ILLUMINATION CONDITION TO PERCEIVE EXACT COLOR IN PICTURES

在日光照明下拍摄的照片可以在用钨灯照明的房间里观察到。观察者能看到摄影师所体验到的照片中的颜色吗？被识别的照明视觉空间RVSI的概念预测它不是这样的，并且必须针对预期的颜色感知对图片进行修改。本研究由三个实验组成。实验一：RVSI中识别轴的移动。采用简单的均匀白色刺激，在12种不同颜色的光照下对其颜色进行判断。在刺激中观察到与光照颜色近似相反的颜色，暗示RVSI的识别轴向光照颜色移动。实验2：老年人的颜色知觉和年轻观察者的颜色显示。APPR…观察室内的照明颜色更为理想，便于年轻观察者体验老年人所感受到的真实颜色。实验的原理、方法和结果与实验3相似，这里省略解释。实验3：感知图片中准确颜色的光照条件。为了在场景和观察室的光照条件不同时感受到场景的确切颜色，获得了图片的颜色修改量。在学习阶段，一名受试者在L光源照亮的房间里看了三分钟后，他/她转到了另一间用O光源照明的房间，这与L不同。幻灯片逐个投影。分别为20种不同色温的灯照明的学习室预先制作了幻灯片图片。受试者的任务是选择一张幻灯片，让他/她看起来像是学习室的颜色。结果表明，所选幻灯片的颜色是在XY色度图上介于L和O之间的照度下拍摄的照片。结果表明，当使用彩色照片向观察者演示场景的颜色时，摄影师应该准备好照片，就好像它是在摄影师所体验的照明颜色和用于观察的照明颜色之间的颜色的照明下拍摄的一样。较少

A photographic picture taken under daylight illumination may be observed in a room illuminated by a tungsten lamp. Does an observer sees the color in the picture that was experienced by the photographer? The concept of the recognized visual space of illumination RVSI predicts that it is not so and the picture must be modified for the intended color perception. We obtained the quantity how much modification is needed in the present research, It is composed of three experiments.Experiment 1 : Shift of recognition axis in RVSI.A simple stimulus of uniform white was employed and its color was judged under illumination of 12 different colors. The color approximately opponent to the color of illumination was observed in the stimulus to imply the shift of the recognition axis in the RVSI toward the illumination color.Experiment 2 : Color perception by aged and the color display for young observers.The color perception changes when people get older due to the yellowing crystalline lenses. Appr … More opriate color of the illumination in the observing room was obtained for young observes to experience the exact color perceived by the aged. The experimental principle, method and results are similar to Experiment 3 and the explanation is omitted here.Experiment 3 : Illumination condition to perceive exact color in pictures.The amount of modification in color for a picture was obtained in order that the exact color experienced for the scene is to be perceived when the illumination condition was different for the scene and for the observing room. A subject saw inside a room illuminated by L light source for three minutes in the learning phase and he/she moved to another room illuminated with O light source, which is different from L. There slides are projected one by one. The slide pictures were made beforehand for the learning room illuminated by lamp of twenty different color temperature respectively. The subject's task was to choose a slide that gave him/her the color appearance of the learning room. The results showed that the color of the slide chosen is a picture taken under the illumination of which color is just between L and O in the xy chromaticity diagram. The result implies that when one uses a color picture to demonstrate the color of a scene to an observer, the photographer should prepare the picture as if it was taken under the illumination of which color is in the midst between the color of illumination that the photographer experienced and the color of illumination for the observation. Less