Update to 2.0.0 tree from current Fremantle build

[opencv] / samples / octave / edge.m

diff --git a/samples/octave/edge.m b/samples/octave/edge.m
new file mode 100644 (file)
index 0000000..c2d2d3e
--- /dev/null
+++ b/samples/octave/edge.m
@@ -0,0 +1,69 @@
+#! /usr/bin/env octave
+
+printf("OpenCV Octave version of edge\n");
+
+global g;
+
+## import the necessary things for OpenCV
+cv;
+highgui;
+
+## some definitions
+g.win_name = "Edge";
+g.trackbar_name = "Threshold";
+
+## the callback on the trackbar
+function on_trackbar (position)
+  global g;
+  global cv;
+  global highgui;
+
+  cv.cvSmooth (g.gray, g.edge, cv.CV_BLUR, 3, 3, 0);
+  cv.cvNot (g.gray, g.edge);
+
+  ## run the edge dector on gray scale
+  cv.cvCanny (g.gray, g.edge, position, position * 3, 3);
+
+  ## reset
+  cv.cvSetZero (g.col_edge);
+
+  ## copy edge points
+  cv.cvCopy (g.image, g.col_edge, g.edge);
+  
+  ## show the image
+  highgui.cvShowImage (g.win_name, g.col_edge);
+endfunction
+
+filename = "../c/fruits.jpg";
+
+if (size(argv, 1)>1)
+  filename = argv(){1};
+endif
+
+## load the image gived on the command line
+g.image = highgui.cvLoadImage (filename);
+
+if (!swig_this(g.image))
+  printf("Error loading image '%s'",filename);
+  exit(-1);
+endif
+
+## create the output image
+g.col_edge = cv.cvCreateImage (cv.cvSize (g.image.width, g.image.height), 8, 3);
+
+## convert to grayscale
+g.gray = cv.cvCreateImage (cv.cvSize (g.image.width, g.image.height), 8, 1);
+g.edge = cv.cvCreateImage (cv.cvSize (g.image.width, g.image.height), 8, 1);
+cv.cvCvtColor (g.image, g.gray, cv.CV_BGR2GRAY);
+
+## create the window
+highgui.cvNamedWindow (g.win_name, highgui.CV_WINDOW_AUTOSIZE);
+
+## create the trackbar
+highgui.cvCreateTrackbar (g.trackbar_name, g.win_name, 1, 100, @on_trackbar);
+
+## show the image
+on_trackbar (0);
+
+## wait a key pressed to end
+highgui.cvWaitKey (0);