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Acquisition, Compression and Reproduction of True-Colour Image Documents

Objective

The four main objectives of this project were to:
-develop highly sophisticated colour image acquisition, processing and enhancement systems
-define and develop colour image coding and compression algorithms, using techniques which took into account human perceptual characteristics
-develop an advanced non-impact printing technique for colour images with fine tone definition
-test different non-impact printing techniques for the rendition of true colour (the results showed the ink-jet technique be too slow, leading to the adoption of the thermal transfer technique for the final demonstrator).
The objectives of this project were to:
develop highly sophisticated colour image acquisition, processing and enhancement systems;
define and develop colour image coding and compression algorithms, using techniques which took into account human perceptual characteristics;
develop an advanced nonimpact printing technique for colour images with fine tone definition;
test different nonimpact printing techniques for the rendition of true colour.

An integrated prototype was developed to demonstrate the result of the research, incorporating algorithms for:
colour transformation rules from red, green and blue (RGB) to cyan, magenta and yellow;
error diffusion intensity modulation techniques (the transformation and diffusion algorithms first developed for ink jet printers were adapted for wax thermal transfer printers);
compression ratios from 10 to 20 on RGB true colour images with a size of 512 by 512 pixels.

Studies and experiments were carried out on colour image acquisition and enhancement and a general software architecture, giving maximum flexibility, was defined and implemented.

All the programmes are embedded in the CIPLY package, which is a very general image processing package. The identifiable product is the CIPLY software package, which could be used for image processing. Other packages exist on the market, but CIPLY has more flexibility, making it easier to build an application.
An integrated prototype was developed to demonstrate the result of the research, incorporating algorithms for:
-colour transformation rules from red, green and blue to cyan, magenta and yellow
-error diffusion intensity modulation techniques (the transformation and diffusion algorithms first developed for ink-jet printers were adapted for wax thermal transfer printers)
-compression ratios from 10 to 20 on RGB true-colour images with a size of 512 by 512 pixels.
Studies and experiments were carried out on colour image acquisition and enhancement and a general software architecture, giving maximum flexibility, was defined and implemented.
All the programmes are embedded in the CIPLY package, which is a very general image-processing package. The identifiable product is the CIPLY software package, which could be used for image processing. Other packages exist on the market, but CIPLY has more flexibility, making it easier to build an application.
Exploitation
The TRUE-COLOUR project has promoted the use of colour documents in the office environment by developing new and advanced methods for colour image reproduction, storage and transmission. The consortium will exploit the project results industrially during 1990 in electronic colour processing systems and colour image reproduction peripherals.

Coordinator

Ingegneria C. Olivetti and C. SpA
Address
Via Campi Flegrei 34
80078 Pozzuoli Napoli
Italy

Participants (2)

INTERSYS GRAPHIC
Belgium
Address
Avenue Lloyd Georges
1050 Brussels
KATHOLIEKE UNIVERSITEIT LEUVEN
Belgium
Address
De Croylaan
3030 Heverlee