230201 1L2L0X0A_(I), http://farbe.li.tu-berlin.de/AEEI.HTM or http://color.li.tu-berlin.de/AEEI.HTM
For this main page with general information and special images
of the corresponding image page with 10 colour series, see AEEI in English, AGEI in German.
For the previous main page, see AEDI in English, AGDI in German.
For the next main page, see AEFI in English, AGFI 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 AEEI1. Introduction and goals.
3. Contrast change of test chart ISO-AE18 and ISO-AE28 in the PG-PDF format in 15 steps.
The display contrast changes with the reflection of the environmental light on the display. One can study the visual changes on the achromatic ISO-test chart AE18, and the chromatic ISO-test chart AE28.
Figure 3 shows the ISO-test chart AE18 for 5 of 15 ISO-contrast steps.
For the download of this figure in the VG-PDF format, see AEE2L0N1.PDF.
Visual results show, that the best output of AE18 with 16 approximately equidistant grey steps produces also 16 equidistant chromatic steps, for example from white to device red Rd or green Gd or blue Bd. However, for the visibility of the element Landolt-ring a little lower contrast step seems to be often better, for example for CYP3 instead of CYP5 in the standard office.
Figure 4 shows the ISO-test chart AE28 for 5 of 15 ISO-contrast steps.
For the download of this figure in the VG-PDF format, see AEE4L0N1.PDF.
With many output questions on 24 pages the ISO-test charts AE18 and AE28 can be downloaded. The ISO-test charts are similar to figure 5 and 6 for the contrast step CYP8.
AE18: For the 8 ISO-contrast steps CYP1=CYN15 to CYP8=CYN8 on 24 pages, see (2,2 MB)
AE18: For the 8 ISO-contrast steps CYN8=CYP8 to CYN1=CYP15 on 24 pages, see (2,2 MB)
AE28: For the 8 ISO-contrast steps CYP1=CYN15 to CYP8=CYN8 on 24 pages, see (2,4 MB)
AE28: For the 8 ISO-contrast steps CYN8=CYP8 to CYN1=CYP15 on 24 pages, see (2,4 MB)
4. Properties of the ISO/IEC-image "flour motif" in the PG-PDF format for four resolutions.
The ISO-test charts AE18 and AE28 in figure 3 and 4 include the ISO/IEC image "flower motif" in two versions based on slide film (sf, AE18) and negative film (nf, AE28). The analog reflective original "flower motif"(about 70cm x 100cm) includes a black and white Siemens-star and test patches.
An equally spaced 16 step grey scale with CIE lightness L* in the range L*=15, 20, 25, ..., 90, 95 was used. The 14 CIE-test colours for colour rendering according to CIE 13.3 include a hue circle and the four elementary colours Red Re, Yellow Ye, Green Ge, and Blue Be (no. 9 to 12) with a high chroma. The taking illuminant was standard illuminant D65. As measuring and taking (viewing) geometry the CIE standard 45/0 degree was used.
Seven different exposures between under to over exposure were used. For the slide film the exposures -1,5, -1,0, -0,5, +0,0, +0,5, +1,0, and +1,5 stops were used. For the negative film the exposures -2,0, -1,0, +0,0, +1,0, +2,0, +3,0, and +4,0 stops were used. The standard Kodak Photo CD process creates the rgb-colour data as function of exposure and for the two film materials.
Figure 5 shows the input - output relationship for slide film sf (left) and Negativfilm nf (right).
For the download of this figure in the VG-PDF format, see AEY1L0N1.PDF.
Figure 6 shows the input - output relationship for slide film sf with the exposure +0,5.
For the download of this figure in the VG-PDF format, see AEY10-6N.JPG.
Figure 7 shows the input - output relationship for negative film nf with the exposure +1,0.
For the download of this figure in the VG-PDF format, see AEY11-5N.PDF.
By output linearization of the standard rgb values of the Photo CD the intended ergonomic relationship was reached, see the dashed black line. The three relations for the rgb data are nearly perfect, and are therefore located under or near the dashed line. Fore more information about output linearization see the Reportership Report CIE R8-09 (only download for CIE members) or a paper of Richter with approximately the same technical content, see
Figure 8 shows the flower motif for slide film with the exposure +0,5.
For the download of this figure in the VG-PDF format, see AEE61-3N.PDF.
Figure 9 shows the flower motif for negative film with the exposure +1,0.
For the download of this figure in the VG-PDF format, see AEE71-3N.PDF.
Visual inspection lead to the result that it is hard to see differences between the film material slide film (sf) and negative film (nf). This is similar for exposure variations of slide film in the range between -0,5 and +1,5 stops, and of negative film in the range between -1,0 and +3,0 stops.
The exposure range is about four stops for negative film and two stops (half) for slide film. The output linearization method produces in this exposure ranges images which appear approximately identical.
For other resolutions and in addition images with cmyk instead of rgb data go to the image part AEES.
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.