[5] | 1 | function lab = impatch(fig,action,varargin) |
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| 2 | %IMPATCH Create and change a polygon label overlay on an image |
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| 3 | % |
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| 4 | % OUT = IMPATCH(H,ACTION,VARARGIN) |
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| 5 | % |
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| 6 | % Draw some patches as overlay over an image, given by the handle H. |
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| 7 | % Possible actions are: |
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| 8 | % |
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| 9 | % Press left button to draw lines, right button to end the patch. |
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| 10 | % >> impatch(h,'label',2,[0 0 1]) defines label 2 in blue |
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| 11 | % >> impatch(h,'label',3,'g') defines label 2 in blue |
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| 12 | % >> impatch(h,'label',1) set active label to 1 |
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| 13 | % >> out = impatch(h,'get') get the labels out. |
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| 14 | % Press ESC to cancel drawing and deleting the polygon. |
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| 15 | % |
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| 16 | % When H is not given, it will take the current active figure. |
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| 17 | % |
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| 18 | % Example (when you have dipimage in your path): |
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| 19 | % im = laplace; |
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| 20 | % impaint % now click somewhere in the image, |
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| 21 | % % use leftclick to add more lines |
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| 22 | % % use rightclick to close the polygon |
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| 23 | % impaint('label',2,'b') % make a second label, in blue |
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| 24 | % impaint('label',3,[0 1 0]) %make third label in green |
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| 25 | % out = impaint('get') % get the label image out |
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| 26 | |
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| 27 | % Copyright: D.M.J. Tax, D.M.J.Tax@prtools.org |
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| 28 | % Faculty EWI, Delft University of Technology |
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| 29 | % P.O. Box 5031, 2600 GA Delft, The Netherlands |
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| 30 | |
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| 31 | if nargin<2 |
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| 32 | action = []; |
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| 33 | end |
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| 34 | if nargin<1 |
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| 35 | fig = gcbf; |
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| 36 | end |
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| 37 | % If the figure handle is not given, add it and move all other |
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| 38 | % arguments: |
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| 39 | if ischar(fig) |
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| 40 | varargin = {action varargin{:}}; |
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| 41 | action = fig; |
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| 42 | fig = gcbf; |
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| 43 | end |
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| 44 | if ~ishandle(fig) & isnumeric(fig) % we forgot to put 'label' ??? |
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| 45 | varargin = {fig action varargin{:}}; |
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| 46 | action = 'label'; |
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| 47 | fig = gcf; |
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| 48 | end |
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| 49 | |
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| 50 | |
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| 51 | % First check if the figure has already some patches: |
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| 52 | if isempty(fig) |
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| 53 | fig = gcf; |
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| 54 | UD = get(fig,'userdata'); |
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| 55 | if isempty(UD) | ~isfield(UD,'impatch') |
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| 56 | % OK, now we have to initialize it... |
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| 57 | % maybe for speedup??: |
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| 58 | set(fig,'busyaction','cancel','doublebuffer','on'); |
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| 59 | UD.impatch = []; |
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| 60 | % initialize |
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| 61 | UD.impatch.mode = 'start'; |
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| 62 | UD.impatch.curr = 0; % current polygon |
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| 63 | UD.impatch.currlab = 1; % current label |
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| 64 | UD.impatch.clrs = [1 0 0]; |
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| 65 | UD.impatch.nrp = 0; % no polygons defined |
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| 66 | UD.impatch.h = []; |
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| 67 | UD.impatch.hlab = []; |
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| 68 | % take care of the position and size |
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| 69 | % check if there is an axes object: |
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| 70 | hh = get(fig,'children'); |
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| 71 | for i=length(hh) |
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| 72 | isax(i) = strcmp('axes',get(hh(i),'type')); |
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| 73 | end |
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| 74 | if sum(isax)==0 |
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| 75 | error('I cannot find an axes!'); |
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| 76 | end |
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| 77 | if sum(isax)>1 |
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| 78 | error('There are several axes defined:-('); |
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| 79 | end |
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| 80 | hax = hh(find(isax)); |
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| 81 | UD.impatch.units = get(hax,'units'); |
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| 82 | set(hax,'units','normalized'); |
