Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1981-09-28
1983-12-06
Masinick, Michael A.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, H04N 140
Patent
active
044196911
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns a method for the improved image reproduction in reproduction technology, in particular in form manufacture.
2. Description of the Prior Art
For the obtaining of the color separations for multicolor printing, besides the classical method by means of cameras for copying work, to an increasing degree electronic devices are being used for the production of color separations, so-called scanners are used which undertake the color correction and the raster breakdown of the images or, respectively, of entire pages, which is necessary for the printing. Very often in such images or pages there are line drawings like scripts, edge cross pieces, signets, separation signs, frames etc. If one were simply to put such line drawing elements into the raster together with the half-tone images, then by means of the rastering at specific contours, a step-like distortion of the smooth line contours in the original would arise which in the printed reproduction has an unacceptably disturbing effect. Today customarily one obtains the color separations in such a manner than one only rasters the half-tone images in electronic devices or cameras. These half-tone separations are then mounted together with a film which carries the unrastered line drawing. From this mounting, on a third film, an intermediate negative is produced. This is again copied and provides a color separation which now bears the combination of rastered half-tone images and unrastered line drawings and is utilized for the production of forms. One is thus compelled to use this method which is expensive in terms of material and time, which in addition because of the many copying processes brings with it still a significant uncertainty in the total method if one wants to preserve the smooth contours of the line drawing in the rastered half-tone images all the way to the form.
One could indeed improve the line reproduction in the electronic devices in that one scans and records items of information, half-tone and line images, with multiple line fineness, for example, 2 to 3 times. However, in the case of the pre-given writing velocity, the processing time would rise proportionally with the refinement, which is also not acceptable for the practical operation. Besides this, in the case of the storage of entire images, an increased storage requirement arises.
SUMMARY OF THE INVENTION
The present invention is based upon the problem of avoiding the indicated disadvantages and of stating a method which operates with improved image reproduction in the case of the production of forms and particular in printing technology or textile printing technology.
In an electronic device for the production of color separations, according to the invention, simultaneously with scanning of the half tone images from a particular original or in the case of outputting from an electronic image memory, the line drawing information is scanned and specifically with the same line fineness as the half tone image. The scanning values of the line information are however according to the invention fed to a circuit which stores the contents of several neighbouring scanning lines and in each scanning point, by means of comparison with the surroundings of the point, obtains refined intermediate values.
A possibility of the obtaining of intermediate values is described for example in U.S. Pat. No. 4,075,663 which is hereby incorporated by reference.
These values are fed to a recording element which has several selectively drivable recording beams. To such a recording element (for example described in German Pat. No. 2,107,738 which corresponds to U.S. Pat. No. 3,725,574), which is customarily used for half tone recording for the depiction of different sized and differently shaped raster points, by means of the invention the improved line information is supplied in such a manner that it is blended into the rastered half tone information. The line fineness of the line information may thereby nevertheless be coarser than the resol
REFERENCES:
patent: 3849592 (1974-11-01), Rosenheck
patent: 3922484 (1975-11-01), Keller
patent: 4075663 (1978-02-01), Wellendorf
patent: 4084196 (1978-04-01), Tisue et al.
patent: 4124870 (1978-11-01), Schatz et al.
patent: 4150400 (1979-04-01), Wong
Sing Gerhard
Wellendorf Klaus
Dr. -Ing. Rudolf Hell GmbH
Masinick Michael A.
LandOfFree
Method for the improved reproduction of image in reproduction te does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the improved reproduction of image in reproduction te, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the improved reproduction of image in reproduction te will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2032390