ICS33.160.25 M74 世界超高清视频产业联盟发布2024-06-04发布 2024-06-04实施高动态范围（HDR）静态图像第1部分：双 层格式 Specification Highdynamicrange（HDR）stillimagesPart1:Dual-layerformat （V1.0）T/UWA028.1—2024世界超高清视频产业联盟标准 全国团体标准信息平台 IT/UWA028.1-2024 目次 前 言............................................................................................................................................................II 引 言...........................................................................................................................................................III 1范围...................................................................................................................................................................1 2规范性引用文件...............................................................................................................................................1 3术语和定义.......................................................................................................................................................1 4缩略语...............................................................................................................................................................2 5符号与运算.......................................................................................................................................................3 6HDR静态图像的双层分发格式端到端系统.................................................................................................9 7元数据.................................................................................................................................................................9 7.1HDR图像元数据......................................................................................................................................9 7.2双层分发格式元数据..............................................................................................................................11 7.2.3静态元数据语义（StaticMetadata）......................................................................................................14 7.2.4动态元数据语义（DynamicMetadata）.................................................................................................14 8双层分发格式元数据封装..............................................................................................................................14 8.1动态范围扩展标识...................................................................................................................................14 8.2动态范围扩展处理...................................................................................................................................14 8.2.1动态范围扩展处理元数据主要部分....................................................................................................14 9双层分发格式文件格式..................................................................................................................................18 9.1概述............................................................................................................................................................18 9.2JPEG双层分发格式..................................................................................................................................18 9.3HEIF双层分发格式...................................................................................................................................23 10获取HDR图像..............................................................................................................................................27 10.1从基本图像数据获取显示所需的HDR图像的过程..........................................................................27 10.2从双层分发格式获取HDR图像的过程...............................................................................................28 11获取SDR图像...............................................................................................................................................33 11.1从HDR图像获取SDR图像的过程.....................................................................................................33 11.2从双层分发格式