ILLUMINATION CONDITION TO PERCEIVE EXACT COLOR IN PICTURES

感知图片中准确颜色的照明条件

• 批准号: 10650047
• 负责人: IKEDA Mitsuo
• 金额: $ 0.7万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650047/
• 关键词: color reproduction; color perception; photography; picture taking; observation; color constancy; recognized visual space; illumination; 撮影; 観測; 証明認識視空間; 色画像; 色順応

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

可以在用钨丝灯照明的房间里观察在日光照射下拍摄的照片。观察者在照片中看到的颜色是摄影师所经历的吗？照明RVSI的识别视觉空间的概念预测，它不是这样的，图片必须修改，以预期的颜色感知。我们得到了在本研究中需要多少改性的量，它由三个实验组成。实验1:RVSI中识别轴的移位。采用均匀白色的简单刺激，在12种不同颜色的照明下判断其颜色。在刺激中观察到与照明颜色近似相反的颜色，暗示RVSI中识别轴向照明颜色移动。实验二：老年人色彩感知与青少年色彩显示。随着年龄的增长，由于晶状体变黄，人们对颜色的感知会发生变化。观察室照明的颜色更适合年轻的观测者，以体验老年人所感知的颜色。实验原理、方法和结果与实验3相似，略去说明。实验三：感知图像中准确颜色的照明条件。当场景和观察室的照明条件不同时，获得图像的颜色修改量是为了感知场景所经历的确切颜色。在学习阶段，受试者在L光源照射的房间内观看3分钟，然后转移到另一个与L光源照射不同的O光源的房间，幻灯片依次放映。在学习室内，分别用20种不同色温的灯照明，事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/她看到学习室的颜色外观。结果表明，所选择的幻灯片的颜色是在xy色度图中L和O之间的颜色的照明下拍摄的照片。结果表明，当一个人用彩色照片向观察者展示一个场景的颜色时，摄影师应该把照片准备得好像它是在摄影师体验到的照明颜色和观察到的照明颜色之间的照明颜色的照明下拍摄的。少

项目成果

H.Hattori, M.Ikeda, H.Shinoda: "Method of displaying exact colored scenes perceived by the aged"Proc. AIC Midterm, Warsaw. 109-114 (1999)

H.Hattori、M.Ikeda、H.Shinoda：“显示老年人感知的精确彩色场景的方法”Proc。

H.Hattori,M.Ikeda,H.Shinoda: "Method of Displaying Exact Colored Scens Perceived by the Aged"Proc.AIC Midterm,Warsaw. 109-114 (1999)

H.Hattori、M.Ikeda、H.Shinoda：“显示老年人感知的精确彩色场景的方法”Proc.AIC 期中考试，华沙。

H.Hattori, M.Ikeda, H.Shinoda: "Method of Displaying Exact colored Scenes Perceived by Aged"Proc. AIC Midterm Meeting, Warsaw. 109-114 (1999)

H.Hattori、M.Ikeda、H.Shinoda：“显示老年人感知的精确彩色场景的方法”Proc。