Study on pleasantness in visual environment

首先介绍了视觉愉悦感具有与热愉悦感相似的性质。本文指出愉快感是在眼睛适应状态发生变化时产生的。一个是比较白天场景和夜晚场景轮流重复的情况下和连续重复白天场景和夜晚场景的情况下被试对幻灯片投影的印象。在相同的场景中，前者的评价优于后者。在前一种情况下，受试者的瞳孔直径自然有很大的变化。这一结果支持了上述假设。另一系列实验是在各种光照条件下对石膏像进行造型评价。阐明了不仅应使用常规使用的矢量-标量比，而且还应使用标量照度。亮度感也与造型评价有关。当然，受试者的眼睛对瞳孔直径的适应状态是不同的，本研究以视觉环境中的愉悦感为例，阐明了眼睛适应与印象评价的关系。

It was firstly introduced that visual pleasantness had a property similar to thermal pleasantness, which the author developed formerly. It was pointed out that pleasantness occured, when adaptation state of eyes was changing.Two series of experiments were conducted. One was the comparison of impression of subjects to slide projection between the case where daytime scenes and night ones were repeated by turns and the case where each of daytime and night scenes was continuously repeated. The former case had better evaluation than the latter in the same scenes. In the former case, subjects' pupil diameter had large variation naturally. This result supported the above-mentioned hypothesis.Another series was experiment on modeling evaluation of a plaster figure under various lighting conditions. It was clarified that not only conventionally used vector-scalar ratio but also scalar illuminance should be used. Brightness feeling also was related with modeling evaluation. Naturally, the adaptation state of subjects' eyes expected from pupil diameter varied.Pleasantness in visual environment was shown as an example in this study and it was clarified that eye adaptation related to evaluation of impression.