Class: Quadtone::Separator

Inherits:
Object
  • Object
show all
Defined in:
lib/quadtone/separator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(curve_set) ⇒ Separator

Returns a new instance of Separator.



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# File 'lib/quadtone/separator.rb', line 7

def initialize(curve_set)
  @luts = {}
  curve_set.curves.each do |curve|
    color_map = Magick::Image.new(curve.num_samples, 1) do
       self.colorspace = Magick::GRAYColorspace
    end
     color_map.pixel_interpolation_method = Magick::IntegerInterpolatePixel
    color_map.view(0, 0, curve.num_samples, 1) do |view|
       curve.samples.each_with_index do |sample, i|
         value = ((1 - sample.output.value) * 65535).to_i
         view[0][curve.num_samples - 1 - i] = Magick::Pixel.new(value, value, value)
      end
    end
     @luts[curve.channel] = color_map
  end
end

Instance Attribute Details

#luts ⇒ Object

Returns the value of attribute luts.



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# File 'lib/quadtone/separator.rb', line 5

def luts
  @luts
end

Instance Method Details

#separate(image) ⇒ Object 



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# File 'lib/quadtone/separator.rb', line 24

def separate(image)
  images = {}
  @luts.each do |channel, lut|
    image2 = image.copy.clut_channel(lut)
    image2['Label'] = channel.to_s.upcase
    images[channel] = image2
  end
  images
end