Ulrich Krispel

Ulrich Krispel
Fraunhofer Austria Research GmbH | FRAUNHOFER · Visual Computing, Graz

Dr. techn.

About

37
Publications
33,893
Reads
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300
Citations
Introduction
Ulrich Krispel currently works at the Visual Computing, Graz, Fraunhofer Austria Research GmbH. Ulrich does research in Computer Graphics, Algorithms and Programming Languages. His current project is 'Generative Modeling.'
Additional affiliations
March 2014 - present
Fraunhofer Austria Research GmbH
Position
  • Research Assistant
September 2012 - February 2014
Technische Universität Darmstadt
Position
  • Research Assistant
September 2012 - April 2014
Technische Universität Darmstadt
Position
  • University Assistant
Description
  • teaching undergrad courses of computer science basics and computer graphics

Publications

Publications (37)
Conference Paper
The cycle of computer aided design and verification via physics simulation is often burdened by the use of separate tools for modeling and simulation, which requires conversion between formats, e.g. meshing for finite element simulation. This separation is often unavoidable because the tools contain specific domain knowledge which is mandatory for...
Chapter
The need to analyze and visualize distances between objects arises in many use cases. Although the problem to calculate the distance between two polygonal objects may sound simple, real-world scenarios with large models will always be challenging, but optimization techniques – such as space partitioning – can reduce the complexity of the average ca...
Conference Paper
Full-text available
Animations aid greatly to a presentation of a sophisticated man-made object. With additional interactivity, a user can explore such an object to gain even better understanding. The authoring of such dynamic models is often very resource demanding, as the animations and logic of interaction has to be expressed in an authoring program; often using a...
Article
Full-text available
Background The concept of building information management (BIM) is based on its holistic nature. This idea pays off, if all relevant information is fused into one consistent data set. As a consequence, the completeness of data is vital and the research question on how to complete data automatically remains open. Methods In this article we present a...
Article
Terrestrial laser scanners equipped with in-built cameras are well suited for identifying surfaces in point clouds of building interiors. The colours from the images can be automatically projected on the planar structures, resulting in a textured 3D model of rooms, halls, corridors, stairwells and other indoor spaces. Besides this, using computer v...
Article
Full-text available
(URL: http://ns2.thinkmind.org/index.php?view=article&articleid=intsys_v9_n34_2016_15). Value stream mapping is a lean management method for analyzing and optimizing a series of events for production or services. Even today the first step in value stream analysis – the acquisition of the current state map – is still created using pen & paper by phys...
Chapter
In the context of computer-aided design, computer graphics and geometry processing, the idea of generative modeling is to allow the generation of highly complex objects based on a set of formal construction rules. Using these construction rules, a shape is described by a sequence of processing steps, rather than just by the result of all applied op...
Conference Paper
Full-text available
Building information modeling (BIM) with high level of detail and semantic information on buildings throughout their lifetime are getting more and more important for stakeholders in the building domain. Currently, such models are not yet present for the majority of today’s building stock. With increasing speed and precision of laser scans or photog...
Conference Paper
New computational methods provide means to deduce semantic information from measurements, such as range scans and photographs of building interiors. In this paper, we showcase a method that allows to estimate elements that are not directly observable – ducts and power lines in walls. For this, we combine information, which is deducted by algorithms...
Conference Paper
Full-text available
Value stream mapping is a lean management method for analyzing and optimizing a series of events for production or services. Even today the first step in value stream analysis - the acquisition of the current state - is still created using pen & paper by physically visiting the production place. We capture a digital representation of how manufactur...
Chapter
The creation of building models has high importance, due to the demand for detailed buildings in virtual worlds, games, movies and geo information systems. Due to the high complexity of such models, especially in the urban context, their creation is often very demanding in resources. Procedural methods have been introduced to lessen these costs, an...
Article
Full-text available
In the context of computer-aided design, computer graphics and geometry processing, the idea of generative modeling is to allow the generation of highly complex objects based on a set of formal construction rules. Using these construction rules, a shape is described by a sequence of processing steps, rather than just by the result of all applied op...
Conference Paper
Full-text available
This tutorial introduces the concepts and techniques of procedural & generative modeling. It starts with some introductory examples to motivate the main idea: to describe a shape using an algorithm. After the explanation of technical terms, the second Section focuses on technical details of algorithm descriptions, programming languages, grammars an...
Conference Paper
Full-text available
