VCEA 2018 Abstracts


Full Papers
Paper Nr: 1
Title:

Visual Inspection and Error Detection in a Reconfigurable Robot Workcell: An Automotive Light Assembly Example

Authors:

Tatyana Ivanovska, Simon Reich, Robert Bevec, Ziga Gosar, Minija Tamousinaite, Ales Ude and Florentin Wörgötter

Abstract: Small and medium size enterprises (SMEs) often have small batch production. It leads to decreasing product lifetimes and also to more frequent product launches. In order to assist such production, a highly reconfigurable robot workcell is being developed. In this work, a visual inspection system designed for the robot workcell is presented and discussed in the context of the automotive light assembly example. The proposed framework is implemented using ROS and OpenCV libraries. We describe the hardware and software components of the framework and explain the system’s benefits when compared to other commercial packages.

Paper Nr: 2
Title:

Domain Surface for Object Scanning

Authors:

Fu-Che Wu, Chien-Chang Ho and Andrew Dellinger

Abstract: The idea of a domain surface is presented. With this idea, an object scanning algorithm from an RGB-D camera can get a simplified mesh. Object scanning usually consists of surface reconstruction and fusion in two steps. Range data is native to surface construction. However, the constructed surface always requires massive data. It is not convenient to directly apply it to another application. To fuse two surfaces correctly, it is critical to have a precise registration of two views. A domain surface can solve the two main problems simultaneously. For the scanned scene, the system will find some domain surface to approximate the described surface. Thus, the object model is being simplified naturally. Traditionally, a registration problem is always solved as a six degree of freedom transformation. Resolving a robust solution from two dependent factors of the rotation and translation by a non-linear form is not straightforward. Usually, an iterative closest point (ICP) algorithm is adopted to find an optimized solution. However, the solution is based on the initial guess, and it is often trapped into a local minimum. From the normal of the mapped pair domain surface, it can estimate the rotation matrix by a linear SVD method. After the rotation is known, the shift of the feature points can more easily recover the translation. The idea of a domain surface is robust and straightforward for surface reconstruction and registration. With the help of this idea, a simplified mesh constructed from range data becomes easier.

Paper Nr: 3
Title:

GNSSGET and GNSSPLOT Platforms - Matlab GUIs for Retrieving GNSS Products and Visualizing GNSS Solutions

Authors:

Maria Kaselimi, Nikolaos Doulamis, Demitris Delikaraoglou and Eftychios Protopapadakis

Abstract: The emergence of new satellite systems such as Galileo and BeiDou, as well as the modernization of GPS and GLONASS, indicate dramatic changes in the field of satellite positioning. IGS initiated the MGEX (Multi-GNSS Experiment) campaign to overcome the challenges that scientific community has to face due to the arrival of new satellite systems. The variety of products improves and enhances the solution provided by multi-GNSS techniques. However, these heterogeneous products are provided by various Data Centers (DC) and Analysis Centers (AC) in many different locations. Users are therefore required to acquire their data across multiple FTP Servers, a rather cumbersome and time consuming task. The aim of the work described in this paper is to create a platform for the acquisition of GNSS data from heterogeneous sources, for performing high accuracy position solutions and building data visualizations concerning positioning error and solution accuracy. All of these tasks are essential for the purpose of making complex GNSS data more accessible, understandable and useful for precise point positioning, atmospheric research and other applications.

Paper Nr: 4
Title:

Metadata for Intangible Cultural Heritage - The Case of Folk Dances

Authors:

Stamatios Giannoulakis, Nicolas Tsapatsoulis and Nikos Grammalidis

Abstract: It is a fact that states and international organizations are trying to protect and promote intangible cultural heritage. According to UNESCO intangible cultural heritage includes traditions or living expressions inherited from our ancestors and passed on to our descendants. Folk dances are an important part of our intangible cultural heritage, so there is a need to promote and protect them to inherit to the next generations. Beyond digitization of various elements of the dance, proper documentation requires to analyse them (either manually or automatically) and describe all important elements using appropriate metadata. However, although different metadata schemas have been defined in the area of cultural heritage, most are suitable only for tangible heritage, and cannot properly describe elements of intangible cultural heritage. The present study proposes a new metadata schema for describing different elements of folk dance.