信息技术——数据库语言——SQL多媒体和应用程序包第5部分:静态图像

[中文适用范围]： ISO/IEC 13249 本部分： a) 介绍 ISO/IEC 13249 的静止图像部分（所有部分）； b) 给出 ISO/IEC 13249 本部分所需的参考文献； c) 定义 ISO/IEC 13249 本部分特有的符号和约定； d) 定义 ISO/IEC 13249 本部分特有的概念； e) 定义静态图像用户定义类型及其相关例程。 ISO/IEC 13249 本部分中定义的静态图像用户定义类型遵循以下规定。 — 静态图像用户定义类型对于图像处理是通用的。 它解决了基于固有图像特征（例如高度、宽度和格式）以及基于图像特征（例如平均颜色、颜色直方图、位置颜色和纹理）来存储、管理和检索信息的需求。 它还解决了使用旋转、缩放以及相似性评估等操作的需求。 — 静止图像用户定义类型不会直接或与其他静止图像数据类型组合重新定义数据库语言 SQL。 静态图像用户定义类型适用于所有不同的图像格式。 然而，并非所有功能都可以与所有已知的静态图像格式一起使用。 ISO/IEC 13249 这部分的实施可能存在于还支持信息和内容管理、决策支持、数据挖掘和数据仓库系统的环境中。 ISO/IEC 13249 本部分实施所涉及的应用领域包括但不限于图形、多媒体、科学研究和医学。 [外文原描述]： ISO/IEC 13249-5:2003: introduces the still image part of ISO/IEC 13249 (all parts);gives the references necessary for ISO/IEC 13249-5:2003;defines notations and conventions specific to ISO/IEC 13249-5:2003;defines concepts specific to ISO/IEC 13249-5:2003;defines the still image user-defined types and their associated routines. The still image user-defined types defined in ISO/IEC 13249-5:2003 adhere to the following. A still image user-defined type is generic to image handling. It addresses the need to store, manage and retrieve information based on aspects of inherent image characteristics such as height, width and format and based on image features such as average color, color histogram, positional color and texture. It also addresses the need to employ manipulation such as rotation, scaling as well as similarity assessment.A still image user-defined type does not redefine the database language SQL directly or in combination with another still image data type. The still image user-defined types are applicable to all different image formats. However, not all functionality can be used with all known still image formats. An implementation of ISO/IEC 13249-5:2003 may exist in environments that also support information and content management, decision support, data mining and data warehousing systems. Application areas addressed by implementations of ISO/IEC 13249-5:2003 include, but are not restricted to, graphics, multimedia, scientific research and medicine.