Plot pixels from 2D boolean array

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Radhika Kulkarni
Radhika Kulkarni el 30 de Nov. de 2019
Respondida: Radhika Kulkarni el 2 de Dic. de 2019
I have a 2D boolean array stored 0s and 1s where I want to plot a red pixel. For example, If the 2D boolean array has 1 for (20, 20) location, it should plot a red pixel at that location. Else, it is has 0, it should not plot the red pixel.
Can someone help me?

Respuesta aceptada

Stephan
Stephan el 30 de Nov. de 2019
% your array
A = randi(2,101)-1;
% the result;
R=255*ones(101);
G=255*(-A+1);
B=255*(-A+1);
res = cat(3,R,G,B);
% plot result
imshow(res)
  4 comentarios
Radhika Kulkarni
Radhika Kulkarni el 30 de Nov. de 2019
Editada: Radhika Kulkarni el 30 de Nov. de 2019
Great! It worked.
Now, It is plotting my image from the array. I need to rotate the axes by 135 deg CCW. How do I do that?
See the attachment. I need to rotate this by 135 deg CCW.
Stephan
Stephan el 30 de Nov. de 2019
Editada: Stephan el 30 de Nov. de 2019
If you have Image Processing Toolbox use imrotate. If not see FEX to download a tool.

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Más respuestas (2)

Radhika Kulkarni
Radhika Kulkarni el 30 de Nov. de 2019
One more thing, I need to put this in a some time refresh loop, so it grows in size and back to normal size. Like pumping heart.
  1 comentario
Stephan
Stephan el 30 de Nov. de 2019
On File Exchange there are also tools to create gif animations. Maybe you want to use this.

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Radhika Kulkarni
Radhika Kulkarni el 2 de Dic. de 2019
How can I also show the x & y axis and ticks and axis data points to plot along with this vectorized code?

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