Contents

# frozen_string_literal: true

class Map::Gdal::ConstrastStretchService
  include Map::Gdal::Base

  attr_reader :file
  def initialize(file)
    raise 'File does not exist' unless File.exist?(file)
    @file = file
  end

  def call(options = {})
    file_out = get_path_to_temp_file(:gdal_contrast_stretch, :tif)
    add_to_clean(file_out)

    options['percentile-range'] = '0.02 0.98' if options.empty?

    result = run_command(%{gdal_contrast_stretch #{options_to_command_line(options)} "#{file}" "#{file_out}"})
    found_min_max = result.match(/src_range=\[(.+), (.+)\]/)
    {
      file: file_out,
      min: found_min_max[1].to_f,
      max: found_min_max[2].to_f,
    }
  end
end

Version data entries

8 entries across 8 versions & 1 rubygems

Version	Path
aqila-mapas-0.4.12	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.11	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.9	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.8	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.7	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.6	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.5	lib/map/gdal/contrast_stretch_service.rb
aqila-mapas-0.4.4	lib/map/gdal/contrast_stretch_service.rb