050615: www.ps.bam.de/info05/index.html

BAM-DIN-Workshop on Image Technology (in english)
Radiological and Colorimetric Image Technology
Efficient Scanning and Output on Displays and Printers by ISO/IEC-, CEN- and DIN-test charts
Date: April 18 (13-21h) and April 19 (9-17.15h), 2005
Place: Federal Institute for Materials Research and Testing (BAM)
Unter den Eichen 87, D-12205 Berlin, Ludwig-Erhard-Saal

For the Program of the BAM-DIN-Workshop on Image Technology, see the URL (10 pages, 500 kByte)


For Reasons of this BAM-DIN-Workshop on Image Technology in PDF see the URL (4 pages, 250 kByte)

For the Registration form, see the URL (1 page, 30 kByte)

Time table of the program, titles and authors of papers and posters:

Date: April 18 (13-21h): Radiological Image Technology

13.00-15.00h Welcome and First paper session:
Welcome by Thomas Schmelzer (DE) and Prof. Dr. M. Hennecke, President of BAM

Selection of industrial displays for X-Ray images in non-destructive testing
Klaus Bavendiek, Yxlon International X-Ray GmbH, Hamburg

Requirements for Film Digitization and Printing in Radiographic Non-Destructive Testing (NDT)
Uwe Ewert, Uwe Zscherpel, BAM, Berlin

Monitor and software requirements for comparison of digital radiographs and catalogues
Uwe Zscherpel, O. Alekseychuk, U. Ewert, BAM Berlin

15.00-16.00h First Poster session:
Posters of many authors and many additional posters

16.00-17.30h Second Paper session:
Human perception of images
Kurt Osterloh, BAM Berlin, for the paper see the URL (PDF, 16 pages, 2.9 MByte)

Auto adaptive contrast optimization in medical imaging technologies
Thomas Turowski, Lasersoft Imaging AG, Kiel

3D-visualisation component utilizing the graphics adapter as co-processor for volume rendering
Franz Uhrmann, Oliver Scholz, Michael Bauer, Fraunhofer Institute, Fuerth

17.30-19.00h Second Poster session and Welcome Reception:
Posters of many authors and many additional posters
The Welcome Reception is supported by the following companies ...

19.00-20.00h Private (by car) and public transport to Technical University, Einsteinufer 19, 10587 Berlin, Building E

20.00-21.00h Colour and Colour Vision - Description of Experiments in the Science of Color
Guided tour through this Exhibition at Technical University of Berlin, Institute of Lighting Technology
A separate print (70 colour figures, 23 pages) will be available in english or german for every visitor

Date: April 19 (9-17h): Colorimetric Image Technology

9.00-10.30h Third Paper session:
Improved visual and material efficiency for output in image technology by colorimetric methods
Klaus Richter, BAM, Berlin (DE) for the paper see the URL (PDF, 20 pages,1.4 MByte)

Properties and application of ISO/IEC-test charts according to ISO/IEC 15775 and corresponding
DIN-test charts according to DIN 33866-1 to -5
Thomas Schmelzer, SWS Software Support, Goeppingen (DE)

Remanufacturing of toner cartridges - Present steps and Development of European CEN Standards
Peter Hortig, Embatex AG, Feldkirchen, Austria

10.30-11.30h Third Poster session:
Posters of many authors and many additional posters

11.30-13.00h 4th Paper session:
Colour Management Method (CMM) which maintains CIELAB hue and relative lightness and
chroma for analog and digital ISO/IEC-test charts
Hans Wagenknecht, BAM and LaserSoft Imaging AG, Kiel (DE), for the paper see the URL (PDF, 15 pages, 18 MByte)

Multispectral CIELAB camera for the evaluation of colored automobile coatings
Stefan Jaeger, BAM and Volkswagen AG, Wolfsburg (DE), for the paper see the URL (PDF, 18 pages, 2 MByte)

Wide Gamut LCD monitor for Softproof
Shoichi Yamaguchi, Armin Collong, EIZO NANAO CORPORATION (JP), for the paper see the URL (PDF, 13 pages, 9 MByte)

Testing the emission from printers by means of test chambers
Olaf Wilke, Oliver Jann, Jens Rockstroh, BAM, Berlin (DE), for the paper see the URL (PDF, 10 pages, 2 MByte)

13.00-14.00h Lunch time

14.00-15.30h 5th Paper session:
Colour Management and need for more standards to solve problems for device output and print
Olaf Druemmer, Callas Software, Berlin (DE), for the paper see the URL (PDF, 26 pages, 800 kByte)

Visual Performance of TFT-LCDs
Juergen Neumeier, Autronic-MELCHERS GmbH, Karlsruhe (DE)

Colour requirements for different display technologies in ISO standards
Stephan Scheuer, TÜV Rheinland Group, Koeln (DE)

15.30-16.15h 4th Poster session:
Posters of many authors and many additional posters

Production method for analog ISO/IEC-test charts according to ISO/IEC 15775
Jens Witt, BAM, Berlin (DE), for the paper see the URL (PDF, 13 pages, 2.7 MByte)

16.15-17.15h Plenary discussion: BAM-DIN-Workshop on Image Technology
Relationship between Radiological and Colorimetric Image Technology

Discussion leader: Thomas Schmelzer (DE)
Discussion members: all participants and experts
Ewert, Zscherpel, Bavendiek, Richter, Hortig, Turowski, Scheuer

Proposed participants
It is expected that many of the speakers and of the about 100 participants of the DIN-Workshop 2004 will be present, compare

Reasons for the BAM-DIN-Workshop on Image Technology
There is a need to inform and exchange ideas about the digital and analog test charts for both Radiological and Colorimetric Image Technology. Most of the material has been developed independently in different ISO, IEC and CIE standard committees for different needs but there is a large overlap.

