| 1. |
- Svanberg, Sune, et al.
(författare)
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Applications of terawatt lasers
- 1994
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Ingår i: LASER SPECTROSCOPY - XITH INTERNATIONAL CONFERENCE. - : AIP. - 1551-7616 .- 0094-243X. - 1563962624 ; :290, s. 264-269
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Konferensbidrag (refereegranskat)
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| 2. |
- Ynnerman, Anders, 1963-, et al.
(författare)
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Multi-Touch Table System for Medical Visualization
- 2015
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Ingår i: Eurographics 2015. - : Eurographics - European Association for Computer Graphics.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Medical imaging plays a central role in a vast range of healthcare practices. While the usefulness of 3D visualizations is well known, the adoption of such technology has previously been limited in many medical areas. This paper, awarded the Dirk Bartz Prize for Visual Computing in Medicine 2015, describes the development of a medical multi-touch visualization table that successfully has reached its aim to bring 3D visualization to a wider clinical audience. The descriptions summarize the targeted clinical scenarios, the key characteristics of the system, and the user feedback obtained.
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| 3. |
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| 4. |
- Lundell, Björn, et al.
(författare)
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Enabling OSS usage through procurement projects : How can lock-in effects be avoided?
- 2021
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Ingår i: Open Source Systems. - Cham : Springer. - 9783030752507 - 9783030752538 - 9783030752514 ; , s. 16-27
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Konferensbidrag (refereegranskat)abstract
- Formulation of mandatory requirements in procurement projects has significant influence on opportunities for development and deployment of Open Source Software (OSS). The paper contributes insights on a widespread practice amongst public procurement projects which causes problematic lock-in effects and thereby inhibits opportunities for use of OSS solutions. Through a systematic investigation of 30 randomly selected procurement projects in the software domain the paper highlights illustrative examples of mandatory requirements which cause lock-in and presents five recommendations for how requirements instead should be formulated in order to avoid causing lock-in. Findings show significant lock-in caused by current procurement practices with a stark preference for proprietary software and SaaS solutions amongst procuring organisations.
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| 5. |
- Ornhag, Marcus Valtonen, et al.
(författare)
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Efficient real-time radial distortion correction for UAVs
- 2021
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Ingår i: 2021 IEEE Winter Conference on Applications of Computer Vision (WACV). - : IEEE. - 9780738142661 - 9781665404778 - 9781665446402 ; , s. 1750-1759
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Konferensbidrag (refereegranskat)abstract
- In this paper we present a novel algorithm for onboard radial distortion correction for unmanned aerial vehicles (UAVs) equipped with an inertial measurement unit (IMU), that runs in real-time. This approach makes calibration procedures redundant, thus allowing for exchange of optics extemporaneously. By utilizing the IMU data, the cameras can be aligned with the gravity direction. This allows us to work with fewer degrees of freedom, and opens up for further intrinsic calibration. We propose a fast and robust minimal solver for simultaneously estimating the focal length, radial distortion profile and motion parameters from homographies. The proposed solver is tested on both synthetic and real data, and perform better or on par with state-of-the-art methods relying on pre-calibration procedures. Code available at: https://github.com/marcusvaltonen/HomLib.1
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| 6. |
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| 7. |
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| 8. |
- Örnhag, Marcus Valtonen, et al.
(författare)
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Minimal Solvers for Indoor UAV Positioning
- 2021
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Ingår i: 2020 25TH INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION (ICPR). - : IEEE COMPUTER SOC. - 1051-4651. - 9781728188089 ; , s. 1136-1143
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Konferensbidrag (refereegranskat)abstract
- In this paper we consider a collection of relative pose problems which arise naturally in applications for visual indoor navigation using unmanned aerial vehicles (UAVs). We focus on cases where additional information from an onboard IMU is available and thus provides a partial extrinsic calibration through the gravitational vector. The solvers are designed for a partially calibrated camera, for a variety of realistic indoor scenarios, which makes it possible to navigate using images of the ground floor. Current state-of-the-art solvers use more general assumptions, such as using arbitrary planar structures; however, these solvers do not yield adequate reconstructions for real scenes, nor do they perform fast enough to be incorporated in real-time systems. We show that the proposed solvers enjoy better numerical stability, are faster, and require fewer point correspondences, compared to state-of-the-art approaches. These properties are vital components for robust navigation in real-time systems, and we demonstrate on both synthetic and real data that our method outperforms other solvers, and yields superior motion estimation(1).
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| 9. |
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| 10. |
- Axelsson, Emil, 1978, et al.
(författare)
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Feldspar: A Domain Specific Language for Digital Signal Processing algorithms
- 2010
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Ingår i: Eighth ACM/IEEE International Conference on Formal Methods and Models for Codesign. - 9781424478859 ; , s. 169-178
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Konferensbidrag (refereegranskat)abstract
- A new language, Feldspar, is presented, enabling high-level and platform-independent description of digital signal processing (DSP) algorithms. Feldspar is a pure functional language embedded in Haskell. It offers a high-level dataflow style of programming, as well as a more mathematical style based on vector indices. The key to generating efficient code from such descriptions is a high-level optimization technique called vector fusion. Feldspar is based on a low-level, functional core language which has a relatively small semantic gap to machine-oriented languages like C. The core language serves as the interface to the back-end code generator, which produces C. For very small examples, the generated code performs comparably to hand-written C code when run on a DSP target. While initial results are promising, to achieve good performance on larger examples, issues related to memory access patterns and array copying will have to be addressed.
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