Colormap Question for script requirements? - Homework

2013 11 18
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更新时间：2013 11 19
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I am trying to make two colormaps. Both will be using white and black colors only. It is a 50 x 50 matrix image where each element is randomly either white or black. However, the second image has the colors reversed (so all white is black and vice versa). This is my script I have.
subplot(1,2,1);
cm = [0 0 0;1 1 1];
colormap(cm);
mat = randi(2,50);
image(mat);
title('Yin');
subplot(1,2,2);
cm2 = [1 1 1;0 0 0];
colormap(cm2);
image(mat);
title('Yang');
The only problem is that I don't know where to have the second image switch colors from the first image???

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Image Analyst
Image Analyst 2013-11-18

1 个投票

Try this:
subplot(1,2,1);
matrix1 = uint8(randi(2,50) - 1);
imshow(matrix1, []);
title('Yin', 'FontSize', 50);
subplot(1,2,2);
matrix2 = 1 - matrix1;
imshow(matrix2, []);
title('Yang', 'FontSize', 50);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);

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Nora
Nora 2013-11-19
That works! Just curious though, how would I keep the x and y axis numbers/scale?
Nora
Nora 2013-11-19
What I mean is, is there a way to do the above using colormap?
I have this script but the second image isn't working.
subplot(1,2,1);
cm = [1 1 1; 0 0 0];
colormap(cm);
mat = randi(2,50);
image(mat);
title('Yin');
subplot(1,2,2);
cm2 = [1 1 1; 0 0 0];
colormap(cm2);
mat2 = mat - 1;
image(mat2);
title('Yang');

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