How to insert text below the images in matlab.

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Karthik K 2020-5-6

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https://ww2.mathworks.cn/matlabcentral/answers/523476-how-to-insert-text-below-the-images-in-matlab

编辑： DGM 2023-1-14

I want text to be displayed below the image (in figure window) as shown with colors. How can this be done. Anyone can help me out in this.??

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Answer 1

Ameer Hamza 2020-5-6

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https://ww2.mathworks.cn/matlabcentral/answers/523476-how-to-insert-text-below-the-images-in-matlab#answer_430741

编辑：Ameer Hamza 2020-5-6

在 MATLAB Online 中打开

Try this

im = imread('peppers.png');
imshow(im);
annotation('textbox', [0.13 0.08 0.8 0.1], ...
    'String', 'What: This is an image containing oranges', ...
    'Color', [1 0.5 0], ...
    'FontWeight', 'bold', ...
    'EdgeColor', 'none')
annotation('textbox', [0.13 0.03 0.8 0.1], ...
    'String', 'Benefit: Good for health', ...
    'Color', [0 0.5 0], ...
    'FontWeight', 'bold', ...
    'EdgeColor', 'none')

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Gülsüm 2023-1-14

thanks. then, how can i change the size and location the image in this case?

DGM 2023-1-14

编辑：DGM 2023-1-14

在 MATLAB Online 中打开

You can set the axes 'position' property to move the axes within the figure. If there are other images/objects in the same axes, you can set the 'xdata' and 'ydata' properties of the image object (im) to adjust the displayed extents of the image within the axes coordinate space.

im = imread('peppers.png');

imshow(im);

str1 = 'is an image? ';

str2 = 'miserable little pile of peppers!';

annotation('textbox', [0.13 0.08 0.8 0.1], ...

'String', ['What: ' str1], ...

'Color', [1 0.5 0], ...

'FontWeight', 'bold', ...

'EdgeColor', 'none')

annotation('textbox', [0.13 0.03 0.8 0.1], ...

'String', ['A: ' str2], ...

'Color', [0 0.5 0], ...

'FontWeight', 'bold', ...

'EdgeColor', 'none')

% make the image smaller and move it northeast

axscale = 0.5; % axes scale (normalized)

os = [0.1 0.1]; % axes offset [x y] (normalized)

hax = gca;

sc = 0.5*(1-axscale)*[1 1];

set(hax,'position',[sc+os 1-2*sc])

Bear in mind that the annotations are located in figure coordinates. They aren't positioned relative to the image itself. In this example, the axes position is relative to the figure, so even though the height and width in the 'position' property of the axes are equal, the axes is only square if the figure is square. Also note that the image does not necessarily have the aspect ratio necessary to fill the axes.

All of this adds up to mean that you're going to have to deal with a lot of coordinate wrangling if you want your annotations to always appear neatly next to an image without there being big gaps or overlaps as the image aspect ratio changes.

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