1999年9月30日至10月2日在布达佩斯匈牙利科学院举行了CIE 1999年研讨会，庆祝CIE光度系统75周年。论文讨论了目前的光度系统，并讨论了其缺点和可能的扩展。提交的论文和讨论清楚地表明，已有75年历史的光度系统仍然是所有视觉显著光测量的国际公认基础。它定义了国际单位制的一个基本单位坎德拉，因此它在未来也应该具有永久性地位。然而，贡献指出，自1924年以来，取得了巨大的进步，只是部分地进入了CIE的建议和标准。现在已经很清楚，人们必须区分中心凹视觉测光法（当看到和识别小细节很重要时使用）和可以帮助照明工程师描述副中心凹视觉、照明环境中的亮度感知和中间视觉的测光法。 在开始组织CIE第2部门的会议时，Hengstberger博士作了介绍，他现在是负责出版的副总裁。会议的重点是:视觉研究领域的领先科学家之一瓦尔伯格教授介绍了基础视觉研究，该研究使基于闪烁光度法的V（λ）和对手颜色通道影响的亮度感知之间的差异变得可以理解。McGowan博士的论文讨论了光度法在灯具行业中的应用。雷亚教授讨论了基于V（λ）的光度测量法在中央凹任务识别中的适用性，也在中间视觉范围内，以及对副中央凹视觉的可能扩展，在中间视觉水平上，基于10度观察者的光度测量法似乎是必要的。光度学在室内设计中很重要，这一问题以及为满足室内设计师的要求而对现有光度学系统进行的一些必要扩展，已由教授处理。 爱。Blevin博士和Wallard博士的论文解释了CIE和Meter Convention之间的相互作用，以及新的科学成果如何进入国际单位和度量体系。Walraven博士报告了CIE TC 1-36在推荐基本色度图方面取得的进展，并为将V（λ）函数扩展到红外领域提供了数据。CIE部门1的主管Sagawa博士在他的闭幕论文中展示了未来光度计的愿景，这是一种图像光度计，您可以根据要检查的实际任务在多个评估功能之间切换。

The 1999 Symposium of the CIE was held at the Hungarian Academy of Sciences, Budapest, between 30 September and 2 October 1999, celebrating the 75th anniversary of the CIE photometric system. Papers dealt with the present photometric system, and discussed its shortcomings and possible extensions.The presented papers and discussions made it clear that the 75 year old photometric system is still the internationally accepted basis for all visually significant light measurements. It defines one of the base units of the SI system, the candela, and as such it should have a permanent status also in the future. Contributions pointed out, however, that since 1924 great progress has been achieved that found only partly its way into CIE recommendations and standards. By now it is clear that one has to differentiate between foveal vision photometry, to be used when it is important to see and recognise small details, and a photometry that can help illuminating engineers to describe parafoveal vision, brightness perception in the lit environment and mesopic vision.An introduction was presented by Dr. Hengstberger, at the time of starting the organization of the meeting Director of CIE Division 2 and now Vice President for Publications. Highlights of the meeting were: Professor Valberg, one of the leading scientists in vision research, described underlying vision research that makes the difference between flicker photometry based V(lambda) and opponent colour channel influenced brightness perception understandable. Dr. McGowan's paper discussed the application of photometry in lamp industry. Prof. Rea dealt with the applicability of V(lambda) based photometry for foveal recognition of tasks, also in the mesopic range, and possible extensions for parafoveal vision, where at mesopic levels a photometry based on a 10 degree observer with rod participation seems to be necessary. Photometry is important in interior design, this question and some of the necessary extensions of the present photometric system to cope with the requests interior designers have were dealt with by Prof. Loe. Papers by Dr. Blevin and Dr. Wallard explained the interaction between CIE and the Meter Convention and how new scientific results could find their way into the system of international units and measures. Dr. Walraven reported on the progress CIE TC 1-36 made to recommend a fundamental chromaticity diagram, and to provide data for the extension of the V(lambda) function into the infrared. Dr. Sagawa, Director of CIE Division 1 showed in his closing paper the vision of a future photometer, which is an image photometer, where you can switch among a number of evaluation functions, depending on the actual task to be checked.