鼠标划取图像区域并计算面积的matlab代码

%%%%% main.m %%%%%%%

% V 是一个三维数组

hfig = figure;

for slice=200:1:280
    A=squeeze(V(:,slice,:));
    MyMouseMotion(A,slice,hfig);
    disp(['Next Figure! No. ',num2str(slice+1)]);

end

%%%%% MyMouseMotion.m %%%%%%%%

function MyMouseMotion(A,slice,hfig)
    ah = axes('DrawMode','fast'); 
    imagesc(A); colormap gray;
    caxis([0,200]);
%     set(hfig, 'position', get(0,'ScreenSize'));  %Full Screen
%     axis ([20 220 20 220]) % Set axis range
    title(num2str(slice));
    X=[];
    Y=[];
    Area=[];
    flag=1;
    set(hfig,'WindowButtonDownFcn',@wbdcb); %callback func when mouse is clicked
    while flag=