ISO/IEC 21794-4:2022 情報技術—プレノプティック画像コーディングシステム（JPEG Pleno）— Part 4: リファレンスソフトウェア | ページ 2

Foreword

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This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.

A list of all parts in the ISO/IEC 21794 series can be found on the and IEC websites.

Introduction

This document is part of a series of standards for a system known as JPEG Pleno. The ISO/IEC 21794 series aims to provide a standard framework for representing new imaging modalities. It facilitates the capture, representation, exchange and visualization of plenoptic imaging modalities. A plenoptic image modality can be a light field, point cloud or hologram, which are sampled representations of the plenoptic function in the form of, respectively, a vector function that represents the radiance of a discretized set of light rays, a collection of points with position and attribute information, or a complex wavefront. The plenoptic function describes the radiance in time and in space obtained by positioning a pinhole camera at every viewpoint in 3D spatial coordinates, every viewing angle and every wavelength, resulting in a 7D function.

JPEG Pleno is designed primarily to facilitate the capture, representation, exchange and visualization of point cloud, light field, and holographic imaging approaches. It specifies tools for coding these approaches while providing advanced functionality at the system level such as support for data and metadata manipulation, editing, random access and interaction, protection of privacy and ownership rights as well as other security mechanisms.

This document provides reference software implementations of ISO/IEC 21794-1 and ISO/IEC 21794-2 that demonstrate the features and capabilities of JPEG Pleno for coding light field data. Its purpose is to act as a guideline for implementations and as a reference for conformance testing. As such, the implementations are conforming to ISO/IEC 21794-1, i.e. it implements the structure of a JPL file which includes the concepts of boxes. In addition, the reference software implementations also cover ISO/IEC 21794-2, i.e. light-field coding.

This document includes the source code for reference implementations of ISO/IEC 21794-1 and ISO/IEC 21794-2 as electronic attachments. They have been successfully compiled and tested on Linux^®1 operating system at the time of writing.

Instructions for unpacking and building the software are found in Annexes A. Instructions for its use are listed in Annexes B and C.

1 Scope

This document provides reference implementations of ISO/IEC 21794-1 and ISO/IEC 21794-2, also known as JPEG Pleno.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document the terms and definitions given in ISO/IEC 21794-1, in ISO/IEC 21794-2, in ISO/IEC 21794-3, and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses: