用户在没有 GUI 的情况下选择两个图像之一

Question

我有一个二进制图像 Bimg，我让用户在它和互补图像之间 select。我使用子图向用户展示了两张图片：

subplot(1,2,1);
imshow(Bimg);
subplot(1,2,2);
imshow(~Bimg);

我可以在不构建 GUI 的情况下接受用户的点击输入吗？我能以某种方式使用 ginput() 吗？

Answer 1

您可以简单地将回调函数绑定到图像对象的ButtonDownFcn。我们可以将此回调函数与 waitfor 结合起来，使它类似于一个对话框，供用户 select 两张图片之一。

function clicked = imgdlg(Bimg)
    hfig = dialog();
    hax1 = subplot(1,2,1, 'Parent', hfig);
    him1 = imshow(Bimg, 'Parent', hax1);
    title('Normal')

    hax2 = subplot(1,2,2, 'Parent', hfig);
    him2 = imshow(~Bimg, 'Parent', hax2);
    title('Complement')

    % Assign a tag to each of the images corresponding to what it is.
    % Also have "callback" execute when either image is clicked
    set([him1, him2], ...
        {'Tag'}, {'normal', 'complement'}, ...
        'ButtonDownFcn', @callback)

    drawnow

    % Wait for the UserData of the figure to change
    waitfor(hfig, 'Userdata');

    % Get the value assigned to the UserData of the figure
    clicked = get(hfig, 'Userdata');

    % Delete the figure
    delete(hfig);

    function callback(src, evnt)
        % Store the tag of the clicked object in the UserData of the figure
        set(gcbf, 'UserData', get(src, 'tag'))
    end
end

用户在没有 GUI 的情况下选择两个图像之一

user chooses one of two images without GUI

matlab

user-input

matlab-figure