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| 83 | UD.impatch.pos = get(hax,'position'); |
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| 84 | him = get(hax,'children'); |
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| 85 | % for recomputing the coordinates: |
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| 86 | UD.impatch.sz = size(get(him,'cdata')); |
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| 87 | UD.impatch.W = UD.impatch.sz(2)./UD.impatch.pos(3); |
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| 88 | UD.impatch.H = UD.impatch.sz(1)./UD.impatch.pos(4); |
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| 89 | UD.impatch.pos(3) = UD.impatch.pos(3)+UD.impatch.pos(1); |
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| 90 | UD.impatch.pos(4) = UD.impatch.pos(4)+UD.impatch.pos(2); |
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| 91 | |
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| 92 | % take care for the callback function: |
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| 93 | %get(fig,'windowbuttondownfcn') %DXD |
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| 94 | UD.impatch.olddownfcn = get(fig,'windowbuttondownfcn'); |
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| 95 | UD.impatch.oldmotionfcn = get(fig,'windowbuttonmotionfcn'); |
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| 96 | UD.impatch.oldkeypressfcn = get(fig,'keypressfcn'); |
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| 97 | set(fig,'userdata',UD); |
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| 98 | |
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| 99 | set(fig,'WindowButtonDownFcn','impatch'); |
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| 100 | set(fig,'KeyPressFcn','impatch(''character'')'); |
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| 101 | end |
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| 102 | end |
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| 103 | |
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| 104 | % The special case that we get direct actions, instead of mouse events: |
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| 105 | if ~isempty(action) |
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| 106 | switch action |
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| 107 | case 'get' % we want to get the label image out |
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| 108 | % set up: |
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| 109 | UD = get(gcf,'userdata'); |
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| 110 | % go over all the patches: |
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| 111 | lab = zeros(UD.impatch.sz); |
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| 112 | [X,Y] = meshgrid(1:UD.impatch.sz(2), 1:UD.impatch.sz(1)); |
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| 113 | for i=1:length(UD.impatch.h) |
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| 114 | vx = get(UD.impatch.h(i),'xdata'); |
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| 115 | vy = get(UD.impatch.h(i),'ydata'); |
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| 116 | im = inpolygon(X,Y,vx,vy); |
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| 117 | I = find(im); |
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| 118 | lab(I) = UD.impatch.hlab(i); |
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| 119 | %lab = im; |
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| 120 | end |
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| 121 | return |
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| 122 | case 'label' % add a new label or change active label |
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| 123 | % set up: |
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| 124 | UD = get(gcf,'userdata'); |
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| 125 | newnr = varargin{1}; |
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| 126 | if newnr>size(UD.impatch.clrs,1) % add a new label |
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| 127 | if length(varargin)<2 |
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| 128 | error('I am expecting now a colour definition'); |
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| 129 | end |
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| 130 | if (newnr>size(UD.impatch.clrs,1)+1) |
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| 131 | newnr=size(UD.impatch.clrs,1)+1; |
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| 132 | end |
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| 133 | % check if the color definition is acceptable: |
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| 134 | newclr = checkcolour(varargin{2}); |
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| 135 | % and commit: |
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| 136 | UD.impatch.currlab = newnr; |
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| 137 | UD.impatch.clrs(newnr,:) = newclr; |
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| 138 | else % change the active label |
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| 139 | if newnr>0 |
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| 140 | UD.impatch.currlab = newnr; |
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| 141 | end |
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| 142 | end |
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| 143 | % Save the results: |
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| 144 | set(gcf,'userdata',UD); |
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| 145 | return; |
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| 146 | case 'off' % remove all traces from the figure |
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| 147 | UD = get(gcf,'userdata'); |
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| 148 | if ~isempty(UD) & isfield(UD,'impatch') |
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| 149 | set(gcf,'windowbuttondownfcn',UD.impatch.olddownfcn); |
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| 150 | set(gcf,'windowbuttonmotionfcn',UD.impatch.oldmotionfcn); |
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| 151 | set(gcf,'keypressfcn',UD.impatch.oldkeypressfcn); |
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| 152 | delete(UD.impatch.h); |
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| 153 | UD = rmfield(UD,'impatch'); |
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| 154 | if size(fieldnames(UD),1)==0, UD = []; end |
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| 155 | set(gcf,'userdata',UD); |
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| 156 | return |
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| 157 | end |
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| 158 | case 'character' % A user pressed a key |
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| 159 | ch = double(get(gcf,'currentcharacter')); |
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| 160 | if isempty(ch), return, end |
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| 161 | UD = get(gcf,'userdata'); |
