Art / Photography

The Dimensions of Color, a site developed by David Briggs. A well illustrated site on light, color, and its perception. The content is a course in applied color science optimized for artists but useful for all. The language is clear, with just a few simple equations and lots of descriptions. http://www.huevaluechroma.com For artists interested in understanding the technical foundations of all aspects of watercolor painting: papers, brushes, paints, color theory, painting techniques, and more. The site's author, Bruce MacEvoy, also has another site devoted to color theory, but this one more technical in nature. http://www.handprint.com/HP/WCL/water.html A site by a photographer, Norman Koren, for photographers who want to get the maximum from the medium and who are eager to learn. From film grain to inkjet inks, all aspects of traditional and digital photography are discussed. See also the link in the  Technical sites section below for his great camera analysis program "Imatest". http://www.normankoren.com

Color museum

Most likely the first virtual color museum. An extraordinary multi-lingual site on the perception, description and characterization of color. Contains a description of almost all color systems known since Pythagoras. http://www.colorsystem.com/?lang=en

Color / Photography Forums

Here are forum sites dedicated to photography where you will also find help on color related subjects and equipment. Beside being free, you will find there many knowledgeable participants and moderators. Digital Grin http://www.dgrin.com Digital Photography Review (dpreview) http://www.dpreview.com/forums/ Luminous Landscape Forums http://forum.luminous-landscape.com/ Open Photography Forums http://www.openphotographyforums.com/index.php

Instrument manufacturers

Here is a list of manufacturers specialized in light and color measurement instruments, with an emphasis on instruments dedicated to the print and paint industries. Barbieri electronic: Mid-range industrial instruments: spectrophotometers in reflection/transmission, densitometers, and customized products. http://www.barbierielectronic.com   basICColor: DISCUS: Professional Lab-Grade Colorimeter for Soft Proofing. http://www.basiccolor.de    BYK Gardner: Mid-range industrial and laboratory instruments: spectrophotometers, light booths, gloss meters, haze meters, orange peel / DOI meters. Color appearance measurement instruments Color measurement instruments Tutorials in Appearance and Color measurement   Datacolor: Wide instrument range, from consumer to laboratory: colorimeters, spectrophotometers, light booths. http://www.datacolor.com SpyderBLOG (articles, webinars)   JETI: Mid-range instruments for industrial and laboratory use: radiometer, spectrophotometer, spectrocolorimeter. http://www.jeti.com   Konica-Minolta: Wide instrument range, from consumer to laboratory: colorimeters, spectrophotometers, spectrodensitometers, gloss meters, light booths, radiometers, illuminance meters, luminance meters, etc. Light measuring technologies   Ocean Optics: Full line of miniature fiber-optics based spectrometers for laboratory use. http://www.oceanoptics.com    Photo Research: High-end instruments for industrial and laboratory use: spectroradiometers, photometers, video photometers. http://www.photoresearch.com    Techkon: Mid-range instruments for industrial use: plate measurement device, spectrophotometers, spectrodensitometers. http://www.techkon.com    X-Rite/GretagMacbeth: Wide instrument range, from consumer to laboratory: colorimeters, spectrophotometers, spectrodensitometers, light booths. http://www.xrite.com On-line eLearning Training, technical support, profiling services

RGB spaces sites

Numerical data for all RGB spaces available in BabelColor is directly available trough its "Data" menu (click here for the list of RGB spaces). The information includes the coordinates of the primaries and the illuminant, gamma, as well as the XYZ to RGB and RGB to XYZ matrices. A short description of each space is also included in the help manual. The following sites contain additional information on the six spaces that were designed by individuals (as opposed to international committees). BestRGB and DonRGB4, two spaces dedicated for film based photography. Defined by Don Hutcheson. Look in the "Free" section of his site. http://www.hutchcolor.com/profiles.html Beta RGB, a space defined by Bruce Lindbloom to maximize the coverage of the visible spectrum (L*a*b* gamut efficiency) and, unlike ProPhoto, maximize the amount of RGB combinations corresponding to visible colors (Encoding Efficiency). http://www.brucelindbloom.com/BetaRGB.html Bruce RGB, created in Bruce Fraser in 1998, a compromise between ColorMatch and Adobe (1998). Designed to maximize the gamut while providing good edit precision in 8 bit per pixel images. http://creativepro.com/out-of-gamut-finessing-photoshop-color/ eciRGB, developed by the European Color Initiative, a group of experts dedicated to advancing media-neutral color data-processing in digital publishing systems. Dedicated for printing presses. http://www.eci.org/en/colourstandards/workingcolorspaces Ekta Space PS5, a space designed by Joseph Holmes to match the gamut of Ektachrome transparency film. Also works well with color negatives. http://www.josephholmes.com/profiles.html