Recent trends in 3D scanning are aimed at the fusion of range data and color information from images. The combination of these two outputs allows to extract novel semantic information. The workflow presented in this paper allows to detect objects, such as light switches, that are hard to identify from range data only. In order to detect these eleme...
Conference Paper
Full-text available
The idea of generative modeling is to allow the generation of highly complex objects based on a set of formal construction rules. Using these construction rules, a shape is described by a sequence of processing steps, rather than just by the result of all applied operations: Shape design becomes rule design. Due to its very general nature, this app...
Article
The building industry and facility management is in a state of upheaval: The complexity of the real world is now represented in its digital counterpart. The established object-based file format “Industrial Foundation Classes (IFC)” developed by the International Alliance for Interoperability facilitates interoperability in the context of Building I...
Conference Paper
While the growing demand for new building models contained in virtual worlds, games, and movies, makes the easy and fast creation of modifiable models more and more important, 3D modeling of buildings can be a tedious task due to their sometimes complex geometry. For historic buildings, especially the roofs can be challenging. We present a new meth...
Article
Full-text available
With the current state of video games growing in scale, manual content creation may no longer be feasible in the future. Split grammars are a promising technology for large-scale procedural generation of urban structures, which are very common in video games. Buildings with curved parts, however, can currently only be approximated by static pre-mod...
Conference Paper
Full-text available
This tutorial introduces the concepts and techniques of generative modeling. It starts with some introductory examples in the first learning unit to motivate the main idea: to describe a shape using an algorithm. After the explanation of technical terms, the second unit focuses on technical details of algorithm descriptions, programming languages,...
Conference Paper
With the current state of video games growing in scale, manual content creation may no longer be feasible in the future. Split grammars are a promising technology for large scale procedural generation of urban structures, which are very common in video games. Buildings with curved parts, however, can currently only be approximated by static pre-mod...
Conference Paper
Shape grammars are the method of choice for procedural modeling of architecture. State of the art shape grammar systems define a bounding box for each shape; various operations can then be applied based on this bounding box. Most notably, the box can be split into smaller boxes along any of its three axes. We argue that a greater variety can be obt...
Article
Full-text available
The generative surface reconstruction problem can be stated like this: Given a finite collection of 3D shapes, create a small set of functions that can be combined to generate the given shapes procedurally. We propose generative fact labeling (GFL) as an attempt to organize the iterative process of shape analysis and shape synthesis in a systematic...
Article
Full-text available
High quality urban reconstruction requires more than multi-view reconstruction and local optimization. The structure of facades depends on the general layout, which has to be optimized as a global task. Shape grammars are an established method to express hierarchical spatial rela-tionships, and are therefore suited as constraint of repre-sentation...
Article
The creation of building and facility models is a tedious and complicated task. Existing CAD models are typically not well suited since they contain too much or not enough detail; the manual modeling approach does not scale; different views on the same model are needed, and different levels of detail and abstraction; and finally, conventional model...
Conference Paper
Full-text available
In the course of a project related to green building design, we have created a group of eight parametric building models that can be manipulated interactively with respect to dimensions, number of floors, and a few other parameters. We report on the commonalities and differences between the models and the abstractions that we were able to identify.
Conference Paper
Shape grammar systems are the suitable method for modeling hierarchically structured 3D objects. A great variety of similar objects can be modeled using only a small set of rules. We present a prototypical graphical user interface for hierarchical volumetric modeling using the split grammar approach. Our focus is on creating split rules interactive...
Conference Paper
Scripting techniques are used in various contexts. The field of application ranges from layout description languages (PostScript), user interface description languages (XUL) and classical scripting languages (JavaScript) to action nodes in scene graphs (VRMLScript) and web-based desktop applications (AJAX). All these applications have an increase o...
Article
Full-text available
http://www.cgv.tugraz.at/cityfit ABSTRACT: Many approaches for automatic 3D city reconstruction exist, but they are still missing an important feature: detailed facades. The goal of the CityFit project is to reconstruct the facades of 80% of the buildings in the city of Graz fully automatically. The challenge is to establish a complete workflow, ra...

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Projects

Projects (3)
Project
Create a new Value Stream Framework that includes Past, Current and Future States, Simulation and Waste Management. Automate the UI in certain repetitive tasks, like in the case of automatic selection of next best shape to be connected.