Class: Quadtone::Target

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params = {}) ⇒ Target

Returns a new instance of Target.



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# File 'lib/quadtone/target.rb', line 12

def initialize(params={})
  params.each { |k, v| send("#{k}=", v) }
  raise "Base directory must be specified" unless @base_dir
  raise "Channels must be specified" unless @channels
  raise "Type must be specified" unless @type
  raise "Name must be specified" unless @name
end

Instance Attribute Details

#base_dir ⇒ Object

Returns the value of attribute base_dir.



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

def base_dir
  @base_dir
end

#channels ⇒ Object

Returns the value of attribute channels.



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# File 'lib/quadtone/target.rb', line 6

def channels
  @channels
end

#ink_limits ⇒ Object

Returns the value of attribute ink_limits.



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# File 'lib/quadtone/target.rb', line 9

def ink_limits
  @ink_limits
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/quadtone/target.rb', line 8

def name
  @name
end

#samples ⇒ Object

Returns the value of attribute samples.



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# File 'lib/quadtone/target.rb', line 10

def samples
  @samples
end

#type ⇒ Object

Returns the value of attribute type.



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

def type
  @type
end

Instance Method Details

#base_file(channel = nil, n = nil) ⇒ Object

private



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# File 'lib/quadtone/target.rb', line 214

def base_file(channel=nil, n=nil)
  @base_dir / (@name.to_s + (channel ? "-#{channel}" : '') + (n ? "-#{n}" : ''))
end

#build ⇒ Object 



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# File 'lib/quadtone/target.rb', line 20

def build
  ;;warn "Making target for channels #{@channels.inspect}"
  cleanup_files(:all)

  resolution = 360
  page_size = HashStruct.new(width: 8, height: 10.5)
  # total_patches = 42
  ;;total_patches = 14
  patches_per_row = 14
  total_rows = total_patches / patches_per_row
  row_height = 165
  target_size = [
    ((total_rows + 1) * row_height).to_f / resolution,
    page_size.height,
  ].map { |n| (n * 25.4).to_i }.join('x')

  image_list = Magick::ImageList.new
  @channels.each do |channel|
    sub_path = base_file(channel)
    sub_image_path = image_file(channel)
    ;;warn "Making target #{sub_path.inspect} at #{sub_image_path}"
    Quadtone.run('targen',
      # '-v',                 # Verbose mode [optional level 1..N]
      '-d', 0,              # generate grayscale target
      '-e', 0,              # White test patches (default 4)
      '-B', 0,              # Black test patches (default 4 Grey/RGB, else 0)
      '-s', total_patches,  # Single channel steps (default grey 50, color 0)
      sub_path)
    Quadtone.run('printtarg',
      # '-v',                 # Verbose mode [optional level 1..N]
      '-a', 1.45,           # Scale patch size and spacers by factor (e.g. 0.857 or 1.5 etc.)
      '-r',                 # Don't randomize patch location
      '-i', 'i1',           # set instrument to EyeOne (FIXME: make configurable)
      '-t', resolution,     # generate 16-bit TIFF @ 360 ppi
      '-m', 0,              # Set a page margin in mm (default 6.0 mm)
      '-L',                 # Suppress any left paper clip border
      '-p', target_size,    # Select page size
      sub_path)
    image = Magick::Image.read(sub_image_path).first
    # image.background_color = 'transparent'
    # image = image.transparent('white')
    case @type
    when :characterization
      if @ink_limits && (limit = @ink_limits[channel]) && limit != 1
        ;;warn "\t" + "#{channel.to_s.upcase}: Applying limit of #{limit}"
        levels = [1.0 - limit, 1.0].map { |n| n * Magick::QuantumRange }
        image = image.levelize_channel(*levels)
      end
      # calculate a black RGB pixel for this channel in QTR calibration mode
      black_qtr = Color::QTR.new(channel: channel, value: 0)
      black_rgb = black_qtr.to_rgb
      ;;warn "\t" + "#{channel.to_s.upcase}: Colorizing to #{black_rgb}"
      image = image.colorize(1, 0, 1, black_rgb.to_pixel)
    end
    image_list << image
  end

  if @type == :linearization || @type == :test

    width = (page_size.width * resolution).to_i - image_list.first.columns
    height = page_size.height * resolution

    ;;width = (page_size.width / 2) * resolution

    linear_scale_height = 1 * resolution
    radial_scale_height = (height - linear_scale_height) / 2
    sample_image_height = (height - linear_scale_height) / 2

    test_images = Magick::ImageList.new
    test_images << linear_gradation_scale_image([width, linear_scale_height])
    test_images << radial_gradation_scale_image([width, radial_scale_height])
    test_images << sample_image([width, sample_image_height])
    image_list << test_images.append(true)
  end

  # ;;warn "montaging images"
  # image_list = image_list.montage do
  #   self.geometry = Magick::Geometry.new(page_size.width * resolution, page_size.height * resolution)
  #   self.tile = Magick::Geometry.new(image_list.length, 1)
  # end

  # ;;warn "writing target image"
  # image_list.write(image_file) do
  #   self.depth = (@type == :characterization) ? 8 : 16
  #   self.compression = Magick::ZipCompression
  # end

  ;;warn "writing target image"
  image_list.append(false).write(image_file) do
    self.depth = (@type == :characterization) ? 8 : 16
    self.compression = Magick::ZipCompression
  end

end

#cleanup_files(files) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 254

def cleanup_files(files)
  ;;warn "deleting files: #{files.inspect}"
  files = [files].flatten
  until files.empty?
    file = files.shift
    case file
    when :all
      files << :ti
      files += image_files
    when :ti
      files += ti_files
    when Path
      if file.exist?
        # ;;warn "\t" + file
        file.unlink
      end
    else
      raise "Unknown file to cleanup: #{file}"
    end
  end
end

