eprintid: 20244
rev_number: 18
eprint_status: archive
userid: 90
dir: disk0/00/02/02/44
datestamp: 2016-02-10 13:32:08
lastmod: 2016-03-29 13:18:52
status_changed: 2016-02-10 13:32:08
type: conferenceObject
metadata_visibility: show
creators_name: Massa, Judith
creators_name: Bogacz, Bartosz
creators_name: Krömker, Susanne
creators_name: Mara, Hubert
title: Cuneiform Detection in Vectorized Raster Images
subjects: ddc-004
subjects: ddc-090
subjects: ddc-490
subjects: ddc-760
divisions: i-110300
divisions: i-70800
divisions: i-708000
divisions: i-741030
pres_type: paper
abstract: Documents written in cuneiform script are one of the largest sources about ancient history. The script is written by imprinting wedges (Latin: cunei) into clay tablets and was used for almost four millennia. This three-dimensional script is typically transcribed by hand with ink on paper. These transcriptions are available in large quantities as raster graphics by online sources like the Cuneiform Database Library Initative (CDLI). Within this article we present an approach to extract Scalable Vector Graphics (SVG) in 2D from raster images as we previously did from 3D models. This enlarges our basis of data sets for tasks like word-spotting. In the first step of vectorizing the raster images we extract smooth outlines and a minimal graph representation of sets of wedges, i.e., main components of cuneiform characters. Then we discretize these outlines followed by a Delaunay triangulation to extract skeletons of sets of connected wedges. To separate the sets into single wedges we experimented with different conflict resolution strategies and candidate pruning. A thorough evaluation of our methods and its parameters on real word data shows that the wedges are extracted with a true positive rate of 0.98. At the same time the false positive rate is 0.2, which requires future extension by using statistics about geometric configurations of wedge sets.
date: 2016-02-03
id_scheme: DOI
id_number: 10.11588/heidok.00020244
ppn_swb: 1656008858
own_urn: urn:nbn:de:bsz:16-heidok-202444
language: eng
bibsort: MASSAJUDITCUNEIFORMD20160203
full_text_status: public
event_title: 21th Computer Vision Winter Workshop (CVWW'16)
event_location: Rimske Toplice, Slovenia
event_dates: 3-5. Feb. 2016
citation:   Massa, Judith ; Bogacz, Bartosz ; Krömker, Susanne ; Mara, Hubert  (2016) Cuneiform Detection in Vectorized Raster Images.  [Conference Item]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/20244/1/cvww16_massa_bogacz_kroemker_mara_final_submitted.pdf