RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION

In the restoration of the frescoed vaults it is not only important to know the geometric shape of the painted surface, but it is essential to document its chromatic characterization and conservation status. The new techniques of range-based and image-based modelling, each with its limitations and ad...

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Main Authors: G. Caroti, I. Martínez-Espejo Zaragoza, A. Piemonte
Format: Article
Language:English
Published: Copernicus Publications 2015-02-01
Series:The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Online Access:http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-5-W4/285/2015/isprsarchives-XL-5-W4-285-2015.pdf
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spelling doaj-c72a2f4722d4428189480617a368392a2020-11-24T21:52:00ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342015-02-01XL-5/W428529010.5194/isprsarchives-XL-5-W4-285-2015RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATIONG. Caroti0I. Martínez-Espejo Zaragoza1A. Piemonte2Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lucio Lazzarino 1, 56123 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lucio Lazzarino 1, 56123 Pisa, ItalyDipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lucio Lazzarino 1, 56123 Pisa, ItalyIn the restoration of the frescoed vaults it is not only important to know the geometric shape of the painted surface, but it is essential to document its chromatic characterization and conservation status. The new techniques of range-based and image-based modelling, each with its limitations and advantages, offer a wide range of methods to obtain the geometric shape. In fact, several studies widely document that laser scanning enable obtaining three-dimensional models with high morphological precision. However, the quality level of the colour obtained with built-in laser scanner cameras is not comparable to that obtained for the shape. It is possible to improve the texture quality by means of a dedicated photographic campaign. This procedure, however, requires to calculate the external orientation of each image identifying the control points on it and on the model through a costly step of post processing. With image-based modelling techniques it is possible to obtain models that maintain the colour quality of the original images, but with variable geometric precision, locally lower than the laser scanning model. This paper presents a methodology that uses the camera external orientation parameters calculated by image based modelling techniques to project the same image on the model obtained from the laser scan. This methodology is tested on an Italian mirror (<i>a schifo</i>) frescoed vault. In the paper the different models, the analysis of precision and the efficiency evaluation of proposed methodology are presented.http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-5-W4/285/2015/isprsarchives-XL-5-W4-285-2015.pdf
collection DOAJ
language English
format Article
sources DOAJ
author G. Caroti
I. Martínez-Espejo Zaragoza
A. Piemonte
spellingShingle G. Caroti
I. Martínez-Espejo Zaragoza
A. Piemonte
RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
author_facet G. Caroti
I. Martínez-Espejo Zaragoza
A. Piemonte
author_sort G. Caroti
title RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION
title_short RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION
title_full RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION
title_fullStr RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION
title_full_unstemmed RANGE AND IMAGE BASED MODELLING: A WAY FOR FRESCOED VAULT TEXTURING OPTIMIZATION
title_sort range and image based modelling: a way for frescoed vault texturing optimization
publisher Copernicus Publications
series The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
issn 1682-1750
2194-9034
publishDate 2015-02-01
description In the restoration of the frescoed vaults it is not only important to know the geometric shape of the painted surface, but it is essential to document its chromatic characterization and conservation status. The new techniques of range-based and image-based modelling, each with its limitations and advantages, offer a wide range of methods to obtain the geometric shape. In fact, several studies widely document that laser scanning enable obtaining three-dimensional models with high morphological precision. However, the quality level of the colour obtained with built-in laser scanner cameras is not comparable to that obtained for the shape. It is possible to improve the texture quality by means of a dedicated photographic campaign. This procedure, however, requires to calculate the external orientation of each image identifying the control points on it and on the model through a costly step of post processing. With image-based modelling techniques it is possible to obtain models that maintain the colour quality of the original images, but with variable geometric precision, locally lower than the laser scanning model. This paper presents a methodology that uses the camera external orientation parameters calculated by image based modelling techniques to project the same image on the model obtained from the laser scan. This methodology is tested on an Italian mirror (<i>a schifo</i>) frescoed vault. In the paper the different models, the analysis of precision and the efficiency evaluation of proposed methodology are presented.
url http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-5-W4/285/2015/isprsarchives-XL-5-W4-285-2015.pdf
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