本报告讨论了基于视觉任务性能的中间视觉方法 光度学，主要目的是建立适当的中间光谱灵敏度 函数作为中观测光系统的基础。回顾 最重要的视觉任务和视觉条件的范围 给出了在夜间驾驶环境中遇到的问题。介绍了现有的基于视觉性能的中间视觉测光系统 使用新的独立数据源进行审查和测试。会议的结果 分析和测试是基于 视觉表现。该报告总结了提出建议的理由 并给出了其使用和应用的一般指南。该出版物以英文写成，并附有法文和德文的简短摘要。

This report deals with visual task performance based approaches to mesopic photometry, with a major aim to establish appropriate mesopic spectral sensitivity functions to serve as the foundation of a system of mesopic photometry. A review of the most important visual tasks and the range of visual conditions typically encountered in the context of night-time driving is given.The existing visual performance based systems for mesopic photometry were reviewed and tested with new independent data sources. The outcome of the analysis and testing is a recommended system for mesopic photometry based on visual performance. The report summarises the justifications for the recommended system and gives general guidelines for its use and application.The publication is written in English, with a short summary in French and German.