Class: MnistDigit

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

Instance Method Summary collapse

Constructor Details

#initialize(label, pixels) ⇒ MnistDigit

Returns a new instance of MnistDigit.



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# File 'lib/mnist_digit.rb', line 4

def initialize(label, pixels)
  @label = label
  @pixels = pixels
end

Instance Method Details

#ascii_image ⇒ Object 



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# File 'lib/mnist_digit.rb', line 23

def ascii_image
  img = ""
  pixels.each_with_index do |value, index|
    img += "\n" if index > 0 and index % 28 == 0
    img += gray(value)
  end
  img_array = img.split("\n")
  new_img_array = []
  found = false
  img_array.each do |line|
    next if !found and line.strip.empty?
    found = true
    new_img_array.push(line)
  end
  found = false
  new_img_array2 = []
  new_img_array.reverse.each do |line|
    next if !found and line.strip.empty?
    found = true
    new_img_array2.push(line)
  end
  
  img =  " ____________________________ \n"
  img += "|            #{label}               |\n"
  
  img += "|----------------------------|\n"
  img += "|                            |\n"
  
  new_img_array2.reverse.each do |line|
    img += "|#{line}|\n"
  end
  
  img += "|____________________________|\n"
  
end

#label ⇒ Object 



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# File 'lib/mnist_digit.rb', line 9

def label 
  @label
end

#pixel_image(no_zeros = false) ⇒ Object 



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# File 'lib/mnist_digit.rb', line 59

def pixel_image(no_zeros = false)
  img =  " _________________________________________________________________________________________________________________ \n"
  img += "|                                                  #{label}                                                              |\n"
  img += "|-----------------------------------------------------------------------------------------------------------------|\n"
  
  pixels.each_slice(28).to_a.each do |array|
    img += "| %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d %3d |\n" % array
  end
  
  img +=  "|_________________________________________________________________________________________________________________|\n"
  
  if not no_zeros
    img
  else
    img.gsub(/ 0 /, "   ")
  end
end

#pixels ⇒ Object 



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# File 'lib/mnist_digit.rb', line 13

def pixels
  @pixels
end

#png_image(white_background = false) ⇒ Object 



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# File 'lib/mnist_digit.rb', line 17

def png_image(white_background = false)
  require_relative 'draw_image.rb'
  puts
  DrawImage.draw(pixels, white_background)
end