Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Getting the accurate hue - Well-defined colour reproduction from the scanning to the output on screens and printers

11.12.2007
Red remains red and grey remains grey, regardless of whether it is a paper printout or a screen output.

However, in reality it is often completely different: red becomes magenta or grey changes to yellow-grey. A properly defined colour reproduction may be often important for holiday pictures and photographs, it is however of special importance for the evidential value of documents.

In order to provide a remedy, DIN (German Institute for Standardization) and BAM together with users have developed the DIN 33866-1 to 6:2000 standard series for colour copiers, colour printers, colour scanners and colour screens. This has now been integrated into the international ISO/IEC standard documents.

A further development in this field is the draft of a new standard series DIN E 33872 Part 1 to Part 6 regarding relative colour reproduction, published this November. Parts 2 to 6 contain five test charts in pdf format which can be downloaded from the internet at http://www.ps.bam.de/33872E.

The output of four equivalent grey series can be tested using the test charts in Part 3 of the draft standard. The printout of a series of four grey tones defined by four corresponding definitions in the PostScript programme language, is supposed to produce four equal and visually equally spaced grey series. However, four unequal, differently spaced and sometimes chromatic grey series are often seen on many screens and in the printout of the grey test charts.

This is because modern connection sequences from scanning to reproduction reduce or enhance the colour steps and often let them distinguish completely. The test charts enable a visual assessment of the properties of the output devices printer and screen. Optional a colorimetric specification is also possible.

The questions about the visual output properties are on the last page of the test charts. Most users do not find it difficult to answer the questions. If the user is not satisfied, he can choose appropriate software for his operating system (Windows, Mac, Unix) which displays the four grey series of the pdf test files equal and equally spaced on the monitor or even print them on a black-and-white or colour printer. This is a great help for the user of the workstation as both screen and printer can be adjusted to produce the intended evidential output.

Information:
Prof. Dr. Klaus Richter
Division VIII.1 Measurement and Testing Technology; Sensors
Phone: +49 30 8104-1919
Email: klaus.richter@bam.de or klaus.richter@mac.com

Dr. Ulrike Rockland | idw
Further information:
http://www.bam.de
http://www.ps.bam.de/33872E

More articles from Materials Sciences:

nachricht ADIR Project: Lasers Recover Valuable Materials
21.07.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht High-tech sensing illuminates concrete stress testing
20.07.2017 | University of Leeds

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

Im Focus: Laser-cooled ions contribute to better understanding of friction

Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision

Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

NASA looks to solar eclipse to help understand Earth's energy system

21.07.2017 | Earth Sciences

Stanford researchers develop a new type of soft, growing robot

21.07.2017 | Power and Electrical Engineering

Vortex photons from electrons in circular motion

21.07.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>