230201 1L2L0X0A_(I), http://farbe.li.tu-berlin.de/AEYI.HTM or http://color.li.tu-berlin.de/AEYI.HTM
For this main page with general information and special images
of the corresponding image page with 10 colour series, see AEYI in English, AGYI in German.
For the previous main page, see AEXI in English, AGXI in German.
For the next main page, see AEZI in English, AGZI in German.
For links to the chapter A Colour Image Technology and Colour Management (2019), see
Content list of chapter A: AEA_I in English or AGA_I in German.
Summary of chapter A: AEA_S in English or AGA_S in German.
Example image part of 26 parts AEAS to AEZS: AEAS in English or AGAS in German.
Chapter A: Colour Image Technology and Colour Management (2019), Main part AEYI1. Introduction and goals.
2. Numbering and order of files and figures
Figure 1 shows an A4 page with 16 numbered figures at 16 standard positions.
For the download of this figure in the VG-PDF format, see AEY0L0N1.PDF.
The first for characters, for example AEY0, include the web part page A, the language (G=german, E=english), the image page (A, B, C, ...,Z), and the figure part page (0, 1, ..., 9). Figure 1 shows the figure coding on the left page (0-1, 0-2, ..., 0-8), and on the right page (1-1, 1-2, ..., 1-8). A figure can consist of multiple pages (N or A).
The extension describes the figure format. Vector-graphic files are described with capital characters in the formats PS, PDF, TXT, JPG, and TIF. Pixel-graphic files use small characters for the formats eps, pdf, txt, jpg, and tif.
2. Input-output relation between CIE lightness L* and 8bit rgb data for slide film (sf) and negative film (nf)
Figure 2 shows an A4 page with 16 numbered figures at 16 standard positions.
For the download of this figure in the VG-PDF format, see AEY1L0N1.PDF.
The input-output relation between CIE lightness L* and 8bit rgb data for slide film (sf) and negative film (nf) is shown between under to over exposure.
3. Device and elementary hue circles, and location in hue circles of LMS cones, and chromatic and chroma data
Figure 3 shows device and elementary hue circles, and hue location of LMS cones (left), and antagonistic and opponent chromatic and chroma data (right).
For the download of this figure in the VG-PDF format, see AEY2L0N1.PDF.
The location of the cone sensitivities LMS is very different compared to the location of the "sensitivities" RGB which are for example used for scanners and cameras. The reason is up to now mostly unknown.
4. Four device systems ORS18a, TLS00a, FRS06a, TLS18a, and CIE elementary hue data in CIELAB diagram (a*, b*)
Figure 4 shows four device systems ORS18a, TLS00a, FRS06a, TLS18a, and CIE elementary hue data in the CIELAB diagram (a*, b*).
For the download of this figure in the VG-PDF format, see AEY3L0N1.PDF.
The chroma of the four device sytems is very different. The full names of the device systems are given in the figure. For Blue Bd the two Television Luminous Systems TLS00a and TLS18a have a chroma by a factor 2 larger compared to the Offset Reflective System ORS18a.
Figure 5 shows four device systems TLS27a, TLS38a, TLS52a, TLS70a, and CIE elementary hue data in the CIELAB diagram (a*, b*).
For the download of this figure in the VG-PDF format, see AEY5L0N1.PDF.
The area of the chroma hexagon decreases with the reflection of the ambient light on the screen surface. The last case may happen with a projector. The luminance by the projector and by ambient daylight is then approximately equal on the sceen surface.
In this case and for the intended equally spaced output of a 16 step gray scale according to ISO 9241-306:2018, the output gamma shall be changed from ga = 2,4 for TLS00a to ga = 1,2 for TLS70a. The relative gamma of ISO 9241-306 is then changed from gP = 1,0 to gP = 0,5. This corresponds to the two ISO-contrast steps CYP8 and CYP1.
5. Colours of eigth standard device systems (three datasets) with CIELAB and rgb data as table
Figure 6 shows colours of the eigth standard device systems ORS18a to TLS70a with CIELAB and rgb data as table.
The tables for the eigth standard device systems are on the pages 3 to 12.
For the download of only this figure in the VG-PDF format, see AEY6L0N1.PDF.
For the download of this figure and the tables in the VG-PDF format on 12 pages, see AEY6L0NA.PDF.
The four tables on the pages 3 to 6 for the four device systems ORS18a, TLS00a, FRS06a, and TLS18 are used in figure 4, see AEY3L0N1.PDF.
For the download of the figure and the tables for the eigth Televison Luminous Systems TLS00a to TLS70a in the VG-PDF format on 12 pages, see AEY7L0NA.PDF.
For the download of the figure and the tables for the eigth Offset Luminous Systems OLS00a to OLS70a in the VG-PDF format on 12 pages, see AEY8L0NA.PDF.
6. Input-output relations and user steering of the output on rgb displays and in cmyk print
Figure 7 shows Input-output relations and user steering of the output on rgb displays and in cmyk print.
For the download of this figure in the VG-PDF format, see AEY90-3N.PDF.
Professional printers are often called proof printers. For example for the standard offset printing users can steer the output with cmyk data. Proof printers show the expected offset output with cmyk data in advance.
Similar users can steer the output on all PostScript-printers by cmyk data. Therefore users can apply output linearization with 100% Under Colour Removal (UCR). In this case, for example the gray samples are only printed by the black colorant. This is the ergonomic output according to ISO 9241-306. This reduces the printing costs compared to the case, if achromatic colours are printed by a mixture of chromatic and achromatic printing colours. In addition the important achromatic stability of the output increases.
The so called RGB-printers in the consumer area do not allow to steer the output with cymk data. The change from rgb to cmyk data is under full control of the manufacturers. Therefore users can not produce an ergonomic output by output linearization with 100% UCR.
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.
Back to the main page of this TUB web site (NOT archive), see index.html in English, indexDE.html in German.