function show(I,M)%show - show content aware image resizing%% show(I,M) opens a figure window to allow interactive resizing of I% in one direction based on the seam removal map M.%% See also removalMap.% figure out if seams are horizontal or vertical[h,w] = size(M);horiz = all(sum(M,1)==sum(1:h))vert = all(sum(M,2)==sum(1:w))if ~xor(horiz,vert), error('seams not horizontal or vertical?!'); endfh = figure; clf;set(fh,'DoubleBuffer','on');set(fh,'WindowButtonDownFcn',@mouseDown);set(fh,'WindowButtonMotionFcn',@mouseMove);set(fh,'WindowButtonUpFcn',@mouseUp);set(fh,'WindowScrollWheelFcn',@mouseWheel);% set(fh,'Interruptible','off');% set(fh,'BusyAction','queue');if horiz,    ih = imshow(cat(1,I,I));    title('horizontal seams');else    ih = imshow(cat(2,I,I));    title('vertical seams');endset(ih,'CData',I);if ~horiz,    I = permute(I,[2,1,3]);    M = M';end[h,w] = size(M);n = 0; % how many seams we are removing    % remove an additional dn seams    function move(dn)        n = n + dn;        if n >= 0, % shrink image            if horiz,                set(ih,'CData',shrink(I,M,n));            else                set(ih,'CData',permute(shrink(I,M,n),[2,1,3]));            end        else % grow image            if horiz,                set(ih,'CData',expand(I,M,-n));            else                set(ih,'CData',permute(expand(I,M,-n),[2,1,3]));            end        end        drawnow;    endp0 = []; % location of mouse down eventdrag = false; % is the mouse being dragged?moving = false; % are we moving the image?    function mouseDown(src,evt)        p0 = get(fh,'CurrentPoint');        drag = true;    end    function mouseMove(src,evt)        if ~drag, return; end        if moving, return; end % serialize execution of this function        moving = true;        p = get(fh,'CurrentPoint');        if horiz,            move( p(2) - p0(2) );        else            move( p0(1) - p(1) );        end        p0 = p;        moving = false;    end    function mouseWheel(src,evt)        move( -evt.VerticalScrollCount * evt.VerticalScrollAmount );    end    function mouseUp(src,evt)        drag = false;    endend