Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform
Object-based image coding is drawing a great attention for the many opportunities it offers to high-level applications. In terms of rate-distortion performance, however, its value is still uncertain, because the gains provided by an accurate image segmentation are balanced by the inefficiency of cod...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2007-03-01
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| Series: | EURASIP Journal on Image and Video Processing |
| Online Access: | http://dx.doi.org/10.1155/2007/78323 |
| _version_ | 1828735402780917760 |
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| author | Marco Cagnazzo Sara Parrilli Giovanni Poggi Luisa Verdoliva |
| author_facet | Marco Cagnazzo Sara Parrilli Giovanni Poggi Luisa Verdoliva |
| author_sort | Marco Cagnazzo |
| collection | DOAJ |
| description | Object-based image coding is drawing a great attention for the many opportunities it offers to high-level applications. In terms of rate-distortion performance, however, its value is still uncertain, because the gains provided by an accurate image segmentation are balanced by the inefficiency of coding objects of arbitrary shape, with losses that depend on both the coding scheme and the object geometry. This work aims at measuring rate-distortion costs and gains for a wavelet-based shape-adaptive encoder similar to the shape-adaptive texture coder adopted in MPEG-4. The analysis of the rate-distortion curves obtained in several experiments provides insight about what performance gains and losses can be expected in various operative conditions and shows the potential of such an approach for image coding. |
| first_indexed | 2024-04-12T23:06:15Z |
| format | Article |
| id | doaj.art-da27ec94ae5c4d14821ea4b7d8adb0ad |
| institution | Directory Open Access Journal |
| issn | 1687-5176 1687-5281 |
| language | English |
| last_indexed | 2024-04-12T23:06:15Z |
| publishDate | 2007-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Image and Video Processing |
| spelling | doaj.art-da27ec94ae5c4d14821ea4b7d8adb0ad2022-12-22T03:12:55ZengSpringerOpenEURASIP Journal on Image and Video Processing1687-51761687-52812007-03-01200710.1155/2007/78323Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet TransformMarco CagnazzoSara ParrilliGiovanni PoggiLuisa VerdolivaObject-based image coding is drawing a great attention for the many opportunities it offers to high-level applications. In terms of rate-distortion performance, however, its value is still uncertain, because the gains provided by an accurate image segmentation are balanced by the inefficiency of coding objects of arbitrary shape, with losses that depend on both the coding scheme and the object geometry. This work aims at measuring rate-distortion costs and gains for a wavelet-based shape-adaptive encoder similar to the shape-adaptive texture coder adopted in MPEG-4. The analysis of the rate-distortion curves obtained in several experiments provides insight about what performance gains and losses can be expected in various operative conditions and shows the potential of such an approach for image coding.http://dx.doi.org/10.1155/2007/78323 |
| spellingShingle | Marco Cagnazzo Sara Parrilli Giovanni Poggi Luisa Verdoliva Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform EURASIP Journal on Image and Video Processing |
| title | Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform |
| title_full | Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform |
| title_fullStr | Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform |
| title_full_unstemmed | Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform |
| title_short | Costs and Advantages of Object-Based Image Coding with Shape-Adaptive Wavelet Transform |
| title_sort | costs and advantages of object based image coding with shape adaptive wavelet transform |
| url | http://dx.doi.org/10.1155/2007/78323 |
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