Compression scheme of sub-images using Karhunen-Loeve transform in three-dimensional integral imaging

Kang, Ho-Hyun; Shin, Dong-Hak; Kim, Eun-Soo

doi:10.1016/j.optcom.2008.03.051

Cited by 25 publications

(10 citation statements)

References 16 publications

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“…The method proposed in [30] exploits the inter-MIs redundancies (using the optical characteristic that MIs have overlapping zones). In [31], a KLT is applied to the viewpoint images.…”

Section: Dct-based Methodsmentioning

confidence: 99%

Full Parallax 3D Video Content Compression

Dricot

Jung

Cagnazzo

et al. 2014

Novel 3D Media Technologies

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Motion parallax is a key cue in the perception of the depth that current 3D stereoscopy and auto-stereoscopy technologies are not able to reproduce. Integral imaging and Super Multi-View video (SMV) are 3D technologies that allow creating a light-field representation of a scene with a smooth full motion parallax (i.e., in horizontal and vertical directions). However the large amount of data required is challenging and implies a need for new efficient coding technologies. This chapter first describes integral imaging and SMV content, acquisition, and display. Then it provides an overview of state-of-the-art methods for full parallax 3D content compression. Finally, several coding schemes are compared and a coding structure that exploits inter-view correlations in both horizontal and vertical directions is proposed. The new structure provides a rate reduction (for the same quality) up to 29.1 % when compared to a basic anchor structure. Neighboring Block Disparity Vector (NBDV) and Inter-View Motion Prediction (IVMP) coding tools are further improved to efficiently exploit coding structures in two dimensions, with rate reduction up to 4.2 % with respect to the reference 3D-HEVC encoder.

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“…The method proposed in [30] exploits the inter-MIs redundancies (using the optical characteristic that MIs have overlapping zones). In [31], a KLT is applied to the viewpoint images.…”

Section: Dct-based Methodsmentioning

confidence: 99%

Full Parallax 3D Video Content Compression

Dricot

Jung

Cagnazzo

et al. 2014

Novel 3D Media Technologies

View full text Add to dashboard Cite

show abstract

“…An alternative KLT-based coding scheme is also proposed in [133], [134], as illustrated in Fig. 18b.…”

Section: ) Klt-based Codingmentioning

confidence: 99%

“…In this case, the lenslet image is decomposed into its subaperture images, which are then KLT coded. It is worth noting that there is no further information on how the resulting KLT coefficients together with the KLT matrix are coded and transmitted in [133], [134]. It is shown that this approach achieves better RD performance compared to JPEG and the same KLT based approach applied to micro-images.…”

Section: ) Klt-based Codingmentioning

confidence: 99%

“…In addition, it is observed that the statistical characteristics between subaperture images are more easily decorrelated than between micro-images, having most of the relevant information compacted into a smaller number of eigenvectors. As stated in [134], due to the small FoV of the microlenses in the array, each captured micro-image comprises only a small portion of the 3D scene, which may have different characteristics in different areas of the 3D scene. On the contrary, all subaperture images comprise the complete 3D scene, which are only slightly different on the angles of projection.…”

Section: ) Klt-based Codingmentioning

confidence: 99%

“…It is shown in the results that the PVS-based approach (using H.264/AVC) outperforms the transform-based approach (using JP3D) with significant gains at lower bit rates, and produces less visible distortion. Also regarding a comparison against transformbased approaches, a hybrid coding solution combining a motion compensated prediction and a KLT transform coding is proposed in [174], and compared against the KLTbased approach proposed in [133], [134]. For the proposed hybrid solution, a PVS of subaperture images is extracted from the lenslet image in spiral scan order, and the central subaperture image is used as the reference frame for encoding all the remaining subaperture images (see Fig.…”

Section: ) Pvs-based Lf Codingmentioning

confidence: 99%

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Dense Light Field Coding: A Survey

2020

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Light Field (LF) imaging is a promising solution for providing more immersive and closer to reality multimedia experiences to end-users with unprecedented creative freedom and flexibility for applications in different areas, such as virtual and augmented reality. Due to the recent technological advances in optics, sensor manufacturing and available transmission bandwidth, as well as the investment of many tech giants in this area, it is expected that soon many LF transmission systems will be available to both consumers and professionals. Recognizing this, novel standardization initiatives have recently emerged in both the Joint Photographic Experts Group (JPEG) and the Moving Picture Experts Group (MPEG), triggering the discussion on the deployment of LF coding solutions to efficiently handle the massive amount of data involved in such systems. Since then, the topic of LF content coding has become a booming research area, attracting the attention of many researchers worldwide. In this context, this paper provides a comprehensive survey of the most relevant LF coding solutions proposed in the literature, focusing on angularly dense LFs. Special attention is placed on a thorough description of the different LF coding methods and on the main concepts related to this relevant area. Moreover, comprehensive insights are presented into open research challenges and future research directions for LF coding. INDEX TERMS Camera array, image compression, light field, plenoptic, video compression.

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An efficient onboard compression method for multispectral images using distributed post-transform in the wavelet domain in conjunction with a fast spectral decorrelator

Liu

Tian

2019

Opt Rev

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Compression scheme of sub-images using Karhunen-Loeve transform in three-dimensional integral imaging

Cited by 25 publications

References 16 publications

Full Parallax 3D Video Content Compression

Full Parallax 3D Video Content Compression

Dense Light Field Coding: A Survey

An efficient onboard compression method for multispectral images using distributed post-transform in the wavelet domain in conjunction with a fast spectral decorrelator

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