Module: DNN::CIFAR10

Defined in:
lib/dnn/datasets/cifar10.rb

Defined Under Namespace

Classes: DNN_CIFAR10_LoadError

Class Method Summary collapse

Class Method Details

.downloads ⇒ Object 



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# File 'lib/dnn/datasets/cifar10.rb', line 12

def self.downloads
  return if Dir.exist?(DOWNLOADS_PATH + "/downloads/" + DIR_CIFAR10)
  Downloader.download(URL_CIFAR10)
  cifar10_binary_file_name = DOWNLOADS_PATH + "/downloads/" + URL_CIFAR10.match(%r`.+/(.+)`)[1]
  begin
    Zlib::GzipReader.open(cifar10_binary_file_name) do |gz|
      Archive::Tar::Minitar.unpack(gz, DOWNLOADS_PATH + "/downloads")
    end
  ensure
    File.unlink(cifar10_binary_file_name)
  end
end

.load_test ⇒ Object

Raises:



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# File 'lib/dnn/datasets/cifar10.rb', line 40

def self.load_test
  downloads
  fname = DOWNLOADS_PATH + "/downloads/#{DIR_CIFAR10}/test_batch.bin"
  raise DNN_CIFAR10_LoadError, %`file "#{fname}" is not found.` unless File.exist?(fname)
  bin = File.binread(fname)
  datas = Numo::UInt8.from_binary(bin).reshape(10000, 3073)
  x_test = datas[true, 1...3073]
  x_test = x_test.reshape(10000, 3, 32, 32).transpose(0, 2, 3, 1).clone
  y_test = datas[true, 0]
  [x_test, y_test]
end

.load_train ⇒ Object 



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# File 'lib/dnn/datasets/cifar10.rb', line 25

def self.load_train
  downloads
  bin = ""
  (1..5).each do |i|
    fname = DOWNLOADS_PATH + "/downloads/#{DIR_CIFAR10}/data_batch_#{i}.bin"
    raise DNN_CIFAR10_LoadError, %`file "#{fname}" is not found.` unless File.exist?(fname)
    bin << File.binread(fname)
  end
  datas = Numo::UInt8.from_binary(bin).reshape(50000, 3073)
  x_train = datas[true, 1...3073]
  x_train = x_train.reshape(50000, 3, 32, 32).transpose(0, 2, 3, 1).clone
  y_train = datas[true, 0]
  [x_train, y_train]
end