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| 162 | switch ch |
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| 163 | case 27 % ESCAPE |
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| 164 | % switch UD.impatch.mode |
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| 165 | % case 'draw' % cancel this complete line |
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| 166 | UD.impatch.hlab(UD.impatch.curr) = []; |
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| 167 | delete(UD.impatch.h(UD.impatch.curr)); |
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| 168 | UD.impatch.h(UD.impatch.curr) = []; |
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| 169 | UD.impatch.nrp = UD.impatch.nrp-1; |
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| 170 | UD.impatch.curr = 0; |
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| 171 | UD.impatch.mode = 'start'; |
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| 172 | set(gcf,'userdata',UD); |
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| 173 | set(fig,'windowbuttonmotionfcn',UD.impatch.oldmotionfcn); |
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| 174 | % case 'move' % cancel the movement of the node |
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| 175 | % end |
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| 176 | end |
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| 177 | return |
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| 178 | |
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| 179 | end |
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| 180 | end |
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| 181 | |
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| 182 | % Get the userdata |
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| 183 | UD = get(fig,'userdata'); |
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| 184 | % Check if the cursor position is inside the image: |
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| 185 | set(fig,'units','normalized'); |
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| 186 | pos = get(fig,'currentpoint'); |
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| 187 | if pos(1)<UD.impatch.pos(1) | pos(1)>UD.impatch.pos(3) | ... |
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| 188 | pos(2)<UD.impatch.pos(2) | pos(2)>UD.impatch.pos(4) |
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| 189 | return |
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| 190 | end |
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| 191 | % Compute the position: |
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| 192 | pos(1) = round((pos(1)-UD.impatch.pos(1))*UD.impatch.W); |
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| 193 | pos(2) = round(UD.impatch.sz(1) - (pos(2)-UD.impatch.pos(2))*UD.impatch.H); |
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| 194 | |
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| 195 | % Now do the actions that need the position of the cursor: |
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| 196 | if strcmp(action,'move'); |
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| 197 | switch UD.impatch.mode |
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| 198 | case 'draw' |
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| 199 | h = UD.impatch.h(UD.impatch.curr); |
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| 200 | xd = get(h,'xdata'); yd = get(h,'ydata'); |
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| 201 | xd(end) = pos(1); yd(end) = pos(2); |
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| 202 | set(h,'xdata',xd); set(h,'ydata',yd); |
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| 203 | case 'move' % we want to move a node... |
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| 204 | minnode = UD.impatch.currnode; |
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| 205 | hh = UD.impatch.h(UD.impatch.curr); |
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| 206 | xd = get(hh,'xdata'); yd = get(hh,'ydata'); |
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| 207 | xd(minnode) = pos(1); yd(minnode) = pos(2); |
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| 208 | set(hh,'xdata',xd); set(hh,'ydata',yd); |
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| 209 | end |
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| 210 | % Save the results: |
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| 211 | set(fig,'userdata',UD); |
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| 212 | return |
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| 213 | end |
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| 214 | |
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| 215 | % Otherwise we have to check mouse buttons |
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| 216 | switch UD.impatch.mode |
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| 217 | case 'start' % start a new line |
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| 218 | switch get(fig,'selectiontype') |
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| 219 | case 'alt' |
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| 220 | if length(UD.impatch.h)==0 |
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| 221 | return; |
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| 222 | end |
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| 223 | % Find nearest node |
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| 224 | mind = inf; minp = 0; minnode = 0; |
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| 225 | for i=1:length(UD.impatch.h) |
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| 226 | hh = UD.impatch.h(i); |
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| 227 | coord = [get(hh,'xdata') get(hh,'ydata')]; |
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| 228 | N = size(coord,1); |
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| 229 | diff = repmat(pos,N,1) - coord; |
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| 230 | [diff,nodenr] = min(sum(diff.*diff,2)); |
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| 231 | if diff<mind |
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| 232 | mind = diff; |
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| 233 | minp = i; |
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| 234 | minnode = nodenr; |
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| 235 | end |
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| 236 | end |
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| 237 | % If we are close enough, we should move the node... |
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| 238 | if mind<100 % magic distance |
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| 239 | UD.impatch.curr = minp; |
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| 240 | UD.impatch.currnode = minnode; |
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| 241 | hh = UD.impatch.h(minp); |
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| 242 | xd = get(hh,'xdata'); yd = get(hh,'ydata'); |
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| 243 | xd(minnode) = pos(1); yd(minnode) = pos(2); |