Technical sites

The Imatest Web site. A commercial site with extensive background information on target testing. Imatest offers a suite of programs to test the sharpness and image quality of lenses, and evaluate the color rendering and image noise of cameras, using inexpensive, widely available targets. It consists of three modules, including one dedicated to owners of the ColorChecker target. http://www.imatest.com José Pereira's Digital Heritage Web site, in Spanish, covers the application of color management in the digitalization of cultural heritage. You will find numerous articles on the use of all sorts of targets and tools in photography (18% grey targets, ColorChecker, QPcard 201, etc.) as well as software reviews. Sitio web sobre Patrimonio Digital, de José Pereira en español. Esta especializado en temas de gestión del color aplicado al campo de la digitalización del patrimonio cultural. Encontrará numerosos artículos sobre el uso de todo tipo de cartas de color y herramientas (cartas de grises, ColorChecker, QPCard, etc) así como diversas evaluaciones de software. http://www.jpereira.net Bruce Lindbloom's Web site, a very complete and accurate site on the mathematics of colorimetry, with numerous interactive applets, equations, tables, etc. Very professional. http://www.brucelindbloom.com The Munsell Color Science Laboratory (MCSL), one of the world's premier academic laboratories dedicated to the science of color. Its "Resources" section offers a significant amount of information on color theory as well as files of the Munsell "renotation" data. http://www.rit.edu/cos/colorscience Marcel Patek Digital Photography Web site. This site presents the technical aspects of digital photography, with a mix of well- presented theory and software tips on many programs dedicated to color management (including CT&A and PatchTool !). http://www.marcelpatek.com  Charles Poynton, a well known and often quoted color expert with its famous color and gamma FAQs. http://www.poynton.com Color vision, a very personal review of color theory by Bruce MacEvoy. This site covers all aspects of color perception with illustrated examples. A must read, but be ready to spend a lot of time since there is a lot of content. http://www.handprint.com/LS/CVS/color.html The Dimensions of Color, a site developed by David Briggs. A well illustrated site on light, color, and its perception. The content is a course in applied color science optimized for artists but useful for all. The language is clear, with just a few simple equations and lots of descriptions. http://www.huevaluechroma.com
BabelColor ®
Color Measurement and Analysis

White balance

Ron Bigelow has a nice web site dedicated to photography. His articles are easy to read and informative. In particular, you will find a well illustrated presentation on the use of white balance adjustments and many articles related to RAW files. http://ronbigelow.com An educational article on white balance for microscopy applications, from Nikon, where we see that the microscopic world can have the same problems as the macroscopic world in terms of color accuracy. http://www.microscopyu.com

Art / Photography

The Dimensions of Color, a site developed by David Briggs. A well illustrated site on light, color, and its perception. The content is a course in applied color science optimized for artists but useful for all. The language is clear, with just a few simple equations and lots of descriptions. http://www.huevaluechroma.com For artists interested in understanding the technical foundations of all aspects of watercolor painting: papers, brushes, paints, color theory, painting techniques, and more. The site's author, Bruce MacEvoy, also has another site devoted to color theory, but this one more technical in nature. http://www.handprint.com/HP/WCL/water.html A site by a photographer, Norman Koren, for photographers who want to get the maximum from the medium and who are eager to learn. From film grain to inkjet inks, all aspects of traditional and digital photography are discussed. See also the link in the  Technical sites section below for his great camera analysis program "Imatest". http://www.normankoren.com

Color museum

Most likely the first virtual color museum. An extraordinary multi-lingual site on the perception, description and characterization of color. Contains a description of almost all color systems known since Pythagoras. http://www.colorsystem.com/?lang=en

Color / Photography Forums

Here are forum sites dedicated to photography where you will also find help on color related subjects and equipment. Beside being free, you will find there many knowledgeable participants and moderators. Digital Grin http://www.dgrin.com Digital Photography Review (dpreview) http://www.dpreview.com/forums/ Luminous Landscape Forums http://forum.luminous-landscape.com/ Open Photography Forums http://www.openphotographyforums.com/index.php

Instrument manufacturers

Here is a list of manufacturers specialized in light and color measurement instruments, with an emphasis on instruments dedicated to the print and paint industries. Barbieri electronic: Mid-range industrial instruments: spectrophotometers in reflection/transmission, densitometers, and customized products. http://www.barbierielectronic.com   basICColor: DISCUS: Professional Lab-Grade Colorimeter for Soft Proofing. http://www.basiccolor.de    BYK Gardner: Mid-range industrial and laboratory instruments: spectrophotometers, light booths, gloss meters, haze meters, orange peel / DOI meters. Color appearance measurement instruments Color measurement instruments Tutorials in Appearance and Color measurement   Datacolor: Wide instrument range, from consumer to laboratory: colorimeters, spectrophotometers, light booths. http://www.datacolor.com SpyderBLOG (articles, webinars)   JETI: Mid-range instruments for industrial and laboratory use: radiometer, spectrophotometer, spectrocolorimeter. http://www.jeti.com   Konica-Minolta: Wide instrument range, from consumer to laboratory: colorimeters, spectrophotometers, spectrodensitometers, gloss meters, light booths, radiometers, illuminance meters, luminance meters, etc. Light measuring technologies   Ocean Optics: Full line of miniature fiber-optics based spectrometers for laboratory use. http://www.oceanoptics.com    Photo Research: High-end instruments for industrial and laboratory use: spectroradiometers, photometers, video photometers. http://www.photoresearch.com    Techkon: Mid-range instruments for industrial use: plate measurement device, spectrophotometers, spectrodensitometers. http://www.techkon.com    X-Rite/GretagMacbeth: Wide instrument range, from consumer to laboratory: colorimeters, spectrophotometers, spectrodensitometers, light booths. http://www.xrite.com On-line eLearning Training, technical support, profiling services

