Agfa IT8.7/2 Set - Marszalec (n.d.)

<strong>Source URL</strong>: http://www.uef.fi/web/spectral/agfa-it8.7/2-set The Agfa ColorReference is designed according to the IT8.7 standard.The standard defines the layout and colorimetric values of an input test target that allows any color scanner to be calibrated with any photographic medium dye set. The IT8 target was designed by the ANSI IT8 subcommittee to be used for both calibration by visual comparison and as a numerical data target. Each ColorReference consist of 288 patches, and has been designed to represent the color space from full saturation to near neutrals at highlight, midtone, and shadows.Hues falling at regular intervals through the color space represent a full spectrum gamut. A linear perception neutral density scale, and CMY and RGB color dye scales provide basic reference points to check for gray balance, tone reproduction, and color correction. Finally, a vendor-optional area containing flesh colors based on the colorimetric measurements of various skin tones plus the colors of nature completes the ColorReference. The spectral reflectance of samples were measured with Minolta spectro- photometer with option SCE (Specular component excluded). The CM-2002 utilizes d/8 (diffuse illumination/8o viewing) geometry which conforms to ISO and DIN standards (and also to CIE d/0 recommendations). Measuring equipment: Minolta spectrofotometer CM-2002.<br> Wavelength interval: 400 nm - 700 nm.<br> Wavelength resolution: 10 nm.**来源网址**：http://www.uef.fi/web/spectral/agfa-it8.7/2-set 爱克发色彩参考卡（Agfa ColorReference）依据IT8.7标准设计。该标准明确了输入型测试靶标的布局与比色参数，可实现任意彩色扫描仪与任意摄影介质染料组的适配校准。IT8测试靶标由美国国家标准学会（ANSI）IT8分委员会设计，既可通过目视比对完成校准，亦可作为数值数据靶标使用。每一张色彩参考卡包含288个色块，其设计覆盖了高光、中间调与阴影区域内从全饱和色至近中性色的全部色彩空间。色彩空间内按固定间隔排布的色相构成了完整的色域光谱。线性感知中性密度色阶、CMY（青、品、黄）与RGB（红、绿、蓝）染料色阶提供了基础参考点位，可用于校验灰平衡、色调再现与色彩校正效果。本色彩参考卡还设有厂商可选区域，收录了基于多种肤色比色测量所得的肤色与自然景物色彩。样本的光谱反射率通过美能达分光光度计测得，测试采用SCE（镜面反射分量排除，Specular Component Excluded）模式。CM-2002型分光光度计采用符合ISO、DIN标准（同时契合CIE d/0建议）的d/8（漫射照明/8°观测）几何测量构型。测量设备：美能达CM-2002型分光光度计。<br> 波长区间：400 nm 至 700 nm。<br> 波长分辨率：10 nm。