imhist & suppress color bar

Question

Richard 2020-9-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/592111-imhist-suppress-color-bar

评论： Ameer Hamza 2020-9-11

Quick question: I am trying to overlay 2+ image histograms, using imhist (as it provides the color bar at the bottom). When I try to make more than one, using hold on, it adds extra color bars to the bottom. Is there a way to supress that output (or is there a better option I am unaware of)? Idealy the output should look like the output of the code below but with only 1 color bar.

Quick example of what's happening:

I = imread('moon.tif');
I1 = I(100:120,210:230);
I2 = I(450:470,170:190);
I3 = I(370:390,60:80);
figure
hold on
imhist(I1);
imhist(I2);
imhist(I3);
hold off

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Answer 1

Ameer Hamza 2020-9-11

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/592111-imhist-suppress-color-bar#answer_493045

编辑：Ameer Hamza 2020-9-11

在 MATLAB Online 中打开

Try this

I = imread('moon.tif');
I1 = I(100:120,210:230);
I2 = I(450:470,170:190);
I3 = I(370:390,60:80);
f = figure;
ax = axes();
hold on
imhist(I1);
pos = ax.Position; % save the axes position because next commands will resize it
imhist(I2);
imhist(I3);
hold off
stripes = findall(f, 'Tag', 'colorstripe');
delete(stripes(1:end-1))
ax.Position = pos;