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 Title: |
EP0158902B1:
Monochromatic representation of color images[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
B1 PATENT SPECIFICATION i
(See also:
EP0158902A2,
EP0158902A3 )
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| Inventor: |
Haggerty, William T.;
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| Assignee: |
WANG LABORATORIES INC.
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| Published / Filed: |
1992-08-19
/ 1985-03-29
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| Application Number: |
EP1985000103814
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| IPC Code: |
Advanced:
G06F 3/153;
G06K 15/00;
G06K 15/02;
G09G 5/00;
G09G 5/02;
G09G 5/36;
H04N 1/40;
H04N 1/46;
H04N 1/60;
G09G 3/20;
Core:
more...
IPC-7:
G06K 15/00;
G09G 1/28;
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| ECLA Code: |
G06K15/02; G06K15/00; G09G5/02M; H04N1/40B; S09G3/20G8S; S06K215/00D8;
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| Priority Number: |
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| Abstract: |
[From equivalent
EP0158902A2]
A color to monochromatic image transformation which transforms each colour area of the original image into a corresponding area of a monochromatic image having a particular pattern of 'light' and 'dark' dots corresponding to and representing the original color of the area. The dot patterns are selected to provide both gray scale representations of the original colors and differing textural appearances for each color, so as to maximize the discrimination, or distinction, between the areas of the monochromatic image. That is, the transformation of the invention provides an approximation to gray scale representation, in the overall gray scale appearance of the dot patterns, but adds an additional dimension of texture. The monochromatic dot patterns do not necessarily correspond exactly to the colors or gray scale values of the original colors, but are selected to provide visual impressions analogous to the visual impressions provided by the corresponding original colors. The patterns of dots may be selected for each array so as to avoid the creation of artifacts. The visual appearance of alpha-numeric characters and symbols may be enhanced during transformation.
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| Attorney, Agent or Firm: |
Behrens, Dieter, Dr.-Ing. et al ;
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| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
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| Designated Country: |
BE DE FR GB
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| Family: |
Show 15 known family members
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First Claim:
Show all claims |
1. Method for transforming a color image into a monochromatic image,
characterized by the steps of:
providing a plurality of color masks, each color mask corresponding to a color in the original image and comprised of a pattern of light and dark monochrome dots,
wherein
each pattern is selected, in relation to all other patterns, to provide gray scale and textural visual impressions providing discrimination between areas of the monochromatic image, the monochromatic areas corresponding to the originally colored image areas and using in the monochromatic image for each orginally colored area a specific pattern,
and
replacing the color in each area of the color image with the corresponding color pattern mask dot pattern.
[German]
[French]
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Description
Expand description |
+ 1. Field of the Invention
The present invention relates to the processing and representation of color images and, more particularly, to a method and apparatus for the representation of color images in data processing systems having monochromatic output devices, such as printers and CRT displays. In this context, an image may be defined as a visual representation of information wherein the information may be pictorial or textual or both and may be comprised of alphanumeric characters or symbols or graphic characters, symbols or elements or a combination thereof. A color image may be further defined as an image wherein the elements or areas comprising the image, whether alphanumeric or graphic, are defined by various colors.
+ 2. Prior Art
+ SUMMARY Of THE INVENTION
+ Brief Description of the Drawings
+ DESCRIPTION OF A PREFERRED EMBODIMENT
+ 1. Computer System Structure and Operation
+ A. Hardware Structure and Operation
+ a. ALU and Busses
+ b. Internal Control Logic
+ c. Memory
+ d. I/O Devices
+ B. Software Structure and Operation
+ 2. Color To Monochromatic Image Transformation
+ A. Exemplary Image Source Color System
+ B. Image Generation to Screen or Printer
+ 3. Monochromatic Representation of Color
+ 4. Transformation of Color Images to Monochromatic Images
+ 5. Enhancement of Alphanumeric Characters and Symbols In An Image
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