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- W706730 abstract "Fraunhofer Institute for Telecommunications Einsteinufer 37, 10587 Berlin, Germany Tel.: +49 30 31002 – {611,614,615} Fax: +49 30 392 72 00 {frederik.zilly, peter.eisert, peter.kauff}@hhi.fraunhofer.de Abstract The Stereoscopic Analyzer (STAN) is an assistance system for the production of stereoscopic 3D. Developed by the Fraunhofer Heinrich Hertz Institute, Berlin, in cooperation with KUK Film Production, Munich, STAN combines real-time image analysis with intelligent automated tools and intuitive graphical user interfaces to assist camera operators and production staff in shooting the right stereo content for 3D postproduction and 3D live events. Keywords: Stereo Production, 3DTV, 3D Cinema 1 Introduction This paper discusses an integrated hardware-software solution of an assistance system for stereo shooting called Stereoscopic Analyser (STAN). A feature-based scene analysis estimates the relative pose of the two cameras in order to allow an optimal camera alignment, avoiding vertical disparities and to eliminate remaining vertical disparities through an image rectification process. In addition it detects the near- and far clipping plane of the scene, derives the optimal inter-axial distance (stereo baseline) from it and gives a framing alert if out-screen objects are clipped due to a wrongly selected convergence plane. 2 Detecting Robust Point Correspondences The camera signals are captured using a grabber board with two single-link HD-SDI interfaces. In a first step, the luminance signal is down-sampled and the SIFT feature detector is used to find interest points and match point correspondences. The constraints of the epipolar geometry are used to filter out robust matches, to estimate the pose of the two cameras, to correct camera alignments as best as possible and to eliminate remaining vertical disparities by rectification. 3 Near- and far clipping plane detection A histogram is calculated from the horizontal disparities of the matched point correspondences. Feature point locations might be affected by a small error, so we define the near- and far clipping plane as the 2" @default.
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- W706730 date "2009-01-01" @default.
- W706730 modified "2023-09-23" @default.
- W706730 title "REAL-TIME ANALYSIS AND CORRECTION OF STEREOSCOPIC HDTV SEQUENCES" @default.
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