Class: Imatcher::Modes::RGB

Inherits:
Base
  • Object
show all
Defined in:
lib/imatcher/modes/rgb.rb

Overview

Compare pixels by values. Resulting image contains per-channel differences.

Instance Attribute Summary

Attributes inherited from Base

#result, #threshold

Instance Method Summary collapse

Methods inherited from Base

#calculate_bounds, #compare, #diff, #initialize, #score

Methods included from ColorMethods

#brightness

Constructor Details

This class inherits a constructor from Imatcher::Modes::Base

Instance Method Details

#background(bg) ⇒ Object 



16
17
18
 
# File 'lib/imatcher/modes/rgb.rb', line 16

def background(bg)
  Image.new(bg.width, bg.height, BLACK)
end

#create_diff_image(bg, diff_image) ⇒ Object 



20
21
22
 
# File 'lib/imatcher/modes/rgb.rb', line 20

def create_diff_image(bg, diff_image)
  bg.to_grayscale.compose!(diff_image, 0, 0)
end

#pixels_diff(d, a, b, x, y) ⇒ Object 



24
25
26
27
28
29
30
 
# File 'lib/imatcher/modes/rgb.rb', line 24

def pixels_diff(d, a, b, x, y)
  d[x, y] = rgb(
    (r(a) - r(b)).abs,
    (g(a) - g(b)).abs,
    (b(a) - b(b)).abs
  )
end

#pixels_equal?(a, b) ⇒ Boolean

Returns:

  • (Boolean) 


8
9
10
 
# File 'lib/imatcher/modes/rgb.rb', line 8

def pixels_equal?(a, b)
  a == b
end

#update_result(a, b, x, y) ⇒ Object 



12
13
14
 
# File 'lib/imatcher/modes/rgb.rb', line 12

def update_result(a, b, x, y)
  @result.diff << [a, b, x, y]
end