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Communication Dans Un Congrès Année : 2021

Vectorization of historical maps using deep edge filtering and closed shape extraction

Résumé

Maps have been a unique source of knowledge for centuries. Such historical documents provide invaluable information for analyzing the complex spatial transformation of landscapes over important time frames. This is particularly true for urban areas that encompass multiple interleaved research domains (social sciences, economy, etc.). The large amount and significant diversity of map sources call for automatic image processing techniques in order to extract the relevant objects under a vectorial shape. The complexity of maps (text, noise, digiti-zation artifacts, etc.) has hindered the capacity of proposing a versatile and efficient raster-to-vector approaches for decades. We propose alearnable, reproducible, and reusable solution for the automatic transformation of raster maps into vector objects (building blocks, streets,rivers). It is built upon the complementary strength of mathematical morphology and convolutional neural networks through efficient edge filtering. Even more, we modify ConnNet and combine with deep edgefiltering architecture to make use of pixel connectivity information and built an end-to-end system without requiring any post-processing techniques. In this paper, we focus on the comprehensive benchmark on various architectures on multiple datasets coupled with a novel vectorization step. Our experimental results on a new public dataset using COCO Panoptic metric exhibit very encouraging results confirmedby a qualitative analysis of the success and failure cases of our approach. Code, dataset, results and extra illustrations are freely available at https://github.com/soduco/ICDAR-2021-Vectorization
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Dates et versions

hal-03256073 , version 1 (10-06-2021)

Identifiants

Citer

Yizi Chen, Edwin Carlinet, Joseph Chazalon, Clément Mallet, Bertrand Dumenieu, et al.. Vectorization of historical maps using deep edge filtering and closed shape extraction. 16th International Conference on Document Analysis and Recognition (ICDAR'21), Sep 2021, Lausanne, Switzerland. pp.510-525, ⟨10.1007/978-3-030-86337-1_34⟩. ⟨hal-03256073⟩
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