Display original and processed image simultaneously in different UIAxes in App Designer

Question

Beth Carreon 2022-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/1703825-display-original-and-processed-image-simultaneously-in-different-uiaxes-in-app-designer

评论： Beth Carreon 2022-4-25

Is it possible to display the original image and processed image in GUI simultaneously? I have this code below and the result is that the images appear alternately. And the code stops after 1 image.

filePattern = fullfile(app.myFolder, '*.JPG'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, baseFileName);
    % Now do whatever you want with this file name,
    % such as reading it in as an image array with imread()
    OrigImage = imread(fullFileName);
    imshow(OrigImage, 'Parent', app.UIAxes);  % Display image.
    drawnow; % Force display to update immediately.
    pause(1);
    while k >= 1
        a = rgb2gray(OrigImage);
        imshow(a, 'Parent', app.UIAxes_2);
        drawnow; % Force display to update immediately.
        pause(1);
    end
end

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Answer 1

DGM 2022-4-24

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编辑：DGM 2022-4-24

在 MATLAB Online 中打开

The images appear alternately because that's what the code plainly does. It shows one image, waits, shows another.

It doesn't stop after one image. It gets stuck in an infinite loop. There is no reason for this to be in a while loop, so just remove the loop.

while k >= 1
    a = rgb2gray(OrigImage);
    imshow(a, 'Parent', app.UIAxes_2);
    drawnow; % Force display to update immediately.
    pause(1);
end