Lossless Coding of Light Fields based on 4D Minimum Rate Predictors

Common representations of light fields use four-dimensional data structures, where a given pixel is closely related not only to its spatial neighbours within the same view, but also to its angular neighbours, co-located in adjacent views. Such structure presents increased redundancy between pixels,...

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Veröffentlicht in:IEEE transactions on image processing Jg. 31; S. 1
Hauptverfasser: Santos, Joao M., Thomaz, Lucas A., Assuncao, Pedro A. A., Da Silva Cruz, Luis A., Tavora, Luis, Faria, Sergio M. M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States IEEE 01.01.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
4D partition
4D prediction
Algorithms
Biomedical imaging
Cameras
Coding
Data structures
Encoding
Image coding
Light field compression
Lossless coding
Materials requirements planning
Medical Imaging
Pixels
Redundancy
Representations
Transform coding
ISSN:1057-7149, 1941-0042, 1941-0042
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Zusammenfassung:Common representations of light fields use four-dimensional data structures, where a given pixel is closely related not only to its spatial neighbours within the same view, but also to its angular neighbours, co-located in adjacent views. Such structure presents increased redundancy between pixels, when compared with regular single-view images. Then, these redundancies are exploited to obtain compressed representations of the light field, using prediction algorithms specifically tailored to estimate pixel values based on both spatial and angular references. This paper proposes new encoding schemes which take advantage of the four-dimensional light field data structures to improve the coding performance of Minimum Rate Predictors. The proposed methods expand previous research on lossless coding beyond the current state-of-the-art. The experimental results, obtained using both traditional datasets and others more challenging, show bit-rate savings no smaller than 10%, when compared with existing methods for lossless light field compression.
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ISSN:1057-7149
1941-0042
1941-0042
DOI:10.1109/TIP.2022.3146009