International Organization for Standardization Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Associated Audio
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چکیده
Polygon/spline approximation of arbitrary image region shapes is submitted for tool evaluation. First, polygon approximation is performed. Starting with an initial 4–vertices polygon which represents the farest elongations into different directions, the polygon approximation is iteratively refined taking into account the local requirements until a given tolerance criterion is satisfied everywhere. Then, spline approximation is calculated using the polygon vertices. Whenever spline approximation also satisfies the tolerance criterion for a certain part of the shape, spline approximation substitutes polygon approximation for that part thus giving the approximated shape a more natural look. By this combined approach, the advantages of both techniques are utilized and their disadvantages avoided. Thus, the combined approach is efficient in terms of reduction of the number of shape points for which coordinates must be transmitted and with this also in terms of bit rate reduction. It has no interdependency during the iterative refinement of the approximation in different parts of the shape, and it has a natural look. Predictive coding is proposed for further bit rate reduction.
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International Organisation for Standardisation Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Audio
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International Organisation for Standardisation Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Audio
متن کامل
International Organisation for Standardisation Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Audio Information
متن کامل
International Organisation for Standardisation Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Associated Audio
This document was written based on “very first draft” of MPEG-7 PPD (document N1923), and on some of the discussions in Fribourg and in the AHG. However, it is a personal contribution. For time reasons, we did not include the modifications to N1923 presented by Ibrahim Sezan, which synchronize it to other input documents. Modifications vs. N1923 are indicated through the Word versioning mechani...
متن کاملInternational Organisation for Standardisation Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Audio
• Select stereo pair from data set, i.e. an original left view OL and an original right view OR (OL=8, OR=9) • Estimate depth corresponding to neighboring original views NL (left) and NR (right) (NL=7, NR=10), using any available camera • Synthesize views (synthesized left SL and synthesized right SR) at positions of OL and OR from NL+D and NR+D • Bring synthesized video to the meeting • Compar...
متن کاملInternational Organisation for Standardisation Organisation Internationale De Normalisation Iso/iec Jtc1/sc29/wg11 Coding of Moving Pictures and Audio Information
The Moving Picture’s Experts Group (MPEG) has recently started work on a new standardization effort called the "Multimedia Content Description Interface," also known as MPEG-7. The goal of MPEG-7 is to enable fast and efficient searching and filtering of audio-visual material. The effort is being driven by specific requirements gleaned from a large number of applications related to image, video...
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تاریخ انتشار 1995