Datasets for Computer Vision (1)

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(1) MNIST(Modified National Institute of Standards and Technology)(1998):

• has the 70,000 handwritten digits[0~9] by 28x28 pixels each. *60,000 for train and 10,000 for test.
• is MNIST() in PyTorch.

(2) EMNIST(Extended MNIST)(2017):

• has the handwritten characters(digits[0~9] and alphabet letters[A~Z][a~z]) by 28x28 pixels each, splitted into 6 datasets(ByClass, ByMerge, Balanced, Letters, Digits and MNIST): *Memos:
  • ByClass has 814,255 characters(digits[0~9] and alphabet letters[A~Z][a~z]). *697,932 for train and 116,323 for test.
  • ByMerge has 814,255 characters(digits[0~9] and alphabet letters[A~Z][a, b, d~h, n, q, r, t]). *697,932 for train and 116,323 for test.
  • Balanced has 131,600 characters(digits[0~9] and alphabet letters[A~Z][a, b, d~h, n, q, r, t]). *112,800 for train and 18,800 for test.
  • Letters has 145,600 alphabet letters[a~z]. *124,800 for train and 20,800 for test.
  • Digits has 280,000 digits[0~9]. *240,000 for train and 40,000 for test.
  • MNIST has 70,000 digits[0~9]. *60,000 for train and 10,000 for test.
• is EMNIST() in PyTorch.

(3) QMNIST(2019):

• has 120,000 handwritten digits[0~9] by 28x28 pixels each. *60,000 for train and 60,000 for test.
• is an extended MNIST. *I don't know what Q of QMNIST means.
• is QMNIST() in PyTorch.

(4) ETLCDB(Extract-Transform-Load Character Database)(2011):

• has the handwritten or machine-printed numerals, symbols, alphabet letters and Japanese characters split into 9 datasets(ETL-1, ETL-2, ETL-3 , ETL-4, ETL-5, ETL-6, ETL-7, ETL-8 and ETL-9) : : : : : : : : : : : : : : : : : : : : : : *Memos:
  • ETL1 has 141,319 characters (digits[0~9], alphabet letters[A~Z], symbols[-*/=()・,?'] and Katakana[ア~ン]).
  • ETL2 has 52,796 characters(digits[0~9], alphabet letters[A~Z], symbols, Katakana letters[ア~ン], Hiragana letters[あ~ん] and Kanji letters).
  • ETL3 has 9,600 characters(digits[0~9], alphabet letters[A~Z] and symbols[¥ -*/=()・,_▾]).
  • ETL4 has 6,120 letters[あ~ん].
  • ETL5 has 10,608 Katakana letters[ア~ン].
  • ETL6 has 52,796 characters (digits[0~9], alphabet letters[A~Z][a~z], symbols and Katakana letters[ア~ン]).
  • ETL7(ETL7L and ETL7S) has 16,800 characters
  • ETL8(ETL8G and ETL8B2) has 152,960 characters
  ETL9(ETL9G and ETL9B)
  • has 607,200 characters
  It's not in PyTorch so we need to download it from etlcdb.

(5) Kuzushiji(2018):

The cursive style of Japanese characters is split into 3 datasets(

Kuzushiji-MNIST

,
• Kuzushiji-49 and Kuzushiji-Kanji): *Memos: Kuzushiji-MNIST
  has 28x28 pixels resolution
  • Kuzushiji-49 has 28x28 pixels each.
  Kuzushiji-49
  • Kuzushiji-Kanji
  has the imbalanced 140,424 Kanji characters by 64x64 pixels each.
  KMNIST() is in PyTorch but it only has
  Kuzushiji-MNIST
🎜>
• (6) Moving MNIST(2015):
has 10,000 videos by 64x64 pixels each. *Each video has 20 frames with 2 moving digits.

MovingMNIST() is in PyTorch.

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