Image Transparency in AppDesigner

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Maximilian Orman-Kollmar 2021-11-17

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https://ww2.mathworks.cn/matlabcentral/answers/1589284-image-transparency-in-appdesigner

评论： Yongjian Feng 2021-11-18

I am building a GUI in AppDesigner, and in the static layout I have a few images. I have successfully been able to bring the gray image behind the bluer backgrouond, but I have not been able to change the transparency of the "foreground" image to show that the gray is behind it. All the tutorials I have foudn so far have been for changing transparency for image outputs, not static parts of the GUI. I would appreciate any and all help- thank you!

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DGM 2021-11-18

编辑：DGM 2021-11-18

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I'm just going to assume you're trying to do this composition strictly via graphics object properties instead of the raster data. Since AppDesigner is completely unusable in my environment, I'm just going to assume that something analagous works:

A = imread('peppers.png');

B = imread('cameraman.tif');

imshow(A); hold on % display BG image

hfg = imshow(B); % display FG image

hfg.AlphaData = 0.5; % set scalar alpha

Note that when you set the alpha of the BG layer, you'll be blending with the figure background.

That said, you're talking about putting the "background" sand image on top of the "foreground" projectile/probe/thing. Is that really what you want? The matting in the foreground image isn't uniform and will remain noticeable regardless of layer ordering. If these images don't need to be programatically rearranged in use, it would be simpler to just throw this in an image manipulation program and make a single image -- or to at least tidy up the FG image to aid in compositing.

Maximilian Orman-Kollmar 2021-11-18