Module: NonStructuralFeature

Included in:
KvgCharacterRecognition::HeatmapFeature
Defined in:
lib/kvg_character_recognition/non_structural_feature.rb

Defined Under Namespace

Classes: Map

Instance Method Summary collapse

Instance Method Details

#smooth(map) ⇒ Object 



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# File 'lib/kvg_character_recognition/non_structural_feature.rb', line 40

def smooth map
  new_map = Map.new(@number_of_grids, @number_of_grids, map.initial_value)

  (0..(@number_of_grids - 1)).each do |i|
    (0..(@number_of_grids - 1)).each do |j|
      #weights alternative 
      #        = [1/16, 2/16, 1/16];
      #          [2/16, 4/16, 2/16];
      #          [1/16, 2/16, 1/16]
      #
      #weights = [1/9, 1/9, 1/9];
      #          [1/9, 1/9, 1/9];
      #          [1/9, 1/9, 1/9]
      #
      w11 = (0..(@number_of_grids-1)).cover?(i+1) && (0..(@number_of_grids-1)).cover?(j-1)? map[i+1,j-1].map{|e| e * @weights[0]} : [0, 0, 0]
      w12 = (0..(@number_of_grids-1)).cover?(i+1) && (0..(@number_of_grids-1)).cover?(j)? map[i+1,j].map{|e| e * @weights[1]} : [0, 0, 0]
      w13 = (0..(@number_of_grids-1)).cover?(i+1) && (0..(@number_of_grids-1)).cover?(j+1)? map[i+1,j+1].map{|e| e * @weights[2]} : [0, 0, 0]
      w21 = (0..(@number_of_grids-1)).cover?(i) && (0..(@number_of_grids-1)).cover?(j-1)? map[i,j-1].map{|e| e * @weights[3]} : [0, 0, 0]
      w22 = (0..(@number_of_grids-1)).cover?(i) && (0..(@number_of_grids-1)).cover?(j)? map[i,j].map{|e| e * @weights[4]} : [0, 0, 0]
      w23 = (0..(@number_of_grids-1)).cover?(i) && (0..(@number_of_grids-1)).cover?(j+1)? map[i,j+1].map{|e| e * @weights[5]} : [0, 0, 0]
      w31 = (0..(@number_of_grids-1)).cover?(i-1) && (0..(@number_of_grids-1)).cover?(j-1)? map[i-1,j-1].map{|e| e * @weights[6]} : [0, 0, 0]
      w32 = (0..(@number_of_grids-1)).cover?(i-1) && (0..(@number_of_grids-1)).cover?(j)? map[i-1,j].map{|e| e * @weights[7]} : [0, 0, 0]
      w33 = (0..(@number_of_grids-1)).cover?(i-1) && (0..(@number_of_grids-1)).cover?(j+1)? map[i-1,j+1].map{|e| e * @weights[8]} : [0, 0, 0]

      new_map[i,j] = [(w11[0] + w12[0] + w13[0] + w21[0] + w22[0] + w23[0] + w31[0] + w32[0] + w33[0]).round(3),
                      (w11[1] + w12[1] + w13[1] + w21[1] + w22[1] + w23[1] + w31[1] + w32[1] + w33[1]).round(3),
                      (w11[2] + w12[2] + w13[2] + w21[2] + w22[2] + w23[2] + w31[2] + w32[2] + w33[2]).round(3)]
    end
  end

  new_map
end