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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