Question

我正在编程GUI，用于选择图像中的感兴趣区域（ROI）。可以使用内置MATLAB函数选择几种区域，例如impoly / imellipse。

下面，我提供了一个GUI的最小工作示例，可以解决我的问题。

问题是：假设一个用户错误地点击其中一个ROI选择按钮（即，当目标是选择多边形时选择选择椭圆）如何取消ROI选择的交互式工具避免工作区中的错误？

我知道按下“Esc”键会取消交互式工具，但我希望避免错误。

一个想法是使用另一个按钮（Abort）来执行中断，但我无法提供代码来执行此操作。

function roiData = testGUI(sourceImage)

% Initialize main figure
hdl.mainfig = figure();

% Initialize roiData and roiCounter
roiData    = [];
roiCounter = 0;

% Select Elliptical ROI button
hdl.selectEllipseButton = uicontrol(hdl.mainfig, 'Units', 'normalized', 'Position',[0.05 0.7 0.2 0.1], 'String', 'Select Ellipse', 'Callback', @selectEllipse);
% Select Polygonal ROI button
hdl.selectPolygonButton = uicontrol(hdl.mainfig, 'Units', 'normalized', 'Position',[0.05 0.6 0.2 0.1], 'String', 'Select Polygon', 'Callback', @selectPolygon);
% Abort Button
hdl.abort = uicontrol(hdl.mainfig, 'Units', 'normalized', 'Position',[0.05 0.2 0.2 0.2], 'String', 'Abort', 'Callback', @abort);
% Axes
hdl.axes = axes('Parent',hdl.mainfig, 'Units', 'Normalized', 'Position', [0.35 0.2 0.6 0.6]);


    function selectEllipse(~, ~, ~)
        imshow(sourceImage, [], 'Parent', hdl.axes);
        roiCounter = roiCounter + 1;
        h = imellipse(hdl.axes);
        mask = uint16(createMask(h));
        wait(h);            
        roiData(roiCounter).mask = mask;
    end

    function selectPolygon(~, ~, ~)
        imshow(sourceImage, [], 'Parent', hdl.axes);
        roiCounter = roiCounter + 1;
        h = impoly(hdl.axes);
        mask = uint16(createMask(h));
        wait(h);
        roiData(roiCounter).mask = mask;
    end

    function abort(~, ~, ~)
        cla(hdl.axes)
        % I need something else here... (see above)
    end

% Pause until figure is closed
waitfor(hdl.mainfig);

end

Answer 1

试试这个：

function roiData = testGUI(sourceImage)
% Initialize main figure
hdl.mainfig = figure();

% Initialize roiData and roiCounter
roiData    = [];
roiCounter = 0;

% Select Elliptical ROI button
hdl.selectEllipseButton = uicontrol(hdl.mainfig, 'Units', 'normalized', 'Position',[0.05 0.7 0.2 0.1], 'String', 'Select Ellipse', 'Callback', @selectEllipse);
% Select Polygonal ROI button
hdl.selectPolygonButton = uicontrol(hdl.mainfig, 'Units', 'normalized', 'Position',[0.05 0.6 0.2 0.1], 'String', 'Select Polygon', 'Callback', @selectPolygon);
% Abort Button
hdl.abort = uicontrol(hdl.mainfig, 'Units', 'normalized', 'Position',[0.05 0.2 0.2 0.2], 'String', 'Abort', 'Callback', @abort);
% Axes
hdl.axes = axes('Parent',hdl.mainfig, 'Units', 'Normalized', 'Position', [0.35 0.2 0.6 0.6]);

% Callbackrunning parameter
callbackrunning = false;

    function selectEllipse(hObject,eventdata)   
        if(callbackrunning)
            return;
        end

        callbackrunning = true;

        imshow(sourceImage, [], 'Parent', hdl.axes);
        roiCounter = roiCounter + 1;
        h = imellipse(hdl.axes);
        if(~callbackrunning)
            return;
        end
        mask = uint16(createMask(h));
        roiData(roiCounter).mask = mask;

        callbackrunning = false;
    end

    function selectPolygon(hObject,eventdata)   
        if(callbackrunning)
            return;
        end

        callbackrunning = true;

        imshow(sourceImage, [], 'Parent', hdl.axes);
        roiCounter = roiCounter + 1;
        h = impoly(hdl.axes);
        if(~callbackrunning)
            return;
        end
        mask = uint16(createMask(h));
        roiData(roiCounter).mask = mask;

        callbackrunning = false;
    end

    function abort(hObject,eventdata)   
        if(callbackrunning)
            disp('Fire escape key to cancel previous imrect');
            % Create robot that fires an escape key
            robot = java.awt.Robot;
            robot.keyPress    (java.awt.event.KeyEvent.VK_ESCAPE);
            robot.keyRelease  (java.awt.event.KeyEvent.VK_ESCAPE);   
            callbackrunning = false;
        end
    end

% Pause until figure is closed
waitfor(hdl.mainfig);
end

机器人对象触发取消直接的转义键。

在GUI中中断/禁用ROI绘图功能

1 个答案: