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49 results on '"Waechter, Michael"'

2. Die FKM-Richtlinie

Author

Wächter, Michael, Müller, Christian, Esderts, Alfons, Wächter, Michael, Müller, Christian, and Esderts, Alfons

Published
2021
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8. Beispiel: Lagerbock

Author

Wächter, Michael, Müller, Christian, Esderts, Alfons, Wächter, Michael, Müller, Christian, and Esderts, Alfons

Published
2021
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9. Einleitung

Author

Wächter, Michael, Müller, Christian, Esderts, Alfons, Wächter, Michael, Müller, Christian, and Esderts, Alfons

Published
2021
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19. Towards a Mobile Assistance System to Raise Productivity in Maintenance

Author

Waechter, Michael, Loeffler, Thomas, Bullinger, Angelika C., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, and Nunes, Isabel L., editor

Published
2020
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20. An Analysis of Sketched IRLS for Accelerated Sparse Residual Regression

Author

Iwata, Daichi, Waechter, Michael, Lin, Wen-Yan, Matsushita, Yasuyuki, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Vedaldi, Andrea, editor, Bischof, Horst, editor, Brox, Thomas, editor, and Frahm, Jan-Michael, editor

Published
2020
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21. Deep Near-Light Photometric Stereo for Spatially Varying Reflectances

Author

Santo, Hiroaki, Waechter, Michael, Matsushita, Yasuyuki, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Vedaldi, Andrea, editor, Bischof, Horst, editor, Brox, Thomas, editor, and Frahm, Jan-Michael, editor

Published
2020
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22. What Is Learned in Deep Uncalibrated Photometric Stereo?

Author

Chen, Guanying, Waechter, Michael, Shi, Boxin, Wong, Kwan-Yee K., Matsushita, Yasuyuki, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Vedaldi, Andrea, editor, Bischof, Horst, editor, Brox, Thomas, editor, and Frahm, Jan-Michael, editor

Published
2020
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23. Virtual Rephotography: Novel View Prediction Error for 3D Reconstruction

Author

Waechter, Michael, Beljan, Mate, Fuhrmann, Simon, Moehrle, Nils, Kopf, Johannes, and Goesele, Michael

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Graphics, I.3.7
Abstract

The ultimate goal of many image-based modeling systems is to render photo-realistic novel views of a scene without visible artifacts. Existing evaluation metrics and benchmarks focus mainly on the geometric accuracy of the reconstructed model, which is, however, a poor predictor of visual accuracy. Furthermore, using only geometric accuracy by itself does not allow evaluating systems that either lack a geometric scene representation or utilize coarse proxy geometry. Examples include light field or image-based rendering systems. We propose a unified evaluation approach based on novel view prediction error that is able to analyze the visual quality of any method that can render novel views from input images. One of the key advantages of this approach is that it does not require ground truth geometry. This dramatically simplifies the creation of test datasets and benchmarks. It also allows us to evaluate the quality of an unknown scene during the acquisition and reconstruction process, which is useful for acquisition planning. We evaluate our approach on a range of methods including standard geometry-plus-texture pipelines as well as image-based rendering techniques, compare it to existing geometry-based benchmarks, and demonstrate its utility for a range of use cases., Comment: 10 pages, 12 figures, paper was submitted to ACM Transactions on Graphics for review

Published
2016

24. Towards an Engineering Process to Design Usable Tangible Human-Machine Interfaces

Author

Wächter, Michael, Hoffmann, Holger, Bullinger, Angelika C., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Bagnara, Sebastiano, editor, Tartaglia, Riccardo, editor, Albolino, Sara, editor, Alexander, Thomas, editor, and Fujita, Yushi, editor

Published
2019
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25. Beispiel 2: Lagerbock

Author

Wächter, Michael, Müller, Christian, Esderts, Alfons, Wächter, Michael, Müller, Christian, and Esderts, Alfons

Published
2017
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29. Die FKM-Richtlinie

Author

Wächter, Michael, Müller, Christian, Esderts, Alfons, Wächter, Michael, Müller, Christian, and Esderts, Alfons

Published
2017
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32. Light Structure from Pin Motion: Simple and Accurate Point Light Calibration for Physics-Based Modeling

Author

Santo, Hiroaki, Waechter, Michael, Samejima, Masaki, Sugano, Yusuke, Matsushita, Yasuyuki, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Ferrari, Vittorio, editor, Hebert, Martial, editor, Sminchisescu, Cristian, editor, and Weiss, Yair, editor

Published
2018
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33. Einleitung

Author

Wächter, Michael, Müller, Christian, Esderts, Alfons, Wächter, Michael, Müller, Christian, and Esderts, Alfons

Published
2017
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42. Discrete Search Photometric Stereo for Fast and Accurate Shape Estimation

Author

Enomoto, Kenji, Waechter, Michael, Okura, Fumio, Kutulakos, Kiriakos N., and Matsushita, Yasuyuki

Abstract

We consider the problem of estimating surface normals of a scene with spatially varying, general bidirectional reflectance distribution functions (BRDFs) observed by a static camera under varying distant illuminations. Unlike previous approaches that rely on continuous optimization of surface normals, we cast the problem as a discrete search problem over a set of finely discretized surface normals. In this setting, we show that the expensive processes can be precomputed in a scene-independent manner, resulting in accelerated inference. We discuss two variants of our discrete search photometric stereo (DSPS), one working with continuous linear combinations of BRDF bases and the other working with discrete BRDFs sampled from a BRDF space. Experiments show that DSPS has comparable accuracy to state-of-the-art exemplar-based photometric stereo methods while achieving 10–100x acceleration.

