DE07/DE07.HTM Transformation of CIELAB colour s of standard TV to the digital codes olv*, cmy* and sRGB

Transformation of CIELAB colour codes of standard TV colours to the digital codes olv*, cmy* and sRGB

Test intention for colour codes:

The CIELAB data of the television colour space (compare DIS ISO/IEC 19839-1:2000-04, Table 9 and 10) are used to transfer to the colour codes of different colour spaces. The sRGB codes are in general incompatible with the CIELAB codes, e. g. a colour with the code 0.5 between 0 and 1 for black and red (Table 1) or between 0 and 1 for white and red (Table 2) is not in the middle in the sRGB space and there are secondary values instead of 0. If the CIELAB colour data are used for the calculations then only the olv* and cmy* colour codes show the intended values.

In Table 1 the standard TV colours are modified to produce colours of equal blackness 0, 25, 50, and 75% (n*=0, 0.25, 0.50 and 0.75)

In Table 2 the standard TV colours are modified to produce colours of equal whiteness 0, 25, 50, and 75% (w*=0, 0.25, 0.50 and 0.75)

The different colour codes are important for Linearization Method.

Colour Codes for Linearization Method Remarks for use and reproduction  PostScript format
File type A.TXT or A.PS
PostScript and Portable Document Format (Version 3.0)
File type P.PS or P.PDF
TV standard colours for blackness 0, 25, 50 and 75%
(n*=0, 0.25, 0.50, 0.75)
For the study of CIELAB data and the calculated different colour codes

 L7510ENA(.TXT / .PS)
153 kByte

L7510ENP(.PS / .PDF )
153 / 71 kByte

Table 1: The standard TV colours are modified to produce colours of equal blackness 0, 25, 50, and 75% (n*=0, 0.25, 0.50 and 0.75)

 

Colour Codes for Linearization Method Remarks for use and reproduction  PostScript format
File type A.TXT or A.PS
PostScript and Portable Document Format (Version 3.0)
File type P.PS or P.PDF
TV standard colours for whiteness 0, 25, 50 and 75%
(w*=0, 0.25, 0.50, 0.75)
For the study of CIELAB data and the calculated different colour codes

 L7520ENA(.TXT / .PS)
153 kByte

L7520ENP(.PS / .PDF )
153 / 71 kByte

Table 2: The standard TV colours are modified to produce colours of equal whiteness 0, 25, 50, and 75% (w*=0, 0.25, 0.50 and 0.75)

Remark: Many other colour codes are given by the series 7XY0 (X=1 to 4, Y=1 to 9: all combinations!). See for example:

www.ps.bam.de/INFVM03/7110/A4Q7110E.PDF
or
www.ps.bam.de/INFVM03/7490/A4Q7490E.PDF

One can navigate from page to page forwards and backwards, or from page to figure and vice versa, or from figure to figure forwards and backwards. One can start navigation at any point. Many figure descriptions are realized in German (G), English (E), and Spanish (S).

For any Question contact
http://www.ni.din.de
or
http://o2.ps.bam.de

The ISO/IEC-test charts according to ISO/IEC 15775 and DIS ISO/IEC 19839-1 to -4 with english text: IE13
The ISO/IEC-test charts according to ISO/IEC 15775 and DIS ISO/IEC 19839-1 to -4 with german text: IG13
The DIN-test charts according to DIN 33866-1 to -5 with german text: DG13
The DIN-test charts according to DIN 33866-1 to -5 with english text: DE13

Digital Asian ISO/IEC-test charts with english text: http://www.jbma.or.jp/~isoiec/sc28/testchart/index.htm

change to DE (information about DIN 33866-1 to 5: 2000-07 in english)
change to DG (information about DIN 33866-1 to 5: 2000-07 in german)
change to IE (information about ISO/IEC 15775: 1999-12 and DIS ISO/IEC 19839-1 to 4: 2000-04 in english)
change to IG (information about ISO/IEC 15575: 1999-12 ans DIS ISO/IEC 19839-1 to 4: 2000-04 in german)

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