181212 and 030101: A/IE13/IE13.HTM
For this page, see
IE13 in English or
IG13 in German.
For the previous page, see
IE12 in English or
IG12 in German.
For the next page, see
IE80 in English or
IG80 in German.
Back to the main page of this colour series, see
../IE in English or
../IG in German.
"Specifying image reproduction of colour devices with digital
and analog test charts"
No. 1: achromatic with large
lightness contrast of photography
No. 2: chromatic with CMY-colours and flower motif
No. 3: achromatic with medium lightness contrast of offset
printing
No. 4: chromatic with OLV-(RGB-)colours and test colour
motif
| Digital ISO/IEC-test chart: | Remarks and image reproduction | PostScript-Format Filetype TXT or EPS |
Portable Document Format PDF (Reader 4.0, 3.0 and 2.1) |
| No. 1: achromatic with large lightness contrast of photography | text mode (T) (achromatic colour is produced only by colour black N) |
E1-1TD22.PDF |
|
| colour mode (C) (achromatic colour is produced by black N and e. g. CMY ) |
E1-1CD22.PDF |
||
| No. 2: chromatic with CMY-colours and flower motif | colour mode (C) 192 x 128 pixel in image |
E1-2CD22.PDF |
|
| colour mode (C) 384 x 256 pixel in image |
E2-2CD22.PDF |
||
| colour mode (C) 768 x 512 pixel in image |
E3-2CD22.PDF |
||
| No. 3: achromatic with medium lightness contrast of offset printing | text mode (T) (achromatic colour is produced only by colour black N) |
E1-3TD22.PDF |
|
| colour mode (C) (achromatic colour is produced by colour black N and e. g. CMY) |
E1-3CD22.PDF |
||
| No. 4: chromatic with OLV-(RGB-) colours and test colour motif | colour mode (C) 192 x 128 pixel in image |
E1-4CD22.PDF |
|
| colour mode (C) 384 x 256 pixel in image |
E2-4CD22.PDF |
||
| colour mode (C) 768 x 512 pixel in image |
E3-4CD22.PDF |
With EPS-files the best reproduction in colour and resolution is reached. One can use on the Windows-platform "copy" and on the Macintosh-platform "download" to print the EPS-file by a PostScript-printer.The EPS-file can be viewed directly on a colour monitor by a display-Postscript system (e. g. Nextstep, Openstep on Windows, Yap on Macintosh OS X server).
One can use the PDF-file to view the digital ISO/IEC-test charts on any monitor and to print on any colour or black and white printer (not only PS-printers) by Adobe Acrobat Reader (or Exchange) Version 4.0, 3.0 or 2.1.
Output optimization of the achromatic ISO/IEC-test chart no. 3
If the start printer output of the ISO/IEC-test chart fails to pass some of the ISO/IEC-tests according to ISO/IEC 15775, e. g. to recognize the 16 grey steps or all the Landolt -rings, then there is the intention for an optimized printer output. The following Table 2 shows examples for the specification of the reproduction properties of the start output and the optimized output according to the method given in Annex G of DIN 33866-1:2000-08 and ISO/IEC 15775:1999-12.
| Specification according to Annex G of DIN 33866-1 or ISO/IEC 15775 | Device
A Black and white printer; Output files A9120ENP.PDF and A9120EFP.PDF |
Device
F Foto colour printer; Output files F9120ENP.PDF and F9120EFP.PDF |
Device
O Laser colour printer; Output files O9120ENP.PDF and O9120EFP.PDF |
Device
T Laser colour printer; Output files T9120ENP.PDF and T9120EFP.PDF |
| Mean lightness difference (16 colours), Start output NP.PDF and optimized output FP.PDF | 1.9 for start
output 0.7 for optimized output |
2.5 for start
output 0.4 for optimized output |
4.8 for start
output 0.7 for optimized output |
5.4 for start
output 0.8 for optimized output |
| Regularity (5 colours), Start output NP.PDF and optimized output FP.PDF | 77.1 for start
output 90.2 for optimized output |
67.0 for start
output 92.0 for optimized output |
33.7 for start
output 94.1 for optimized output |
49.3 for start
output 89.9 for optimized output |
In Table 2 four different printers using the PostScript operator: 0 0 0 n* setcmykcolor (series www.ps.bam.de/DE09/9120n/n9120EFP.PDF, n=A,F,O,T) are shown. The files with the extention NP.PDF (N=no colour management) and FP.PDF (F=File colour management) distinguish only by a few lines at the beginning, which includes the colour management data (which optimizes the colour output). The file FP.PDF includes the measured the CIE lightness data L* of the start output by the file NP.PDF.
