本文档指定了一种基于图像的表示模型，该模型使用一组图像和可选的基础3D模型来表示目标对象/环境，以便在任意视点上准确高效地表示对象/环境。它适用于各种图形、虚拟现实和混合现实应用，这些应用需要使用各种对象和环境来表示场景。 本文件: —？定义基于图像的表示和三维重建技术的术语； —？指定基于图像的表示所需的元素； —？指定一种基于图像表示的方法来表示虚拟空间中的真实世界； —？指定如何将可见图像面片与底层三维模型集成，以从任意视点获得更精确和丰富的对象/环境表示； —？指定拟议模型如何允许多对象表示； —？提供了拟议表示模型的基于XML的规范和实际实现示例（见附录A）。

This document specifies an image-based representation model that represents target objects/environments using a set of images and optionally the underlying 3D model for accurate and efficient objects/environments representation at an arbitrary viewpoint. It is applicable to a wide range of graphic, virtual reality and mixed reality applications which require the method of representing a scene with various objects and environments. This document: —？defines terms for image-based representation and 3D reconstruction techniques; —？specifies the required elements for image-based representation; —？specifies a method of representing the real world in the virtual space based on image-based representation; —？specifies how visible image patches can be integrated with the underlying 3D model for more accurate and rich objects/environments representation from arbitrary viewpoints; —？specifies how the proposed model allows multi-object representation; —？provides an XML based specification of the proposed representation model and an actual implementation example (see Annex？A).