Specification of ETL-1

OCR Sheet

  • e1shtSheet: B5, 90kg per 1000 sheets
  • Dropout color: No.26 Violet 50% Screen(DNP)
  • Frame size: 5mm x 7mm
  • Pitch: 7.62mm x 12.7mm
  • Number of frames: 10 x 12 = 120

Characters

  • Numeric: 10 (0-9)
  • Capital Roman alphabet: 26 (A-Z)
  • Special: 12 (\+-*/=()・,?’)
  • Katakana: 51 (ア-ン)
  • Total: 99

Data Collection

Scanning System

  • Scanner: Flying Spot Scanner (FSS) with a Flying Spot Cathode Ray Tube 5CNP16 and a Photomultiplier Tube 7696
  • Interval: 0.133mm x 0.133mm
  • Spot size: 0.1333mm
  • Intensity levels: 16 (4bit)
  • Number of pixels: 72 x 76, cut out to 64 x 63

Compiling

  • Place: Electrotechnical Laboratory (ETL)
  • Joint work of ETL and Fujitsu for design of OCR sheet and scanning system
  • Computer : TOSBAC-3400/41
  • Software: FSSTOMT
  • Date of Collection: Sept. 1973
  • Date of Scanning: Sept. 1973-Mar. 1974
  • Quality evaluation by human
  • 141319 samples in total

Format

Contents

Contents of files:

Filename Categories # Categories Sheets # Sheets # Records
ETL1C-01 01234567 8 1001-2960 1445 11560
ETL1C-02 89ABCDEF 8 1001-2960 1445 11560
ETL1C-03 GHIJKLMN 8 1001-2960 1445 11560
ETL1C-04 OPQRSTUV 8 1001-2960 1445 11560
ETL1C-05 WXYZ\+-* 8 1001-2960 1445 11560
ETL1C-06 /=()・,?’ 8 1001-2960 1445 11560
ETL1C-07 アイウエオカキク 8 1001-2960 1411 11288
ETL1C-08 ケコサシスセソタ 8 1001-2960 1411 11288
ETL1C-09 チツテトナニヌネ 8 1001-2960 1411 11287 note: ナ(NA) on Sheet 2672 is missing
ETL1C-10 ノハヒフヘホマミ 8 1001-2960 1411 11288
ETL1C-11 ムメモヤイユエヨ 8 1001-2960 1411 11288
ETL1C-12 ラリルレロワヰウ 8 1001-2960 1411 11287 note: リ(RI) on Sheet 2708 is missing
ETL1C-13 ヱヲン 3 1001-2960 1411 4233

List of available sheets:

1001-1026 1028-1149 1151-1243 1301-1306 1308-1316 1318-1355 1357 1360-1391 1393-1436 1438-1453 1455-1459 1461-1491 1501-1525 1527-1658 1660-1663 1665 1667-1695 1701-1766 1801-1837 1839-1884 2001-2019 2021-2025 2027-2153 2201-2391 2501-2696 2701-2744 2801-2802 *2803-2812 2813 *2814 2815-2817 *2818-2840 2901-2960 *: Katakana characters are missing

Samples

First ten samples (0: white, 15: black):