Reasons for Radiological Image Technology

In Industrial Digital Radiology (DIR) film viewing on light boxes is replaced by the display of the digital images on computer monitors. The requirements for light boxes on film viewing are standardized in EN 12580, but there is not yet any comparable standard for monitor viewing in the field of Non-destructive Evaluation (NDE). The main aim of this workshop is to link and discuss other on-going activities on standard committees working in the field of Image Technology for office use or medicine.

Points for discussions and presentations of the state of art are as following:

- How to compare film images with displayed images generated by DIR?
- State of the art in high quality image displaying (grey scale images)
- Ways to compare reference images and flaw catalogues with digital radiographs of the inspected part
- Quality assurance for digital film printing and displaying on monitors
- Quality evaluation of film digitization based on test charts and reference radiographs
- Evaluation of image quality of monitor displays
- DICOM (Digital Imaging and Communication in Medicine) part 14: standardized Display Function for display of grey scale images
- The human visual perception system: recognition of poor contrast details on monitors
- Stereoscopic presentation of 3D objects

Reasons for Colorimetric Image Technology

In 2004 BAM VIII.34 was editor of the ISO/IEC Technical Report 19797:2004-09 for Output Linearization of colour devices in CIELAB. For the last public available version (Draft Technical Report DTR of 2004, 20 pages, 280 kByte) see


and for ISO/IEC-test charts according to ISO/IEC TR 19797:2004-09 see 19797TE

BAM VIII.34 is at present editor of the ISO/IEC Technical Report 24705:2005-XX (in publication stage) for colour reproduction properties of colour devices. This document has been agreed in 2004 by international vote and is under publication as ISO/IEC Technical Report. For the last public available version (DTR, 80 pages, 1.0 MByte) see


and for ISO/IEC-test charts according to ISO/IEC TR 24705:2005-XX see 24705TE

In 2005 a highlight of the BAM-DIN-Workshop will be new BAM CIELAB cameras which measure the spectral reflectance of every pixel and produce CIELAB data for CIE standard illuminant D65 and an other illuminant (D50).

In the figure the coordinate transfer from CIELAB data to device dependent colorimetric coordinates of Image Technology is shown. For linear relations between CIELAB and device dependent colorimetric coordinates see the URL (6 pages, 140 kByte)


Some coordinates and methods produce a three times higher material efficiency of toner and ink for printer output. Others produce improved visual efficiency for recognition on displays and data projectors.

Reasons for the final Plenary Discussion
There are a lot of links between Radiological and Colorimetric Image Technology. Many will be shown and discussed dduring the BAM-DIN-Workshop and the final Plenary Discussion.


Some examples of ISO/IEC-test charts
ISO/IEC-test charts according to ISO/IEC 15775:1999 are available in digital and analog form by different sources. The analog form printed with 3600 dpi has been produced first in 1999 based on a digital version in the file formats PostScript (PS) and Portable Document (PDF). This hardcopy was at first only used for the test of the color reproduction properties of colour copiers. For instance the Japan national standard JIS X 6933:2002 and the German standard DIN 33866-2:2000 use this test chart for the test of colour copiers and there are analog and digital version available.

Additionally the analog version was used for colour scanners, for example in DIN 33866-4, and the digital version was used for the output on monitors and printers, for example in DIN 33866-3 and -5:2000. In 2004 both the analog and digital version of this test charts are used in ISO/IEC TR 19797:2004-09 for device output linearization and in the ISO/IEC Technical Report 24705:2005-XX (under publication) for the test of the reproduction properties of printers, scanners, and monitors.

ISO/IEC-test chart according to ISO/IEC 15775:1999 and ISO/IEC TR 24705:2005-XX (under publication).

In format A4 this test chart shows eight pages for 8 different contrast ratios at the office work place. Each page output uses one contrast ratio between >500:1 and 2:1, see (150 / 150 / 1.600 kByte) for display output.

In 2004 the ISO/IEC-test chart has been modified and proposed by Germany for a new proposed standard ISO 9241-306 of ISO TC 159/WG4
"Ergonomics of human system interaction - Ergonomic requirements and measurement techniques for electronic visual displays - Part 6: Workplace assessment methods"

The application case is an office with daylight illumination. This room illumination may change the contrast ratio on the LCD display or the display of the data projector between white and black from 500:1 to 2:1. The last value give the present minimum luminance ratio requirement for white and black defined by ISO TC 159/WG4.

The modification of the above ISO/IEC-test charts produces 8 pages for 8 different luminance ratios between larger 500:1 and 2:1. At a given workplace the best recognition is given only for one of the 8 pages. In an ideal case the best recognition occurs if the luminance ratio on the page is equal to the measured luminance ratio.

The BAM-DIN-Workshop will allow to study the properties of this and many other analog and digital colour test charts.

There is no registration fee until April 1, 2005. For the registration form, see the URL

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