Océ Color Image Logic
Océ Color Image Logic consistently turns imperfect originals into perfect copies (reproduction of text, photos and fine drawings) in colour the first time and scans without the need for any user interference. This saves a lot of time since the process of copying and scanning is a very time-consuming task.
Advantages
- Time-saving and cost-saving
Scan or copy more in less time and therefore cost - Excellent quality scans and copies in colour
- Crystal-clear reproduction of "photos in text"
through automatic, separate detection of text and photo (including dithering) - Optimal reproduction of "mixed" originals (containing text, photos, drawings)
through separate optimisation of all pixels (pixel by pixel) - Brilliant reproduction of fine/thin lines (drawings)
through automatic recognition and optimisation of fine lines (1 pixel) - Creation of "stainless" scans/copies
through automatic background compensation - Sharp reproduction of photos
by avoiding the "moiré effect" through automatic dithering
- Little usage of memory
through very high compression of bitmaps - Increase operator productivity
Scan or copy without user interference. - Reduce wasted media
Better output quality first-time around
How the technology works
The Océ Color Image Logic system consists of the following components:
-
Scanning
The original is fed into the scanner and scanned line by line. Each pixel is converted on a scale of 0 to 255 for red, for green and for blue. this generates a 24-bit RGB image (256 levels per colour required 8 bits per colour). From here Océ Image Logic takes over. - Converting
When a black & white copy is required, the colour module converts 24 bit RGB data into a grey scale between 0 – 255. This is to ensure that even the lightest colours’ (e.g. yellow) are made visible with grey scales. - Automatic background compensation
At this stage the background is eliminated. Essentially this is done by raising the pixel values on the basis of the background level detected. In each line of the pixels, all background levels are set to the same level of RGB. As the background level is adjusted continuously over the whole page, this results in a background-free image. - Filtering segmentation
The background-free image is now optimised by advanced filtering to enhance weak information, keep small details open and digitally smoothen and soften shaded areas. - Colour management module
In this module the RBG values are converted to CMYK values that serve as input for printing. this is done in two stages:
- The RGB values are converted to lab values using the scanner profile. Lab is an indepenedent colour standard.
- The lab values are converted to values between 0 and 255 for cyan, magenta, yellow and black. this conversion results in 4 x 8 bits of CMYK data per pixel and takes into account the Océ media profiles for the Océ TCS500.
- Halftoning
This process converts the CMYK images (256 levels per pixel per colour) into bitmaps (1 bit per pixel) using the error diffusion technique. In short, the randomly arranged pixels create a visual impression of smooth shades of colour, while at the same time ensuring that (weak) lines, solids and text characters are sharply delineated and filled. The optimised image is now ready for printing.