--- a/scripts/image/ind2rgb.m	Thu May 30 14:19:59 2013 -0400
+++ b/scripts/image/ind2rgb.m	Fri May 31 13:27:04 2013 +0100
@@ -31,6 +31,8 @@
 ## channels).  Alternatively, the individual red, green, and blue color matrices
 ## of size MxN may be returned.
 ##
+## Multidimensional indexed images (of size MxNx1xK) are also supported.
+##
 ## @seealso{rgb2ind, ind2gray, hsv2rgb, ntsc2rgb}
 ## @end deftypefn
 
@@ -53,7 +55,14 @@
 
   ## Use ND array if only one output is requested.
   if (nargout <= 1)
-    R = reshape ([R(:); G(:); B(:)], [sz, 3]);
+    if (ndims (x) == 2)
+      R = reshape ([R(:); G(:); B(:)], [sz, 3]);
+    elseif (ndims (x) == 4)
+      R = permute (reshape ([R(:); G(:); B(:)], [sz(1) sz(2) sz(4) 3]), [1 2 4 3]);
+    else
+      ## we should never reach here since ind2x() should filter them out
+      error ("ind2rgb: an indexed image must have 2 or 4 dimensions.");
+    endif
   endif
 
 endfunction