Important exercise in four steps which is recommended for a user who likes to
optimize visually the output of his device which may be a
printer, monitor or a Video-beamer:
1. The PS file T9120EFP.PS is
copied to T9120ECP.PS (instead of F=File the abreviation
C=Changed is used)
2. The PS file T9120ECP.PS includes in line 81 and 82 the
measured lightness data L* of the 16 grey steps of the
output of the file T9120ENP.PS.
The 16 measurement data are as follows:
12.80 13.24 13.63 19.19 26.83 34.12
40.27 44.95
50.75 55.23 60.02 70.35 76.19 83.60 88.87 96.39
It is recommended to change the
16 data to the 16 default relative values in equidistant steps
with a step difference of 6.67:
00.00 06.67 13.33 20.00 26.67 33.33
40.00 46.67
53.33 60.00 66.67 73.33 80.00 86.67 93.33 100.0
This gives the final PS file T9120ECP.PS (we have changed additionally the name FP.PS
to CP.PS in the file)
3. Produce an output of the three PS files NP.PS, FP.PS and CP.PS on a PS printer or Display PostScript system (or use e. g. Adobe Acrobat Distiller and produce und use PDF files for output)
4. The output comparison of the three
PS files (or three PDF-files) shows that visually the 16 grey
steps and Landolt-rings in T9120ENP.PS
and T9120ECP.PS are identical.
The file T9120EFP.PS gives a lighter output (the start output
was too dark). The output comparison of the three PDF files T9120ENP.PDF, T9120ECP.PDF
and T9120EFP.PDF shows the same properties.
Result: Only the change of two lines with the relative CIELAB lightness data L* from equidistant relative values to measuered values allow to optimize the output of the achromatic ISO/IEC-test chart.
Recommended application for a user
device (e. g. a printer, a monitor
or a Video-beamer):
1. If the output seems too light for light colours then
guess and change mainly the lighter values, e. g.
guess and use 90 and 72 instead of the default values 80 and 60.
00.00 06.67 13.33 20.00 26.67 33.33
40.00 50.66
61.33 72.00 78.00 84.00 90.00 93.33 96.66 100.0
This is realized in the files T9120ECPN.PS and T9120ECPN.PDF
which produce a darker (N) output for light colours
only. The dark colours remain unchanged.
2.If the output seems too dark
for dark colours then guess and change mainly the darker
values, e. g. guess and use 10 and 28 instead of the default
values 20 and 40.
00.00 03.33 06.67 10.00 16.00 22.00
28.00 38.66
49.33 60.00 66.67 73.33 80.00 86.67 93.33 100.0
This is realized in the files T9120ECPW.PS and T9120ECPW.PDF
which produce a lighter (W) output for dark colours
only. The light colours remain unchanged.
An optimized output often depends on more acurate input data. They are produced by colour measurement of the grey steps in the start output or by visual comparison with the grey steps of a reference, e. g. the DIN-test chart no. 1 according to DIN 33866-1 or the ISO/IEC-test chart no. 1 according to ISO/IEC 15775.
Remark 1: Output optimization for images
with 32 ISO/IEC-test colours is under development (result expected
in April 2001)
Remark 2: Output optimization for chromatic ISO/IEC-test charts
no. 2 and no. 4 is under development (result expected in May 2001)
Remark 3: The 16 above lightness data may be stored in the Distiller
Startup (S) directory. A PS file can be produced by nearly
any application. If a user produces from this PS file a PDF file
then the Distiller may take the lightness data from the Distiller
Startup (S) directory to produce the intended correction.
Remark 4: If the 16 above lightness data are stored in the PostScript
Device (D) memory, then the output of all PS files of any
application may produce the intended correction.
Further discussion, examples and ideas for different printers with english text, see: DE09
The ISO/IEC-test charts with german
text: IG13
The DIN-test charts with german text: DG13
The DIN-test charts with english text: DE13
DE801: 030215: Figures and ISO/IEC-test charts for different input and different output PS operators
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 german)
change to IG (information about ISO/IEC
15575: 1999-12 ans DIS ISO/IEC 19839-1 to 4: 2000-04 in english)
-------
For an introduction (archive 2000-2009) to all folders
compared to this folder IE13, see
../IE.HTM in English or
../IG.HTM in German.
For information (archive 2000-2009) about International and
National Standards, Technical Reports, and Meetings, see
../4STAE.html in English or
../4STAG.html in German.
For information (archive 2000-2009) about colour test charts
and colorimetric calculations, see
../indexAE.html in English or
../indexAG.html in German.
For publications (archive 2000-2009) of the BAM research group, see
../XY91AE.html in English or
../XY91AG.html in German.
Back to the main page of the TU web site
(not archive), see
../../index.html in English or
../../indexDE.html in German.
The last link may not work, if you have visited
directly this archive site.
Then go to the main page of one of the
two TU web sites in a new window, see
http://farbe.li.tu-berlin.de/index.html or
http://130.149.60.45/~farbmetrik/index.html.