RGB spaces sites

Numerical data for all RGB spaces available in BabelColor is directly available trough its "Data" menu (click here for the list of RGB spaces). The information includes the coordinates of the primaries and the illuminant, gamma, as well as the XYZ to RGB and RGB to XYZ  matrices. A short description of each space is also included in the help manual. The following sites contain additional information on the six spaces that were designed by individuals (as opposed to international committees). BestRGB and DonRGB4, two spaces dedicated for film based photography. Defined by Don Hutcheson. Look in the "Free" section of his site. http://www.hutchcolor.com/profiles.html Beta RGB, a space defined by Bruce Lindbloom to maximize the coverage of the visible spectrum (L*a*b* gamut efficiency) and, unlike ProPhoto, maximize the amount of RGB combinations corresponding to visible colors (Encoding Efficiency). http://www.brucelindbloom.com/BetaRGB.html Bruce RGB, created in Bruce Fraser in 1998, a compromise between ColorMatch and Adobe (1998). Designed to maximize the gamut while providing good edit precision in 8 bit per pixel images. http://creativepro.com/out-of-gamut-finessing- photoshop-color/ eciRGB, developed by the European Color Initiative, a group of experts dedicated to advancing media- neutral color data-processing in digital publishing systems. Dedicated for printing presses. http://www.eci.org/en/colourstandards/workingcolo rspaces Ekta Space PS5, a space designed by Joseph Holmes to match the gamut of Ektachrome transparency film. Also works well with color negatives. http://www.josephholmes.com/profiles.html

Technical sites

The Imatest Web site. A commercial site with extensive background information on target testing. Imatest offers a suite of programs to test the sharpness and image quality of lenses, and evaluate the color rendering and image noise of cameras, using inexpensive, widely available targets. It consists of three modules, including one dedicated to owners of the ColorChecker target. http://www.imatest.com José Pereira's Digital Heritage Web site, in Spanish, covers the application of color management in the digitalization of cultural heritage. You will find numerous articles on the use of all sorts of targets and tools in photography (18% grey targets, ColorChecker, QPcard 201, etc.) as well as software reviews. Sitio web sobre Patrimonio Digital, de José Pereira en español. Esta especializado en temas de gestión del color aplicado al campo de la digitalización del patrimonio cultural. Encontrará numerosos artículos  sobre el uso de todo tipo de cartas de color y herramientas (cartas de grises, ColorChecker, QPCard, etc) así como diversas evaluaciones de software. http://www.jpereira.net Bruce Lindbloom's Web site, a very complete and accurate site on the mathematics of colorimetry, with numerous interactive applets, equations, tables, etc. Very professional. http://www.brucelindbloom.com The Munsell Color Science Laboratory (MCSL), one of the world's premier academic laboratories dedicated to the science of color. Its "Resources" section offers a significant amount of information on color theory as well as files of the Munsell "renotation" data. http://www.rit.edu/cos/colorscience Marcel Patek Digital Photography Web site. This site presents the technical aspects of digital photography, with a mix of well-presented theory and software tips on many programs dedicated to color management (including CT&A and PatchTool !). http://www.marcelpatek.com  Charles Poynton, a well known and often quoted color expert with its famous color and gamma FAQs. http://www.poynton.com Color vision, a very personal review of color theory by Bruce MacEvoy. This site covers all aspects of color perception with illustrated examples. A must read, but be ready to spend a lot of time since there is a lot of content. http://www.handprint.com/LS/CVS/color.html The Dimensions of Color, a site developed by David Briggs. A well illustrated site on light, color, and its perception. The content is a course in applied color science optimized for artists but useful for all. The language is clear, with just a few simple equations and lots of descriptions. http://www.huevaluechroma.com
BabelColor ®

White balance

Ron Bigelow has a nice web site dedicated to photography. His articles are easy to read and informative. In particular, you will find a well illustrated presentation on the use of white balance  adjustments and many articles related to RAW files. http://ronbigelow.com An educational article on white balance for microscopy applications, from Nikon, where we see that the microscopic world can have the same problems as the macroscopic world in terms of color accuracy. http://www.microscopyu.com