/HTR_Araucania_XIX

Ground Truth dataset for Spanish 19th typewritten OCR.

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HTR - Araucania manuscript XIXe

Ground Truth dataset for Spanish 19th typewritten OCR.

The archives come from the events of the Occupation of Araucania (1850-1881) in Chile. They are archived in the 'Colección manuscritos' of the Archivo Central Andres Bello - Universidad de Chile.

Thereby, it is not possible to publicly distribute the images (.jpg)

To use them for segmentation/recognition model training, please contact me : archivo.central@uchile.cl

Dataset

Name Pages Extreme dates Description Test Data
Cornelio Saavedra 43 11/1859 – 08/1877 clean style, good condition, presence of postscript notes N
Avello, Juan 12 11/1859 – 11/1860 clean style, some sheets damaged, presence of post-scriptum notes N
Diaz, José Del Carmen 21 12/1859 – 03/1860 clean style sometimes condensed, good condition N
Escala, Manuel Segundo 13 11/1859 – 11/1860 very clean style, good condition N
Garcia Videla, Daniel 8 05/1860 – 06/1860 very clean style, good condition N
Pérez Rosales, Vicente 12 02/1860 – 11/1860 sometimes hesitant and condensed style, good condition N
Sepulveda, José 8 12/1859 – 11/1860 intermediate style, some damaged leaves, presence of post-scriptum notes Y
Villalon, Vicente 22 11/1859 – 11/1859 clean style, sometimes erased, presence of post-scriptum notes N
Contreras, Juan 16 03/1860 – 06/1860 decent style, some leaves slightly damaged N
random data 23 11/1859 – 11/1859 16 hands, good condition N

Methodology

Transcription rules :

  • xxx for blurred or unreadable characters
  • ^+letters for superscript letters
  • ⁋ for new paragraph

Using the Kraken OCR engine in finetuning with the Menu_MacFrench template. A template uses the NFKD method.

Evaluation

Name Quantity (GT) Val_acc Test_acc CER WER
HTR-Araucania_XIX 180 0,90354 0,8673 0,05598 0,21423
HTR-Araucania_XIX_NFKD 180 0,89872 0,8563 0,06646 0.24963

Others

JSONL file for NER annotation in ner/ (MISC, LOC, PERS, ORG, DATE)

How to cite

name: 'AraucaniaCorpus'
url: 'https://github.com/Proyecto-Ocupacion-Araucania-UChile/HTR_Araucania_XIX'
author: 'Maxime Humeau', 'Alessandro Chiaretti'
month: 'september'
year: '2022'
version: '{any version}'
description: 'Ground Truth dataset for Spanish 19th typewritten OCR'
language: 'Spanish'
time: '1859-1877'
hands: ''
license:
    - {name: 'CC BY-NC-SA 4.0', url: 'https://creativecommons.org/licenses/by-nc-sa/4.0/'}
format: 'ALTO'
volume:
    - {count: "180", metric: pages}

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

CC BY-NC-SA 4.0