BS ISO IEC 17823:2015 pdf free download – Colour terminology for office colour equipment.
This International Standard provides definitions for colour terms used with office equipment,inparticular for use with colour scanning and printing devices that have digital imaging capabilities,including multi-function devices.
This International Standard is not intended to replace terms and definitions published in documents oruser interfaces issued or created by manufacturers.
2Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
colour balance
adjustment of colour channel gains or processing
2.1.1
grey balance
set of tone values for cyan, magenta and yellow that are expected to appear as an achromatic grey underspecified viewing conditions when printed using the specified printing conditions
Note 1 to entry: The user can choose between the following two practical definitions and one theoreticaldefinition of grey, depending upon the particular context.
a)practical definitions:
1) a colour having the same CIELAB a* and b* values as the print substrate;
2) a colour that has the same CIELABa*and b* values as a half-tone tint of similar L* value printed with black ink;
b)theoretical definition:
1) the colourimetric definition of grey is when the CIELAB a* and b*values are both equal to 0.[SOURCE: ISO/TS 10128:2009,3.3, modified]
2.2 black
2.2.1
composite black
printing black with multiple colourants
2.2.2
pure black
black generated only in black colourant in a printing device
2.2.3
rich black
black generated by a mixture of black colourant and other colourants in a printing device
2.3
calibration
set of operations that establish， under specified conditions,the relationship between values ofquantities indicated by a measuring instrument or measuring system, or values represented by amaterial measure or a reference material, and the corresponding values realized by standards
[SOURCE: ISO 14807:2001,3.11]
2.4
colour appearance
aspect of visual perception by which things are recognized by their colour[SOURCE:CIE S17/E:2011 ILV,17-199, modified—“2.” part has been removed.]
2.4.1
brightness
attribute of a visual perception according to which an area appears to emit, or reflect, more or less light[SOURCE: CIE S17/E:2011 ILV,17-111]
2.4.2
colourfulness
attribute of a visual sensation according to which the perceived colour of an area appears to be more orless chromatic
[SOURCE: ISO/IEC 8613-2:1995]
2.4.3
highlight colour
especially light and low chroma colour
2.4.4
metamerism
phenomenon characterized by the difference in colour observed when two specimens visually matchingunder a given light source are viewed under another light source with different spectral characteristics[SOURCE: ISO 4618:2014,2.157]
2.4.5
vividness
attribute of colour used to indicate the degree of departure of the colour from a neutral black colour
2.5
colour difference
perceived dissimilarity between two colour elements[SOURCE: CIE S17/E:2011 ILV,17-206]
2.6colour encoding
2.6.1
colour palette
fixed set or range of available colours that can be selected[SOURCE: ISO/TS 16071:2003,3.8]
2.6.2
full colour
method of representing colours with 3-channel or more, and each channel has 8-bit or more information
2.6.3
indexed colourpalette colour
colour selection scheme in which the colour index is used to retrieve colour values from a colour table
[SOURCE: ISO/1EC 8632-1:1999,4.1.62]
2.6.4
named colour
colour with associated colour expression specification
2.6.5
spot colour
single colourant, identified by name, whose printing tone-values are specified independently from thecolour values specified in a colour coordinate system
[SOURCE: ISO 12639:2004,4.1.10]
2.7
colour management
communication of the associated data required for unambiguous interpretation of colour content data,and application of colour data conversions, as required, to produce the intended reproductions.BS ISO IEC 17823 pdf download.