Class: ColorExtract::Analytics

Inherits:
Object
  • Object
show all
Includes:
ColorUtil
Defined in:
lib/color_extract/analytics.rb

Overview

Public: 分析图片的色彩信息，相似的颜色会合并在一起

Example:

img = "http://distilleryimage2...jpg"
colors = ColorExtract::Analytics.new( img ).valuable_colors
colors.each do |percent, color|
  puts "#{color.html} : #{percent}"
end

Constant Summary

Constants included from ColorUtil

ColorUtil::K, ColorUtil::X, ColorUtil::Y, ColorUtil::Z

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ColorUtil

#darken, #darken!, #dither, #hue_similarity, #lighten, #lighten!, #pure, #readable_textcolor, #reverse_color, #rgb2lab, #rgb_xyz, #similarity, #xyz_lab

Constructor Details

#initialize(img) ⇒ Analytics

Returns a new instance of Analytics.



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# File 'lib/color_extract/analytics.rb', line 22

def initialize( img )
  @img = img
end

Instance Attribute Details

#merge_factor ⇒ Object (readonly)

Returns the value of attribute merge_factor.



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# File 'lib/color_extract/analytics.rb', line 20

def merge_factor
  @merge_factor
end

Instance Method Details

#valuable_colors(merge_factor: 5) ⇒ Object

Public: 获取颜色数组

  • merge_factor: 颜色合并系数，数字越大，相似的颜色越容易被合并在一起

Returns 颜色数组，数组的每个元素都是 [percent, color] 结构



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# File 'lib/color_extract/analytics.rb', line 31

def valuable_colors( merge_factor: 5 )
  @merge_factor = merge_factor
  @colors ||= calc_valuable_colors
end

#visible_colors ⇒ Object

Public: 获取可见的颜色，这里的颜色是没有经过相似合并的

Returns 可见颜色数组，数组每个元素都是 [percent, color] 结构



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# File 'lib/color_extract/analytics.rb', line 65

def visible_colors
  Colorscore::Histogram.new( @img, MAX_VISIBLE_COLORS).scores.reject do |per, color|
    # 由于不知道的原因（待查），colorscore 返回的队列中
    # 有些颜色是 nil， 这些应该去除，以免影响后续计算。
    color.nil?
  end
end