https://wiki.yanding.com/ 2026-07-11T05:33:21+00:00 https://wiki.yanding.com/ https://wiki.yanding.com/lib/tpl/myconfluence/images/favicon.ico text/html 2026-07-10T08:02:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:basic_color_processing&rev=1783670564&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Basic Color Processing Digital cameras can capture color images, but the color processing in a camera is a highly complex and crucial process. text/html 2026-07-10T08:02:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:cie_colorimetric_system&rev=1783670561&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) CIE Colorimetric System 1. History and Fundamentals In the early 19th century, it was discovered that the human eye has three types of cells for color perception. It was also known that two lights with different spectra could produce the same color (metamerism). It was hypothesized that each cone cell has a spectral sensitivity corresponding to R, G… text/html 2026-07-10T08:02:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:cie_standard_illuminants&rev=1783670560&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) CIE Standard Illuminants CIE Standard Illuminants are “theoretical spectral power distribution (SPD) data$M_{e,\lambda}$$(1/3, 1/3)$ text/html 2026-07-10T08:02:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:color_gamut&rev=1783670563&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Do Digital Cameras Have a Color Gamut? With the increasingly widespread application of digital images, the colorimetric term text/html 2026-07-10T08:02:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:color_rendering&rev=1783670562&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Color Rendering I. What is Color Rendering Color rendering refers to the ability of a light source to reproduce the true colors of objects compared to a standard light source (i.e., the degree of color fidelity of the objects). The standard light source is based on the CIE (International Commission on Illumination) standard illuminants, with natura… text/html 2026-07-10T08:02:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:cri_ra_vs_ri&rev=1783670563&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Difference Between Color Rendering Index Ra and Ri In fields such as lighting design, color management, and image creation, the color rendering index is a core metric for evaluating a light source's ability to reproduce object colors. $$R_i = 100 - 4.6 \Delta E$$$ \Delta E_i$$ \Delta E_i$$R_{i}$$$Ra =\frac{(R₁+R₂+R₃+R₄+R₅+R₆+R₇+R₈)}{8}$$… text/html 2026-07-10T08:02:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:luminance_equation&rev=1783670561&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) How is the luminance equation used for converting color images to grayscale images determined? Overview$\bar{x}(\lambda),\bar{y}(\lambda),\bar{z}(\lambda)$$\rm{C}= \begin{bmatrix} x_{[R]} & x_{[G]} & x_{[B]} \\ y_{[R]} & y_{[G]} & y_{[B]} \\ z_{[R]} & z_{[G]} & z_{[B]} \end{bmatrix} = \begin{bmatrix} 0.67 & 0.21 & 0.14 \\ 0.33 & 0.71 & 0.08 \\ 0.00 … text/html 2026-07-10T08:02:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.yanding.com/doku.php?id=en:yanding:imaging_basics:optics:colorimetry:metamerism&rev=1783670562&do=diff FIXME This page is not fully translated, yet. Please help completing the translation. (remove this paragraph once the translation is finished) Is Metamerism Far Removed from Our Daily Lives? Metamerism is a colorimetric term used to describe the phenomenon where color stimuli with different spectral compositions produce the same color perception (i.e., have the same tristimulus values). The English word for this is