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1 ### Copyright (C) 1996 John W. Eaton |
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2 ### |
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3 ### This file is part of Octave. |
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4 ### |
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5 ### Octave is free software; you can redistribute it and/or modify it |
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6 ### under the terms of the GNU General Public License as published by |
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7 ### the Free Software Foundation; either version 2, or (at your option) |
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8 ### any later version. |
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9 ### |
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10 ### Octave is distributed in the hope that it will be useful, but |
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11 ### WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ### General Public License for more details. |
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14 ### |
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15 ### You should have received a copy of the GNU General Public License |
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16 ### along with Octave; see the file COPYING. If not, write to the Free |
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17 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ### 02111-1307, USA. |
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19 |
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20 ## Display an octave image matrix. |
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21 ## |
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22 ## image (x) displays a matrix as a color image. The elements of x are |
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23 ## indices into the current colormap and should have values between 1 |
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24 ## and the length of the colormap. |
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25 ## |
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26 ## image (x, zoom) changes the zoom factor. The default value is 4. |
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27 ## |
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28 ## SEE ALSO: imshow, imagesc, colormap. |
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29 |
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30 function image (x, zoom) |
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31 |
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32 ## Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994. |
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33 |
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34 if (nargin == 0) |
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35 ## Load Bobbie Jo Richardson (Born 3/16/94) |
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36 x = loadimage ("default.img"); |
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37 zoom = 2; |
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38 elseif (nargin == 1) |
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39 zoom = 4; |
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40 elseif (nargin > 2) |
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904
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41 usage ("image (matrix, [zoom])"); |
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42 endif |
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43 |
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44 ## XXX FIXME XXX -- we should use octave_tmp_file_name. |
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45 |
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46 rnd_str = num2str (fix (rand * 10000)); |
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47 ppm_name = ["image.", rnd_str, ".ppm" ]; |
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48 |
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49 saveimage (ppm_name, x, "ppm"); |
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50 |
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51 ## Start the viewer. Try xv, then xloadimage. |
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52 |
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53 xv = sprintf ("xv -expand %f %s", zoom, ppm_name); |
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54 xloadimage = sprintf ("xloadimage -zoom %f %s", zoom*100, ppm_name); |
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55 rm = sprintf ("rm -f %s", ppm_name); |
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559
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56 |
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57 command = sprintf ("( %s || %s && %s ) > /dev/null 2>&1 &", ... |
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58 xv, xloadimage, rm); |
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59 |
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60 system (command); |
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61 |
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62 endfunction |
