Close Range Photogrammetry & Computer Aided Design for Heritage Sites

Master Thesis at ifp - Karam Mawas

Karam Mawas

Close Range Photogrammetry & Computer Aided Design for Heritage Sites

Duration of the Thesis: 6 months
Completion: April 2017
Supervisor: M.Sc. Chance Coughenour
Supervisor & Examiner: Prof. Dr.-Ing. Norbert Haala


 

Introduction

Monuments due to its valuable of our ancestors allure investigators, researchers, and even tourists. Restoration and monitoring heritages is the key to keep them available through the time. Unfortunately, some of the monuments were demolished because of many factors.

The thesis aims to reconstruct the destructed objects from the available data. Furthermore, propose a solution to enhance the obtained results. The approach done in different steps:  (i) photogrammetry. (ii) Computer Aided Design (CAD). (iii) Texturing.

Data Processing

Two different types of data were used, images and observations from archaeologists.

Crowdsources of images were used in photogrammetry processing. The images have variety in resolution and they don’t cover the whole object. As a result, some parts of the objects have a destroyed geometry.

Figure 1. Obtained point cloud from Photogrammetry.

The work in CAD in order to enhance the results was done into two different ways:

  1. the improvement of the results from photogrammetry:
    Considering the symmetrical characteristic of the object. The destroyed side was removed. Then the other side was mirrored against the front side in order to replace the destroyed one. Moreover, the reconstruction of the reliefs was implemented as well using a 2d drawing.
Figure 2. After the Mirroring. (a) Shows the gab because of the deleting of the side. (b) Shows the results after the correction.
Figure 3. The different steps of constructing the relief of the temple.
  1. Using the archaeologists drawings by digitizing and extrude them.
Figure 4. The results of CAD approach from the archaeologists maps.

Texturing of the object is also essential. To apply a photo for texturing the image should be rectified and removing the unnecessary scenes. Then project the image on the point cloud.

Figure 5. Texturing results.

Conclusions

Awareness should be raised in conserving heritage, due to their importance and impact. The paper provided solutions to conserve any destructed site and different methodology to overcome the lack of the data. The methods used in this paper could be applied to any similar case. This will make preserving heritages more approachable even in severe states of destruction. The whole work could be integrated with other efforts and build the Virtual Museum and provide better understanding for the studying area.

Ansprechpartner

Dieses Bild zeigt Norbert Haala
apl. Prof. Dr.-Ing.

Norbert Haala

Stellvertretender Institutsleiter

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