我使用GUIDE构建MATLAB GUI来处理医学图像(MRI扫描时的脑肿瘤分割)。作为预处理步骤,程序会对不同的扫描进行核心处理,如下所示:
我现在想要在两个图像上显示十字准线作为核心注册的目视检查。十字准线应该彼此链接,使得它们指向两个图像中的相同像素。此外,它应该在悬停(或点击)其中一个图像时移动。这就是我想要实现的目标:
是否存在可以实现此目的的内置MATLAB函数?或者,如果我必须自己编写,那么如何处理这个问题呢?
答案 0 :(得分:1)
我将使用玩具GUI来展示它的工作原理:
让我们首先尝试让它仅适用于第一张图片。你想要达到的目标是:
您想先确定一些细节:
hold on
个来电之后添加对imshow
的来电,否则横线会删除您的图片而不是覆盖在其上。在您的GUI开启功能(此处为SuperDuperGUI_OpeningFcn
)中,您想要添加一个电话:
set(gcf, 'WindowButtonDownFcn', @getMousePositionOnImage);
每次用户在GUI中单击时,这将触发函数getMousePositionOnImage
。
然后,您要添加并实现函数getMousePositionOnImage
:
function getMousePositionOnImage(src, event)
% Fetch the current handles structure
handles = guidata(src);
% Get the coordinate IN THE AXES UNITS OF AXES1 (Here I chose to define them
% as pixels) of the point where the user clicked
cursorPoint = get(handles.axes1, 'CurrentPoint')
仍在getMousePositionOnImage
函数中:
% Get the Position of the first image (We're only interested by the width
% and height of the axes1 object)
Img1Pos=get(handles.axes1,'Position')
% Check if inside
if(cursorPoint(1,1)<Img1Pos(3)&&cursorPoint(1,2)<Img1Pos(4)&&cursorPoint(1,1)>=0&&cursorPoint(1,2)>=0)
% Do stuff
end
% Check if inside
if(cursorPoint(1,1)<Img1Pos(3)&&cursorPoint(1,2)<Img1Pos(4)&&cursorPoint(1,1)>=0&&cursorPoint(1,2)>=0)
Lines=findobj('Type','line','Parent',handles.axes1);
if isempty(Lines)
% If Lines is empty, we need to create the line objects
line([0 Img1Pos(3)],[cursorPoint(1,2) cursorPoint(1,2)],'Color','g','Parent',handles.axes1);
line([cursorPoint(1,1) cursorPoint(1,1)],[0 Img1Pos(4)],'Color','g','Parent',handles.axes1);
else
% If not, we just update the fields XData and YData of both Lines
Lines(1).XData=[0 Img1Pos(3)]; % Unnecessary but I'll leave it there for clarity
Lines(1).YData=[cursorPoint(1,2) cursorPoint(1,2)];
Lines(2).XData=[cursorPoint(1,1) cursorPoint(1,1)];
Lines(2).YData=[0 Img1Pos(4)]; % Unnecessary but I'll leave it there for clarity
end
end
现在我将让你做最后一部分,其中涉及链接两个横杆。而不是仅检查点击是否在第一张图像上,您将分别检查两者。然后,如果它位于其中一个图像中,您将两个横杆更新到右轴对象中的点击位置
答案 1 :(得分:0)
以下代码的灵感来自BillBokeey的答案,对此我非常感激。
首先,执行BillBokeey解决方案的第0步和第1步。然后我把这个函数放在我的代码中:
function getMousePositionOnImage(src, event)
% Fetch the current handles structure
handles = guidata(src);
% Get the coordinate IN THE AXES UNITS OF AXES1 (Here I chose to define them
% as pixels) of the point where the user clicked
cursorPoint1 = get(handles.axes2, 'CurrentPoint');
cursorPoint2 = get(handles.axes3, 'CurrentPoint');
% Get the Position of the first image (We're only interested by the width
% and height of the axes1 object)
Img1Pos = getpixelposition(handles.axes2);
Img2Pos = getpixelposition(handles.axes3);
XLim1 = get(handles.axes2, 'XLim');
YLim1 = get(handles.axes2, 'YLim');
XLim2 = get(handles.axes3, 'XLim');
YLim2 = get(handles.axes3, 'YLim');
% Check if inside
if (cursorPoint1(1)<XLim1(2) && cursorPoint1(2)<YLim1(2) && cursorPoint1(1)>=XLim1(1) && cursorPoint1(1)>=YLim1(1))
Lines1=findobj('Type','line','Parent',handles.axes2);
Lines2=findobj('Type','line','Parent',handles.axes3);
if isempty(Lines1)
% If Lines is empty, we need to create the line objects
line(XLim1,[cursorPoint1(1,2) cursorPoint1(1,2)],'Color','g','Parent',handles.axes2);
line([cursorPoint1(1,1) cursorPoint1(1,1)],YLim1,'Color','g','Parent',handles.axes2);
line(XLim2,[cursorPoint1(1,2) cursorPoint1(1,2)],'Color','g','Parent',handles.axes3);
line([cursorPoint1(1,1) cursorPoint1(1,1)],YLim2,'Color','g','Parent',handles.axes3);
else
% If not, we just update the fields XData and YData of both Lines
Lines1(1).XData=XLim1; % Unnecessary but I'll leave it there for clarity
Lines1(1).YData=[cursorPoint1(1,2) cursorPoint1(1,2)];
Lines1(2).XData=[cursorPoint1(1,1) cursorPoint1(1,1)];
Lines1(2).YData=YLim1; % Unnecessary but I'll leave it there for clarity
Lines2(1).XData=XLim2; % Unnecessary but I'll leave it there for clarity
Lines2(1).YData=[cursorPoint1(1,2) cursorPoint1(1,2)];
Lines2(2).XData=[cursorPoint1(1,1) cursorPoint1(1,1)];
Lines2(2).YData=YLim2; % Unnecessary but I'll leave it there for clarity
end
elseif (cursorPoint2(1)<XLim2(2) && cursorPoint2(2)<YLim2(2) && cursorPoint2(1)>=XLim2(1) && cursorPoint2(1)>=YLim2(1))
Lines1=findobj('Type','line','Parent',handles.axes2);
Lines2=findobj('Type','line','Parent',handles.axes3);
if isempty(Lines2)
% If Lines is empty, we need to create the line objects
line(XLim1,[cursorPoint2(1,2) cursorPoint2(1,2)],'Color','g','Parent',handles.axes2);
line([cursorPoint2(1,1) cursorPoint2(1,1)],YLim1,'Color','g','Parent',handles.axes2);
line(XLim2,[cursorPoint2(1,2) cursorPoint2(1,2)],'Color','g','Parent',handles.axes3);
line([cursorPoint2(1,1) cursorPoint2(1,1)],YLim2,'Color','g','Parent',handles.axes3);
else
% If not, we just update the fields XData and YData of both Lines
Lines1(1).XData=XLim1; % Unnecessary but I'll leave it there for clarity
Lines1(1).YData=[cursorPoint2(1,2) cursorPoint2(1,2)];
Lines1(2).XData=[cursorPoint2(1,1) cursorPoint2(1,1)];
Lines1(2).YData=YLim1; % Unnecessary but I'll leave it there for clarity
Lines2(1).XData=XLim2; % Unnecessary but I'll leave it there for clarity
Lines2(1).YData=[cursorPoint2(1,2) cursorPoint2(1,2)];
Lines2(2).XData=[cursorPoint2(1,1) cursorPoint2(1,1)];
Lines2(2).YData=YLim2; % Unnecessary but I'll leave it there for clarity
end
end