230201 1L2L0X0B_(I), http://farbe.li.tu-berlin.de/BEQI.HTM or http://color.li.tu-berlin.de/BEQI.HTM

For this main page with general information and special images
of the corresponding image page with 10 colour series, see BEQI in English, BGQI in German.
For the previous main page, see BEPI in English, BGPI in German.
For the next main page, see BERI in English, BGRI in German.

For links to the chapter B Colour Vision and Colorimetry (2020), see
Content list of chapter B: BEA_I in English or BGA_I in German.
Summary of chapter B: BEA_S in English or BGA_S in German.
Example image part of 26 parts BEAS to BEZS: BEAS in English or BGAS in German.

Chapter B: Colour Vision and Colorimetry (2020), Main part BEQI

1. Introduction and Goals
This part shows colorimetric properties for the CIE-10-degree observer and antagonistic reflection.

Figure 1: Output in format A6 of the file BEQ5L0NP.PDF, see
BEQ5L0N1. PS / TXT / PDF / jpg

BEQ5: 6 Ostwald-optimal colours
for 8 illuminants Dxx, CIE-10-degree observer, chromatic value
diagram (CAB2, Y), and for the normalized Yan-scale -1 <= Yan <= 1, and C>=288:1.

Figure 2: Ostwald-optimal colours in the chromatic value
diagram (CAB2, Y) for the color pair Y-B, and for the normalized Yan-scale -1 <= Yan <= 1, and for the contrast step C>=288 in red.

The table and the figure include important CIE data
for the three colour pairs R-C, Y-B, and G-M
, and for the CIE standard illuminant D65.
For the download of this figure in the VG-PDF format, see BEQ50-1A.PDF.


Figure 3: Ostwald-optimal colours in the chromatic value
diagram (CAB2, Y) for the color pair R-C, and for the normalized Yan-scale -1 <= Yan <= 1, and for the contrast step C>=288 in red.

The table and the figure include important CIE data
for the three colour pairs R-C, Y-B, and G-M
, and for the CIE standard illuminant D65.
For the download of this figure in the VG-PDF format, see BEQ51-1A.PDF.

Figure 4: Output in format A6 of the file BEQ9L0NP.PDF, see
BEQ9L0N1. PS / TXT / PDF / jpg

BEQ9: 6 Ostwald optimal colours
for 8 illuminants Dxx, CIE-10-degree observer, chromatic value
diagram (CAB,2, Y), and for the normalized Yan-scale -1 <= Yan <= 1, and C=2:1.

Figure 5 shows similar data compared to Figure 2 (in dashed red),
now for the lowest contrast step C=2:1 in green.

For the download of this figure in the VG-PDF format, see BEQ90-1A.PDF.


Figure 6 shows similar data compared to Figure 3 (in dashed red),
now for the lowest contrast step C=2:1 in green.

For the download of this figure in the VG-PDF format, see BEQ91-1A.PDF.

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For the archive information (2000-2009) of the BAM server "www.ps.bam.de" (2000-2018)
about colour test charts, colorimetric calculations, standards, and publications, see
indexAE.html in English, indexAG.html in German.

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