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comparison scripts/image/image.m @ 6257:44c91c5dfe1d

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[project @ 2007-01-30 19:16:52 by jwe]
author jwe
date Tue, 30 Jan 2007 19:16:55 +0000
parents d90b16110095
children 77df53484011
comparison
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6256:83949ae13b2c 6257:44c91c5dfe1d
16 ## along with Octave; see the file COPYING. If not, write to the Free 16 ## along with Octave; see the file COPYING. If not, write to the Free
17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 17 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 ## 02110-1301, USA. 18 ## 02110-1301, USA.
19 19
20 ## -*- texinfo -*- 20 ## -*- texinfo -*-
21 ## @deftypefn {Function File} {} image (@var{x}, @var{zoom}) 21 ## @deftypefn {Function File} {} image (@var{img})
22 ## @deftypefnx {Function File} {} image (@var{x}, @var{y}, @var{A}, @var{zoom}) 22 ## @deftypefnx {Function File} {} image (@var{x}, @var{y}, @var{img})
23 ## Display a matrix as a color image. The elements of @var{x} are indices 23 ## Display a matrix as a color image. The elements of @var{x} are indices
24 ## into the current colormap and should have values between 1 and the 24 ## into the current colormap and should have values between 1 and the
25 ## length of the colormap. If @var{zoom} is omitted, the image will be 25 ## length of the colormap.
26 ## scaled to fit within 600x350 (to a max of 4).
27 ## 26 ##
28 ## It first tries to use @code{gnuplot}, then @code{display} from 27 ## It first tries to use @code{gnuplot}, then @code{display} from
29 ## @code{ImageMagick}, then @code{xv}, and then @code{xloadimage}. 28 ## @code{ImageMagick}, then @code{xv}, and then @code{xloadimage}.
30 ## The actual program used can be changed using the @code{image_viewer} 29 ## The actual program used can be changed using the @code{image_viewer}
31 ## function. 30 ## function.
38 37
39 ## Author: Tony Richardson <arichard@stark.cc.oh.us> 38 ## Author: Tony Richardson <arichard@stark.cc.oh.us>
40 ## Created: July 1994 39 ## Created: July 1994
41 ## Adapted-By: jwe 40 ## Adapted-By: jwe
42 41
43 function image (x, y, A, zoom) 42 function image (x, y, img)
43
44 newplot ();
44 45
45 if (nargin == 0) 46 if (nargin == 0)
46 ## Load Bobbie Jo Richardson (Born 3/16/94) 47 ## Load Bobbie Jo Richardson (Born 3/16/94)
47 A = loadimage ("default.img"); 48 img = loadimage ("default.img");
48 zoom = 2;
49 x = y = []; 49 x = y = [];
50 elseif (nargin == 1) 50 elseif (nargin == 1)
51 A = x; 51 img = x;
52 zoom = [];
53 x = y = []; 52 x = y = [];
54 elseif (nargin == 2) 53 elseif (nargin > 3)
55 A = x; 54 print_usage ();
56 zoom = y;
57 x = y = [];
58 elseif (nargin == 3)
59 zoom = [];
60 elseif (nargin > 4)
61 usage ("image (matrix, zoom) or image (x, y, matrix, zoom)");
62 endif 55 endif
63 56
64 if (isempty (zoom)) 57 if (isempty (img))
65 ## Find an integer scale factor which sets the image to 58 error ("image: matrix is empty");
66 ## approximately the size of the screen.
67 zoom = min ([350/rows(A), 600/columns(A), 4]);
68 if (zoom >= 1)
69 zoom = floor (zoom);
70 else
71 zoom = 1 / ceil (1/zoom);
72 endif
73 endif 59 endif
74 60
75 ## Get the image viewer. 61 ## Use the newly added mode of "plot" called "with image".
76 [view_cmd, view_fcn, view_zoom] = image_viewer (); 62 if (isempty (x))
63 x = [1, columns(img)];
64 endif
77 65
78 ## Show the image. 66 if (isempty (y))
79 view_fcn (x, y, A, zoom*view_zoom, view_cmd); 67 y = [1, rows(img)];
68 endif
69
70 ca = gca ();
71
72 s = __uiobject_image_ctor__ (ca);
73
74 s.cdata = img;
75
76 tmp = __uiobject_make_handle__ (s);
77
78 __uiobject_adopt__ (ca, tmp);
79
80 xlim = [x(1), x(end)];
81 ylim = [y(1), y(end)];
82
83 set (ca, "view", [0, 90], "xlim", xlim, "ylim", ylim);
84
85 if (nargout > 0)
86 h = tmp;
87 endif
88
89 drawnow ();
80 90
81 endfunction 91 endfunction