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- Title
Fast‐efficient shape error concealment technique based on block classification.
- Authors
Hsia, Shih‐Chang; Hsiao, Cheng Hung
- Abstract
This study presents a fast‐efficient error concealment method for recovering information related to shape. The proposed technique comprises block classification, edge direction interpolation and filtering interpolation. Missing blocks are classified into four categories: transparent, opaque, edge and isolated blocks. Most of the computation is spent on edge blocks and isolated blocks to maximise the cost and performance tradeoff. For the recovery of edge blocks, the edge slope is computed by referring to the nearest available block, from which the missing shape is interpolated parallel to the edge. Isolated blocks are dealt with using a cascade filter to approximate the actual shape. Experimental results show that the proposed method provides better cost performance in the restoration of shapes than that afforded by comparable algorithms, both in numerical parameters and the resulting shapes. The processing speed is approximately two to three times faster than previous methods and low computational load makes the proposed technique applicable to real‐time MPEG‐4 systems.
- Publication
IET Image Processing (Wiley-Blackwell), 2016, Vol 10, Issue 10, p693
- ISSN
1751-9659
- Publication type
Article
- DOI
10.1049/iet-ipr.2016.0043