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fix convexhull example

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ser1zw 2012-06-03 00:02:18 +09:00
parent bfd4d81549
commit 873a848acf
1 changed files with 32 additions and 26 deletions
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56
examples/convexhull.rb
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@ -1,41 +1,47 @@
#!/usr/bin/env ruby #!/usr/bin/env ruby
# convexhull.rb # convexhull.rb
# Draw contours and convexity defect points to captured image
require "rubygems" require "rubygems"
require "opencv" require "opencv"
require "pp"
include OpenCV include OpenCV
window = GUI::Window.new("convexhull") window = GUI::Window.new("convexhull")
pp CvCapture::INTERFACE
capture = CvCapture::open capture = CvCapture::open
accuracy = 0.1 accuracy = 1
t = window.set_trackbar("accuracy", 100, 1){|v| t = window.set_trackbar("accuracy", 10, 1) { |v|
accuracy = 0.1 * v accuracy = v
} }
while true circle_options = { :color => CvColor::Blue, :line_type => :aa, :thickness => -1 }
key = GUI::wait_key(1)
image = capture.query
gray = image.BGR2GRAY
bin = gray.threshold_binary(0x44, 0xFF)
contours = bin.find_contours
while contours
image.poly_line! contours.approx(:accuracy => accuracy), :color => CvScalar::Red
contours.convexity_defects.each{|cd|
image.circle! cd.start, 1, :color => CvScalar::Blue
image.circle! cd.end, 1, :color => CvScalar::Blue
image.circle! cd.depth_point, 1, :color => CvScalar::Blue
}
loop do
image = capture.query
# Calculate contours from a binary image
gray = image.BGR2GRAY
bin = gray.threshold(0x44, 0xFF, :binary)
contours = bin.find_contours
while contours
# Draw contours
poly = contours.approx(:accuracy => accuracy)
begin
image.draw_contours!(poly, CvColor::Red, CvColor::Black, 2,
:thickness => 2, :line_type => :aa)
end while (poly = poly.h_next)
# Draw convexity defects
hull = contours.convex_hull2(true, false)
contours.convexity_defects(hull).each { |cd|
image.circle!(cd.start, 3, circle_options)
image.circle!(cd.depth_point, 3, circle_options)
image.circle!(cd.end, 3, circle_options)
}
contours = contours.h_next contours = contours.h_next
end end
#pts = gray.good_features_to_track(0.01, 10)
#puts pts.length
window.show image window.show image
next unless key exit if GUI::wait_key(1)
case key.chr
when "\e"
exit
end
end end