How to set an image as background for plot and display it in existing GUI?

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Henning 2022-12-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1885902-how-to-set-an-image-as-background-for-plot-and-display-it-in-existing-gui

评论： Image Analyst 2022-12-30

In my application, on a click of a button a plot with an background image should be plotted and displayed in the same window. To do so, I create some UIAxes in my App:

app.UIAxes = uiaxes(app.GridLayout);
app.UIAxes.Layout.Row = 5;
app.UIAxes.Layout.Column = 3;

After the button is clicked I plot the diagram in the already existing (but empty) UIAxes:

plot(points(:,1), points(:,2), 'r.-', 'LineWidth', 2, 'Parent', app.UIAxes);

That works so far, but I am not able to put the image in the background. I know from a previous question, that I can display the picture and plot the points over it like this:

imshow(image);
hold on
axis('on', 'image')
plot(points(:,1), points(:,2), 'r.-', 'LineWidth', 2, 'MarkerSize', 30);

This soultion is great, because my plot is in the imagesize and everything fits. But this solution opens a new window and I want to render it into the current GUI. I also tried to use Image instead of UIAxes and set the Image with:

app.Image.ImageSource = image;

But then I don't know how to plot the graph in it.

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采纳的回答

Cameron 2022-12-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1885902-how-to-set-an-image-as-background-for-plot-and-display-it-in-existing-gui#answer_1138072

This link seems like what you're looking for.

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Henning 2022-12-29

actually not. I need to attach it to some existing UI component such as UIAxes or Image. In the solution of your link it always opens the image in a new window

Cameron 2022-12-30

在 MATLAB Online 中打开

Try this

img = 'thumbnail.jpg'; %your file name
I = imread(img); 
x = 0:0.1:7; %x vector
y = rand(length(x),1); %random y vector
hold(app.UIAxes,'on') %hold your uiaxes
%input your image. the [0 7] and [1 0] are taken from the x and y data.
%adjust as needed
image(app.UIAxes,[0 7],[1 0],I); 
plot(app.UIAxes,x,y,'-o') %plot
hold(app.UIAxes,'off')
axis(app.UIAxes,'tight')

You can adjust this as required.

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Image Analyst 2022-12-29

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1885902-how-to-set-an-image-as-background-for-plot-and-display-it-in-existing-gui#answer_1138082

在 MATLAB Online 中打开

Do you mean like this:

grayImage = imread('moon.tif');

[rows, columns, numberOfColorchannels] = size(grayImage)

rows = 537

columns = 358

numberOfColorchannels = 1

imshow(grayImage);

axis xy

x = 1 : columns;

period = 64;

y = 100 * sin(2 * pi * x / period) + rows/2;

hold on;

plot(x, y, 'r-', 'LineWidth', 2)

yline(rows/2, 'LineWidth', 2, 'Color', 'c')

axis('on')

Other demos are attached.

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Henning 2022-12-30

@Les Beckham That works perfect, thanks!

Image Analyst 2022-12-30

If this Answer solves your original question, then could you please click the "Accept this answer" link to award the answerer with "reputation points" for their efforts in helping you? They'd appreciate it. Thanks in advance. 🙂 Note: you can only accept one answer (so pick the best one) but you can click the "Vote" icon for as many Answers as you want. Voting for an answer will also award reputation points.

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