find(Z<= 60^2)) = 0.3;
image(find(Z<= 40^2)) = 0.5;
image(find(Z<= 20^2)) = 0.8;
imshow(image);

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Answer 1

KSSV 2017-3-9

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/328905-how-to-separate-each-layer-of-concentric-circular-strip-of-different-color#answer_257977

在 MATLAB Online 中打开

X = ones(256,1)*[-128:127];
Y = [-128:127]'*ones(1,256);
Z = X.^2 + Y.^2;
% mesh(Z);
image = zeros(256,256);
image(find(Z<= 60^2)) = 0.3;
image(find(Z<= 40^2)) = 0.5;
image(find(Z<= 20^2)) = 0.8;
subplot(221)
imshow(image);
%%pick between 0.3 and 0.5
Zi = image ;
Zi(image~=0.3) = 255;
subplot(222)
imshow(Zi)
Zi = image ;
Zi(image~=0.5) = 255 ;
subplot(223)
imshow(Zi)
Zi = image ;
Zi(image~=0.8) = 255 ;
subplot(224)
imshow(Zi)