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| 244 | set(hh,'xdata',xd); set(hh,'ydata',yd); |
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| 245 | UD.impatch.mode = 'move'; |
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| 246 | set(fig,'WindowButtonMotionFcn','impatch(''move'')'); |
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| 247 | end |
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| 248 | case 'normal' |
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| 249 | % Set the number of the current polygon |
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| 250 | UD.impatch.nrp = UD.impatch.nrp+1; |
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| 251 | UD.impatch.curr = UD.impatch.nrp; |
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| 252 | % Define the colour for this line |
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| 253 | thisclr = UD.impatch.clrs(UD.impatch.currlab,:); |
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| 254 | UD.impatch.h(UD.impatch.curr) = line([pos(1) pos(1)],[pos(2) pos(2)]); |
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| 255 | UD.impatch.hlab(UD.impatch.curr) = UD.impatch.currlab; |
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| 256 | set(UD.impatch.h(UD.impatch.curr),'color',thisclr); |
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| 257 | UD.impatch.mode = 'draw'; |
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| 258 | set(fig,'WindowButtonMotionFcn','impatch(''move'')'); |
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| 259 | end |
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| 260 | % Save the results: |
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| 261 | set(fig,'userdata',UD); |
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| 262 | return |
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| 263 | case 'draw' |
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| 264 | switch get(fig,'selectiontype') |
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| 265 | case 'normal' % extend the line with a new node |
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| 266 | h = UD.impatch.h(UD.impatch.curr); |
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| 267 | xd = get(h,'xdata'); yd = get(h,'ydata'); |
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| 268 | xd(end+1) = pos(1); yd(end+1) = pos(2); |
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| 269 | set(h,'xdata',xd); set(h,'ydata',yd); |
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| 270 | case 'alt' % end the line, and fill the polygon |
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| 271 | h = UD.impatch.h(UD.impatch.curr); |
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| 272 | xd = get(h,'xdata'); yd = get(h,'ydata'); |
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| 273 | % get rid of the last point, that was only glued to the pointer: |
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| 274 | xd(end) = []; yd(end) = []; |
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| 275 | delete(h); % will this be OK?? |
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| 276 | myclr = UD.impatch.clrs(UD.impatch.hlab(UD.impatch.curr),:); |
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| 277 | h = patch(xd,yd, myclr); |
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| 278 | set(h,'facealpha',0.5); |
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| 279 | UD.impatch.h(UD.impatch.curr) = h; |
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| 280 | UD.impatch.curr = 0; |
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| 281 | UD.impatch.mode = 'start'; |
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| 282 | set(fig,'windowbuttonmotionfcn',UD.impatch.oldmotionfcn); |
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| 283 | end |
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| 284 | case 'move' |
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| 285 | minnode = UD.impatch.currnode; |
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| 286 | hh = UD.impatch.h(UD.impatch.curr); |
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| 287 | xd = get(hh,'xdata'); yd = get(hh,'ydata'); |
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| 288 | xd(minnode) = pos(1); yd(minnode) = pos(2); |
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| 289 | set(hh,'xdata',xd); set(hh,'ydata',yd); |
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| 290 | UD.impatch.mode = 'start'; |
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| 291 | end |
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| 292 | |
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| 293 | % Save the results: |
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| 294 | set(fig,'userdata',UD); |
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| 295 | |
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| 296 | return |
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| 297 | |
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| 298 | function newclr = checkcolour(newclr) |
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| 299 | |
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| 300 | if ischar(newclr) |
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| 301 | if length(newclr)>1 |
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| 302 | error('I am expecting a single character'); |
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| 303 | end |
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| 304 | defclrchar = 'rbgymc'; |
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| 305 | defclrs = [1 0 0; 0 0 1; 0 1 0; 1 1 0; 1 0 1; 0 1 1]; |
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| 306 | newclr = find(defclrchar==newclr); |
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| 307 | if isempty(newclr) |
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| 308 | error('Not a legal colour definition'); |
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| 309 | end |
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| 310 | newclr = defclrs(newclr,:); |
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| 311 | else |
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| 312 | newclr = newclr(:)'; |
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| 313 | if length(newclr)~=3 |
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| 314 | error('The colour definition should have R G and B'); |
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| 315 | end |
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| 316 | if any(newclr<0) |
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| 317 | error('Colour values should be larger than 0.'); |
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| 318 | end |
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| 319 | if any(newclr>1) |
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| 320 | error('Colour values should be smaller than 1.'); |
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| 321 | end |
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| 322 | end |
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| 323 | return |
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