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This paper presents a novel method for detecting scale invariant keypoints. It fills a gap in the set of available methods, as it proposes a scale-selection mechanism for junction-type features. The method is a scale-space extension of the detector proposed by Förstner (1994) and uses the general spiral feature model of Bigün (1990) to unify(More)
We develop a qualitative measure for the completeness and complementarity of sets of local features in terms of covering relevant image information. The idea is to interpret feature detection and description as image coding, and relate it to classical coding schemes like JPEG. Given an image, we derive a feature density from a set of local features , and(More)
We present a scheme for measuring completeness of local feature extraction in terms of image coding. Completeness is here considered as good coverage of relevant image information by the features. As each feature requires a certain number of bits which are representative for a certain subregion of the image, we interpret the coverage as a sparse coding(More)
We present a novel surface model and reconstruction method for man-made environments that take prior knowledge about topology and geometry into account. The model favors but is not limited to horizontal and vertical planes that are pairwise orthogonal. The reconstruction method does not require one particular class of sensors, as long as a triangulated(More)
Scope We discuss the utility of dimensionality reduction algorithms to put data points in high dimensional spaces into correspondence by learning an affine transformation between assigned data points on a lower dimensional structure. We demonstrate this procedure for the assignment of cartoon faces with and without glasses and the classification of(More)
  • F. Schindler
  • 1989
Apple Computer has successfully replaced traditional written assembly procedures with living text-video animations of the highest clarity in its Macintosh factory. Able to cross language barriers, these tutors guide both novice and veteran employees in the right way to do things. These videos are available at all times on the assembly station's computer,(More)
Die Untersuchung soll sowohl an synthetisch generierten Daten, an online verfügbaren Benchmarks 4 als auch an selbst erzeugten Testdatensätzen durchgeführt werden. Comparison of Bundler and Aurelo for automatic camera orientation Automatic camera orientation serves the computation of interior and exterior orientation parameters of one or several cameras(More)
relative Ori-entierung, auf seine Leistungsfähigkeit hin untersucht werden. Erklärung Hiermit erkläre ich, dass ich die vorliegende Arbeit selbstständig und ohne Benutzung anderer als der angegebenen Hilfsmittel angefertigt habe. Alle Stellen, die wörtlich oder sinngemäß aus veröffentlichten oder nicht veröffentlichten Schriften entnommen wurden, sind als(More)