Recording Indoor Scenes using a Rotating Camera with Linear CCD-Array 
P. Duracher, M. Maresch 
3D Object Reconstruction Group 
Institute for Computer Graphics 
Graz Technical University 
Austria 
email: {duracher, maresch}@icg.tu-graz.ac.at 
Commision I, Working Group 1/3 
KEY WORDS: indoor room recording, line CCD’s, rotational camera motion, photo-realistic texture, 3D object 
reconstruction 
ABSTRACT 
This paper presents a method for intelligent recording the texture of an enclosed space such as a room in a 
building, a hallway or a courtyard in a city block using a rotating CCD line. The main objective is the design of a 
sensor platform to record the photorealistic texture automatically. Such a sensor platform with their main 
components will be shown. The introduced imaging system forms the basis for new methods and techniques to 
create three-dimensional and textured databasis of enclosed spaces in a semi-automatic manner. Design and 
implementation are described in detail, and the first results will be shown. 
KURZFASSUNG 
Diese Veröffentlichung stellt eine neue Methode zur intelligenten Erfassung von Innenräumen, z.B. Raum bzw. 
Gang in einem Gebäude, Innenhof eines Häuserblocks in einer Stadt, usw., dar. Dazu beschreiten wir einen 
neuen Weg bei der Bilddatengewinnung. Diese erfolgt anhand einer rotierenden CCD Zeile. Das 
Hauptaugenmerk liegt dabei im Entwurf und der Realisierung eines Kamerasystems, anhand welchem die 
Fototextur eines Innenraumes auf (semi-)automatischen Weg erfafst werden kann. Das Kamerasystem und 
deren Hauptkomponenten werden hier vorgestellt. Dieses Aufnahmesystem bildet die Basis für neue Methoden 
und Techniken zur fotorealistischen Modellierung realer architektonischer Objekte. Der Entwurf und die 
Implementation dieses Aufnahmesystems werden beschrieben und die ersten Ergebnisse werden gezeigt. 
1 INTRODUCTION application and related to CAD databases. This 
includes a concept for intelligent imaging. A first 
In the last years powerful computer graphics step is the development of a sensor platform to 
hardware and software were developed. This record the photorealistic texture automatically. We 
enables users in a wide range of applications to focus on a platform for recording the texture of an 
gain better insight into processes by visual enclosed space such as a room in a building, a 
simulation. For instance landscape and city hallway or a courtyard in a city block. Design, 
planners as well as tourism agencies are interested implementation and results of this specific 
to simulate photo-realistic views of the environment. electronic imaging system will be described in this 
Architects and city planners for example construct paper. Its application to the modelling of closed 
new buildings with CAD systems and are spaces will be discussed. 
interested to visualize their impact onto the existing 
enviroment beforehand. To reach real realism, it is 
necessary to place the buildings, to be 2 RELATED WORK 
reconstructed, inside a 3D reconstruction of the real 
environment. It is therefore necessary to Much work has been done in the surveying and 
reconstruct the existing environment as a 3D model documentation of historic buildings. Very precise 
of the real scene with as little effort as possible geometric measurements of such man made 
[Durisch, 1992]. structures are performed in close range 
Further more surveying methods based on imaging photogrammetry. The tool to obtain such precise 3D 
sensors are used in many applications in Machine measurement is usually a bundle block adjustment, 
Vision, Robotics, Industrial Metrology and Computer where many photographs of the object are taken 
Vision. Although there is great interest in surveying from different view points and selected image 
and documenting the cultural heritage [Waldháusl, features together with some prior measured 3D 
1992], modern image acquisition methods and object coordinates are evaluated. For this 
analysis techniques are rarely used, mostly for procedure a high degree of manual interaction is 
reasons of cost and complexity. Of interest is the still needed [Streilein et al, 1992], [Wester- 
creation of 3D computer models of existing objects, Ebbinghaus, 1978]. 
both with their geometry and surface properties Creating photorealistic textured models of a city 
[Leberl et al., 1994]. block [Gruber, Meissl, Bóhm, 1995] and of a historic 
Advances are needed to develop automated site [Gruber, Sammer, 1995] was performed 
measurement routines that are specific for the 
54 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996 
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