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etlcdb Skip to content Home About Download Contact Specifications of ETL4 Summary ETL4 is a dataset of handwritten character images of 51 Hiragana characters made from OCR sheets collected at Nagoya University which were scanned at Electrotechnical Laboratory with the TOSBAC-3400 scanning system in 1974 (S49) FY. Data Collection OCR Sheet (Same as the ETL1) Sheet: B5, 90kg per 1000 sheets Dropout color: No.26 Violet 50% Screen（DNP） Frame size (width x height): 5mm x 7mm Frame pitch (width x height): 7.62mm x 12.7mm Number of frames: 10 x 12 = 120 Characters Hiragana: 51（あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやいゆえよらりるれろわゐうゑをん） Data Collection Location: Nagoya University Instructions: 手書文字読取用紙記入上のお願い Templates: given Number of writers: 120 Number of samples: 6,120 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 diameter: 0.1333mm Intensity levels: 16 (4bit) Number of pixels: 72 x 76 = 5,472 pixels Compilation Location: Electrotechnical Laboratory (ETL) Computer : TOSBAC-3400/41 Software: FSSTOMT Date of Compilation: Dec. 1974 Date of Scanning: Dec. 1974 Format C-Type Data Format (ETL3, ETL4, ETL5) Fixed Record Length without Control Words Logical record length is 3936 bytes (6 bits / byte) or 2952 octets (1 octet = 8 bits) Big endian File formats and sample script Sample metadata image 0 Serial Data Number: 500100 Serial Sheet Number: 5001 JIS Code: 0xb1 EBCDIC Code: 0x81 4 Character Code: H A Evaluation of Individual Character Image: 0 Evaluation of Character Group: 0 Sample Position Y on Sheet: 1 Sample Position X on Sheet: 0 Male-Female Code: 1 Age of Writer: 23 Industry Classification Code: 9144 Occupation Classifiaction Code: 11 Sheet Gatherring Date: 741202 Scanning Date: 741216 Number of X-Axis Sampling Points: 72 Number of Y-Axis Sampling Points: 76 Number of Levels of Pixel: 16 Magnification of Scanning Lens: 133 Serial Data Number (old): 0 Language: English 日本語 Iconic One Theme | Powered by Wordpress