#image_file(channel = nil) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 230

def image_file(channel=nil)
  base_file(channel).with_extname('.tif')
end

#image_files ⇒ Object 



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# File 'lib/quadtone/target.rb', line 250

def image_files
  Path.glob(base_file.with_extname('*.tif'))
end

#linear_gradation_scale_image(size) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 115

def linear_gradation_scale_image(size)
  ;;warn "\t" + "generating linear gradation scale of size #{size.inspect}"
  bounds = Magick::Rectangle.new(*size, 0, 0)
  image1 = Magick::Image.new(bounds.width, bounds.height/2, Magick::GradientFill.new(0, 0, 0, bounds.height/2, 'white', 'black'))
  image2 = image1.posterize(21)
  image3 = image1.posterize(256)
  ilist = Magick::ImageList.new
  ilist << image1
  ilist << image2
  ilist << image3
  ilist.append(true)
end

#measure(options = {}) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 147

def measure(options={})
  options = HashStruct.new(options)
  channels_to_measure = options.channels || @channels
  channels_to_measure.each_with_index do |channel, i|
    measure_channel(channel, options.merge(disable_calibration: i > 0))
  end
end

#measure_channel(channel, options = HashStruct.new) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 155

def measure_channel(channel, options=HashStruct.new)
  options = HashStruct.new(options)
  if options.remeasure
    pass = options.remeasure
  else
    pass = ti2_files(channel).length
  end
  base = base_file(channel, pass)
  FileUtils.cp(ti2_file(channel), base.with_extname('.ti2')) unless options.remeasure
  ;;warn "Measuring target #{base.inspect}"
  Quadtone.run('chartread',
    # '-v',                             # Verbose mode [optional level 1..N]
    '-p',                             # Measure patch by patch rather than strip
    '-n',                             # Don't save spectral information (default saves spectral)
    '-l',                             # Save CIE as D50 L*a*b* rather than XYZ
    options.disable_calibration ? '-N' : nil, # Disable initial calibration of instrument if possible
    options.remeasure ? '-r' : nil,   # Resume reading partly read chart
    base)
end

#radial_gradation_scale_image(size) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 128

def radial_gradation_scale_image(size)
  ;;warn "\t" + "generating radial gradation scale of size #{size.inspect}"
  bounds = Magick::Rectangle.new(*size, 0, 0)
  image1 = Magick::Image.new(bounds.width, bounds.height/2, Magick::GradientFill.new(bounds.width/2, bounds.height/2, bounds.width/2, bounds.height/2, 'black', 'white'))
  image2 = image1.posterize(21).flip
  ilist = Magick::ImageList.new
  ilist << image1
  ilist << image2
  ilist.append(true)
end

#read ⇒ Object 



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# File 'lib/quadtone/target.rb', line 175

def read
  ;;warn "reading samples for #{@channels.join(', ')} from CGATS files"
  @samples = {}
  @channels.each do |channel|
    samples = {}
    ti3_files(channel).map do |file|
      ;;warn "reading #{file}"
      cgats = CGATS.new_from_file(file)
      cgats.sections.first.data.each do |set|
        id = set['SAMPLE_LOC'].gsub(/"/, '')
        samples[id] ||= []
        samples[id] << Sample.new(input: Color::Gray.from_cgats(set), output: Color::Lab.from_cgats(set))
      end
    end
    @samples[channel] = samples.map do |id, samples|
      cc = ClusterCalculator.new(samples: samples, max_clusters: samples.length > 2 ? 2 : 1)
      cc.cluster!
      clusters = cc.clusters.sort_by(&:size).reverse
      # ;;warn "Clusters:"
      # clusters.each do |cluster|
      #   warn "\t" + cluster.center.to_s
      #   cluster.samples.each do |sample|
      #     warn "\t\t" + "#{sample.to_s}"
      #   end
      # end
      # ;;
      cluster = clusters.shift
      raise "Too much spread" if cluster.samples.length < 2 && samples.length > 2
      unless clusters.empty?
        warn "Dropped #{clusters.length} out of range sample(s) at patch #{channel}-#{id}"
      end
      output = cluster.center
      Sample.new(input: samples.first.input, output: output, label: "#{channel}-#{id}")
    end
  end
end

#sample_image(size) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 139

def sample_image(size)
  ;;warn "\t" + "generating sample image of size #{size.inspect}"
  bounds = Magick::Rectangle.new(*size, 0, 0)
  file = Path.new(ENV['HOME']) / 'Desktop' / '121213b.01.tif'   #FIXME: parameterize
  ilist = Magick::ImageList.new(file.to_s)
  ilist.first.resize_to_fill(*size)
end

#ti1_file(channel) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 218

def ti1_file(channel)
  base_file(channel).with_extname('.ti1')
end

#ti2_file(channel, n = nil) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 222

def ti2_file(channel, n=nil)
  base_file(channel, n).with_extname('.ti2')
end

#ti2_files(channel) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 242

def ti2_files(channel)
  Path.glob(base_file(channel).with_extname('*.ti2'))
end

#ti3_file(channel, n = nil) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 226

def ti3_file(channel, n=nil)
  base_file(channel, n).with_extname('.ti3')
end

#ti3_files(channel) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 246

def ti3_files(channel)
  Path.glob(base_file(channel).with_extname('*.ti3'))
end

#ti_files ⇒ Object 



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# File 'lib/quadtone/target.rb', line 238

def ti_files
  Path.glob(base_file.with_extname('*.ti[123]'))
end

#values_file(channel = nil) ⇒ Object 



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# File 'lib/quadtone/target.rb', line 234

def values_file(channel=nil)
  base_file(channel).with_extname('.txt')
end