produce the equivalent of 5000°K. The potential cost of inaccurate color rendition is
not worth the short term savings of economical lighting.
Finally, it is critical that all partners who evaluate color, or in any way contribute
to the color managed workflow, follow a strict maintenance schedule for their color
viewing stations. The spectral data at the surface of the viewing system/condition
should be routinely assessed using a photometer or spectro-radiometer.
Conclusion
Compliance with ISO 3664:2009 encompasses addressing multiple factors relating
both to the precise definition of the illuminant and to the specifics of the viewing
environment as they simultaneously converge, at the surface of viewing, in
interaction with the observer. While there is a great deal of discussion around the
Standard in relation to definition of the illuminant, it is important to note that the
totality of all specified components of ISO 3664:2009 interdependently comprise a
compliant, standardized lighting/viewing condition. In other words, full compliance
with ISO 3664:2009 is farther reaching than just upgrading light tubes. It also
involves regulating the intensity and uniformity of illumination, controlling
reflectance, ensuring the chromaticity value of the surround, managing ambient
influences, etc.—anything that may affect illumination of the viewing surface and
ultimately the reflected color of the object being viewed.10
Implementation of ISO 3664:2009 may seem complex but compliance with the
Standard is essential for accurate assessment and communication of critical color.
The viewing condition is one of the most overlooked aspects of color management. If
everyone is judging color by the same standard, production costs can be reduced
and post-production “disappointments” can be avoided. The key is ensuring that all
partners in the workflow strictly follow the requirements of the International
Standard.
To summarize:
— Standardized viewing conditions are critical for accurate color assessment and
essential for precise color communication.
— ISO 3664:2009 defines the spectral characteristics of the illuminant, the quality
of the light source, the quantity of illumination, and the physical viewing
conditions.
— One of the most notable changes in the newly revised color viewing Standard
for graphic technology and photography viewing conditions, is that the
10 Requirements for the surround of a viewing area and the backing of a viewed image are
specified in 4.2.4 of ISO3664:2009. The Standard also states that the backing (white or black)
shall be indentified when communicating the viewing condition for an image.
produce the equivalent of 5000°K. The potential cost of inaccurate color rendition isnot worth the short term savings of economical lighting.Finally, it is critical that all partners who evaluate color, or in any way contributeto the color managed workflow, follow a strict maintenance schedule for their colorviewing stations. The spectral data at the surface of the viewing system/conditionshould be routinely assessed using a photometer or spectro-radiometer.ConclusionCompliance with ISO 3664:2009 encompasses addressing multiple factors relatingboth to the precise definition of the illuminant and to the specifics of the viewingenvironment as they simultaneously converge, at the surface of viewing, ininteraction with the observer. While there is a great deal of discussion around theStandard in relation to definition of the illuminant, it is important to note that thetotality of all specified components of ISO 3664:2009 interdependently comprise acompliant, standardized lighting/viewing condition. In other words, full compliancewith ISO 3664:2009 is farther reaching than just upgrading light tubes. It alsoinvolves regulating the intensity and uniformity of illumination, controllingreflectance, ensuring the chromaticity value of the surround, managing ambientinfluences, etc.—anything that may affect illumination of the viewing surface andultimately the reflected color of the object being viewed.10Implementation of ISO 3664:2009 may seem complex but compliance with the
Standard is essential for accurate assessment and communication of critical color.
The viewing condition is one of the most overlooked aspects of color management. If
everyone is judging color by the same standard, production costs can be reduced
and post-production “disappointments” can be avoided. The key is ensuring that all
partners in the workflow strictly follow the requirements of the International
Standard.
To summarize:
— Standardized viewing conditions are critical for accurate color assessment and
essential for precise color communication.
— ISO 3664:2009 defines the spectral characteristics of the illuminant, the quality
of the light source, the quantity of illumination, and the physical viewing
conditions.
— One of the most notable changes in the newly revised color viewing Standard
for graphic technology and photography viewing conditions, is that the
10 Requirements for the surround of a viewing area and the backing of a viewed image are
specified in 4.2.4 of ISO3664:2009. The Standard also states that the backing (white or black)
shall be indentified when communicating the viewing condition for an image.
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