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ruby-opencv/test/helper.rb

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#!/usr/bin/env ruby
# -*- mode: ruby; coding: utf-8-unix -*-
require 'test/unit'
require 'digest/md5'
require 'opencv'
include OpenCV
class OpenCVTestCase < Test::Unit::TestCase
SAMPLE_DIR = File.expand_path(File.dirname(__FILE__)) + '/samples/'
FILENAME_CAT = SAMPLE_DIR + 'cat.jpg'
FILENAME_LENA256x256 = SAMPLE_DIR + 'lena-256x256.jpg'
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FILENAME_LENA32x32 = SAMPLE_DIR + 'lena-32x32.jpg'
FILENAME_LENA_EYES = File.expand_path(File.dirname(__FILE__)) + '/samples/lena-eyes.jpg'
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FILENAME_FRUITS = SAMPLE_DIR + 'fruits.jpg'
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FILENAME_CONTOURS = File.expand_path(File.dirname(__FILE__)) + '/samples/contours.jpg'
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FILENAME_CHESSBOARD = SAMPLE_DIR + 'chessboard.jpg'
HAARCASCADE_FRONTALFACE_ALT = SAMPLE_DIR + 'haarcascade_frontalface_alt.xml.gz'
AVI_SAMPLE = SAMPLE_DIR + 'movie_sample.avi'
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DUMMY_OBJ = Digest::MD5.new # dummy object for argument type check test
def snap(*images)
n = -1
images.map! { |val|
n += 1
if val.is_a? Hash
val
elsif val.is_a? Array
{:title => val[0], :image => val[1] }
else
{:title => "snap-#{n}", :image => val }
end
}
pos = CvPoint.new(0, 0)
images.each { |img|
w = GUI::Window.new(img[:title])
w.show(img[:image])
w.move(pos)
pos.x += img[:image].width
if pos.x > 800
pos.y += img[:image].height
pos.x = 0
end
}
GUI::wait_key
GUI::Window::destroy_all
end
def hash_img(img)
# Compute a hash for an image, useful for image comparisons
Digest::MD5.hexdigest(img.data)
end
unless Test::Unit::TestCase.instance_methods.map {|m| m.to_sym }.include? :assert_false
def assert_false(actual, message = nil)
assert_equal(false, actual, message)
end
end
alias original_assert_in_delta assert_in_delta
def assert_cvscalar_equal(expected, actual, message = nil)
assert_equal(CvScalar, actual.class, message)
assert_array_equal(expected.to_ary, actual.to_ary, message)
end
def assert_array_equal(expected, actual, message = nil)
assert_equal(expected.size, actual.size, message)
expected.zip(actual) { |e, a|
assert_equal(e, a, message)
}
end
def assert_in_delta(expected, actual, delta)
if expected.is_a? CvScalar or actual.is_a? CvScalar
expected = expected.to_ary if expected.is_a? CvScalar
actual = actual.to_ary if actual.is_a? CvScalar
assert_in_delta(expected, actual ,delta)
elsif expected.is_a? Array and actual.is_a? Array
assert_equal(expected.size, actual.size)
expected.zip(actual) { |e, a|
original_assert_in_delta(e, a, delta)
}
else
original_assert_in_delta(expected, actual, delta)
end
end
def create_cvmat(height, width, depth = :cv8u, channel = 4, &block)
m = CvMat.new(height, width, depth, channel)
block = lambda { |j, i, c| CvScalar.new(*([c + 1] * channel)) } unless block_given?
count = 0
height.times { |j|
width.times { |i|
m[j, i] = block.call(j, i, count)
count += 1
}
}
m
end
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def create_iplimage(width, height, depth = :cv8u, channel = 4, &block)
m = IplImage.new(width, height, depth, channel)
block = lambda { |j, i, c| CvScalar.new(*([c + 1] * channel)) } unless block_given?
count = 0
height.times { |j|
width.times { |i|
m[j, i] = block.call(j, i, count)
count += 1
}
}
m
end
def assert_each_cvscalar(actual, delta = 0, &block)
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raise unless block_given?
count = 0
actual.height.times { |j|
actual.width.times { |i|
expected = block.call(j, i, count)
if delta == 0
expected = expected.to_ary if expected.is_a? CvScalar
assert_array_equal(expected, actual[j, i].to_ary)
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else
assert_in_delta(expected, actual[j, i], delta)
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end
count += 1
}
}
end
def print_cvmat(mat)
s = []
mat.height.times { |j|
a = []
mat.width.times { |i|
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tmp = mat[j, i].to_ary.map {|m| m.to_f.round(2) }.join(',')
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a << "[#{tmp}]"
}
s << a.join(' ')
}
puts s.join("\n")
end
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def count_threshold(mat, threshold, &block)
n = 0
block = lambda { |a, b| a > b } unless block_given?
(mat.rows * mat.cols).times { |i|
n += 1 if block.call(mat[i][0], threshold)
}
n
end
end