Published
2023
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46. Novel View Prediction Error as a Quality Metric for Image-Based Modeling and Rendering

Author

Waechter, Michael

Subjects
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Abstract

Image-based modeling and rendering (IBMR) is a sub-discipline of visual computing whose objective it is to capture images of a scene in the real world, construct a model of the world using the captured image data, and use this model to synthesize images of the world from previously unobserved viewpoints. This so-called novel (or virtual) view prediction has traditionally been tackled from two sides: On one side the computer vision community has pursued the construction of geometric models from sets of images only. On the other side the computer graphics community has worked on producing photo-realistic renderings from hand-modeled, virtual scenes and has further come up with algorithms that allow for the synthesis of novel views from input photos of real-world scenes either directly without any geometric models or with approximate, hand-modeled geometry models. The wealth of different IBMR systems also brought in its wake various quality evaluation systems that are more or less tailored to the properties of specific IBMR systems. In recent years, computer vision and graphics have grown together, slowly approaching the goal of novel view prediction on scenes without restrictions. However, the fragmentation of evaluation systems has still not been overcome. This thesis makes two main complementary contributions: We first present a novel texture mapping algorithm that assigns a static texture to polygonal 3D models, given images that are registered in the same coordinate frame as the model. Our texturing algorithm takes into consideration real-world scenes' properties such as illumination and exposure changes between images, non-rigid scene parts, unreconstructed occluders such as pedestrians, and images with pixel footprints that vary by orders of magnitude. We address the size (\ie, the number of images and the number of polygons in the geometry model) of real-world datasets with a novel Markov random field solver that solves the main bottleneck of our texturing framework orders of magnitude faster than related work. Conceptually, we can think of our texturing framework as closing the gap between image-based 3D reconstruction and photo-realistic rendering, thereby turning 3D reconstructions into full-fledged IBMR representations. Second, we introduce an evaluation scheme for IBMR methods that is guided by the definition of IBMR: Novel view prediction error evaluates how well an IBMR algorithm predicts novel views by dividing all input images into training and test images, keeping the test images secret, giving the training images to the IBMR algorithm, letting it predict the test images, and comparing its predictions with the actual test images. In this thesis we verify that (if used in conjunction with suitable image comparison metrics) this scheme fulfills a range of basic, intuitive conditions. We further compare our scheme with traditional, geometric 3D reconstruction evaluation schemes, show in a user study how our scheme relates to human judgment of the quality of novel view predictions, and present a new, general IBMR benchmark based on our evaluation scheme.

Published
2017

47. Get a grip: multi-method evaluation of handles for tablets on the shop floor.

Author

Waechter, Michael, Rueffert, Danny, and Bullinger, Angelika C.

Subjects
SKELETAL muscle physiology, ELECTROMYOGRAPHY, FOCUS groups, GRIP strength, HUMAN comfort, ERGONOMICS, POCKET computers, QUALITY assurance, QUESTIONNAIRES, SHOPPING, USER interfaces, FIELD research, TASK performance
Abstract

Tablets on the shop floor need handles because user requirements for handling differ from tablet usage in leisure time. The ergonomics of such handles is under-researched, resulting in a lack of methods for their design and evaluation. In this paper, we present a multi-method evaluation of handles for a shop floor tablet. We combine and compare results of focus groups and the Comfort Questionnaire for Hand tools (CQH) with electromyography (EMG). With a field and a laboratory study, we evaluate four handles in order to identify (i) the most ergonomically rated handle and (ii) the most efficient evaluation method. Results consist of an evaluated prototype, and data that shows the comparability of results from focus groups and questionnaires to results from EMG measurements. Classifying handles as tangible human machine interfaces, we suggest that subjective evaluation with focus groups and CQH is efficient to evaluate their ergonomic quality. Practitioner summary: A handle for a tablet used in production environment is evaluated with different methods. Results show that data from focus groups and questionnaires can be used for evaluation of usability in the future, rendering complex EMG measurements unnecessary and making usability evaluation more efficient. Abbreviation: CQH: comfort questionnaire for hand tools; EMG: electromyography; tHMI: tangible human-machine interfaces; TUI: tangible user interfaces; GUI: user interface; RMS: root mean square; MVC: maximum voluntary contraction; BB: musculus biceps brachii; FCU: musculus flexor carpi ulnaris; FCR: musculus flexor carpi radialis; BR: musculus brachioradialis; FPB: musculus flexor pollicis brevis [ABSTRACT FROM AUTHOR]

Published
2020
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48. Virtual rephotography

Author

Waechter, Michael, primary, Beljan, Mate, additional, Fuhrmann, Simon, additional, Moehrle, Nils, additional, Kopf, Johannes, additional, and Goesele, Michael, additional

Published
2017
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