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research article

Evaluating Shape Representations for Maya Glyph Classification

Can, Gulcan
•
Odobez, Jean-Marc  
•
Gatica-Perez, Daniel  
2016
ACM Journal on Computing and Cultural Heritage

Shape representations are critical for visual analysis of cultural heritage materials. This article studies two types of shape representations in a bag-of-words-based pipeline to recognize Maya glyphs. The first is a knowledge-driven Histogram of Orientation Shape Context (HOOSC) representation, and the second is a data-driven representation obtained by applying an unsupervised Sparse Autoencoder (SA). In addition to the glyph data, the generalization ability of the descriptors is investigated on a larger-scale sketch dataset. The contributions of this article are four-fold: (1) the evaluation of the performance of a data-driven auto-encoder approach for shape representation; (2) a comparative study of hand-designed HOOSC and data-driven SA; (3) an experimental protocol to assess the effect of the different parameters of both representations; and (4) bridging humanities and computer vision/machine learning for Maya studies, specifically for visual analysis of glyphs. From our experiments, the data-driven representation performs overall in par with the hand-designed representation for similar locality sizes on which the descriptor is computed. We also observe that a larger number of hidden units, the use of average pooling, and a larger training data size in the SA representation all improved the descriptor performance. Additionally, the characteristics of the data and stroke size play an important role in the learned representation.

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Type
research article
DOI
10.1145/2905369
Web of Science ID

WOS:000388852400003

Author(s)
Can, Gulcan
Odobez, Jean-Marc  
Gatica-Perez, Daniel  
Date Issued

2016

Published in
ACM Journal on Computing and Cultural Heritage
Volume

9

Issue

3

Start page

14

Subjects

HOOSC

•

sparse autoencoder

•

sketch

•

Maya glyph

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIDIAP  
Available on Infoscience
December 19, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/121835
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