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1 function image(x, zoom) |
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2 #Display an octave image matrix. |
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3 # |
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4 #image(x) displays a matrix as a color image. The elements of x are indices |
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5 #into the current colormap and should have values between 1 and the length |
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6 #of the colormap. |
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7 # |
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8 #image(x,zoom) changes the zoom factor. The default value is 4. |
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9 # |
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10 #SEE ALSO: imshow, imagesc, colormap. |
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11 |
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12 #Author: |
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13 # Tony Richardson |
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14 # amr@mpl.ucsd.edu |
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15 # July 1994 |
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16 # |
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17 #Modified: |
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18 # Tony Richardson |
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19 # amr@mpl.ucsd.edu |
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20 # July 1994 |
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21 # (Modifications based on suggestions from John Eaton.) |
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22 |
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23 global IMAGEDIR |
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24 |
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25 if (nargin == 0) |
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26 # Load Bobbie Jo Richardson (Born 3/16/94) |
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27 x = loadimage([IMAGEDIR,"/default.img"]); |
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28 zoom = 2; |
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29 elseif(nargin == 1) |
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30 zoom = 4; |
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31 elseif(nargin > 2) |
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32 error("usage: image (matrix, [zoom])"); |
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33 endif |
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34 |
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35 # Generate random file name |
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36 rnd_str = num2str(fix(rand*10000)); |
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37 ppm_name = ["image.", rnd_str, ".ppm" ]; |
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38 |
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39 saveimage(ppm_name,x,"ppm"); |
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40 |
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41 # Start the viewer |
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42 # Try xv, then xloadimage. |
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43 |
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44 xv = sprintf("xv -expand %f %s",zoom,ppm_name); |
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45 xloadimage = sprintf("xloadimage -zoom %f %s",zoom*100, ppm_name); |
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46 rm = sprintf("rm -f %s",ppm_name); |
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47 |
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48 command = sprintf("( %s || %s && %s ) > /dev/null 2>&1 &", ... |
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49 xv, xloadimage, rm); |
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50 |
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51 shell_cmd(command); |
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52 |
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53 endfunction |
