fix inpaint example

examples/inpaint.rb

@@ -2,41 +2,56 @@
 # inpaint.rb
 require "rubygems"
 require "opencv"
-
 include OpenCV
 
-owindow = GUI::Window.new "original"
-mwindow = GUI::Window.new "mask"
-iwindow = GUI::Window.new "inpaint"
+puts <<EOS
+Inpainting sample
 
-image = IplImage::load "inpaint.png"
+Usage:
+  'dilate' bar - Adjust mask to inpaint (Non-black areas indicate the area that needs to be inpainted).
+  'radius' bar - Adjust radius of a circular neighborhood of each point inpainted.
+  'n' key - Inpaint using Navier-Stokes based method
+  't' key - Inpaint using Alexandru Telea's method
+  'c' key - Clear the inpaint window
+  'ESC' key - exit"
+EOS
+
+owindow = GUI::Window.new('original')
+mwindow = GUI::Window.new('mask')
+iwindow = GUI::Window.new('inpaint')
+
+image = IplImage::load('inpaint.png')
+noimage = image.zero
 b, g, r = image.split
 original_mask = r.threshold(0x00, 0xFF, CV_THRESH_BINARY_INV) & b.threshold(0x00, 0xFF, CV_THRESH_BINARY_INV)
 mask = original_mask.copy
 
 num_dilate = 3
-radius = 5
-dilate_bar = mwindow.set_trackbar("dilate", 10, num_dilate){|v|
+mwindow.set_trackbar("dilate", 10, num_dilate) { |v|
   num_dilate = v
   mask = original_mask.dilate(nil, num_dilate)
   mwindow.show mask  
 }
 
-radius_bar = mwindow.set_trackbar("radius", 30, radius){|v|
+radius = 5
+mwindow.set_trackbar("radius", 10, radius) { |v|
   radius = v
 }
 
 owindow.show image
 mwindow.show mask
+iwindow.show noimage
 
 while key = GUI::wait_key
   case key.chr
   when "\e" # esc
     exit
   when "n"
-    iwindow.show image.inpaint_ns(mask, radius)
+    iwindow.show image.inpaint(:ns, mask, radius)
   when "t"
-    iwindow.show image.inpaint_telea(mask, radius)
+    iwindow.show image.inpaint(:telea, mask, radius)
+  when "c"
+    iwindow.show noimage
   end
 end