Method and apparatus for producing overlapping image area
AssigneeDainippon Screen Mfg. Co., Ltd.
InventorHiroshi Shibazaki
Life of this patent
Estimating the term…
Abstract
An overlapping image area is generated on a boundary between a linework image and a picture image by processing one-page linework data and one-page picture data previously prepared without the overlapping process. The overlapping process includes an outer mode and inner mode. In the outer mode, the linework data is corrected such that an overlapping image area is produced in an effective linework area of the one-page linework image, and the picture data is corrected such that an effective picture area is expanded in the one-page picture image. The corrected picture data and corrected linework data are then combined with each other to form a final composite image.
Claims15
A method of processing linework data representing a one-page color linework image and picture data representing a one-page color picture image to produce a one-page composite image where said linework image and said picture image overlap at least partly with each other, said method comprising the steps of:
- (a) preparing linework data representing a one-page color linework image at a first resolution, said one-page color linework image having an effective linework area on one side of a first boundary and a picture pasting area on the other side of said first boundary, wherein a picture image has priority over a linework image in said picture pasting area;
- (b) preparing picture data representing a one-page color picture image at a second resolution lower than said first resolution, said one-page color picture image having an effective picture area on one side of a second boundary, said second boundary corresponding to said first boundary, said effective picture area corresponding to said picture pasting area in said one-page color linework image;
- (c) correcting said picture data to expand said effective picture area by a predetermined first width;
- (d) correcting said linework data to expand said picture pasting area by a predetermined second width;
- and
- (e) recording a plurality of halftone images of a one-page color composite image of said linework image and said picture image as a function of said corrected picture data and said corrected linework data.
A method of processing linework data representing a one-page color linework image and picture data representing a one-page color picture image to produce a one-page composite image wherein said linework image and said picture image overlap at least partly with each other, said method comprising the steps of:
- (a) preparing linework data representing a one-page color linework image at a first resolution, said one-page color linework image having an effective linework area on a first side of a first boundary, said linework data including image-representation data indicating a plurality of color components at each linework pixel in said linework image, said linework data further including priority data indicating which of a picture image and said linework image has priority at each pixel of said linework image;
- (b) preparing picture data representing a one-page color picture image at a second resolution lower than said first resolution, said one-page color picture image having an effective picture area on a first side of a second boundary, said second boundary corresponding to said first boundary, said first side of said second boundary corresponding to a second side of said first boundary, said picture data including said plurality of color components at each picture pixel in said one-page color picture image;
- (c) selecting one of a first overlapping direction and a second overlapping direction, said first overlapping direction indicating that an overlapping image area is produced in said effective linework area, said second overlapping direction indicating that said overlapping image area is produced in said effective picture area, and selecting at least one target color component out of said plurality of color components;
- (d) correcting said picture data to expand said effective picture area by a predetermined first width when said first overlapping direction is selected at said step (c);
- (e) correcting said image-representation data of said linework data to produce an overlapping image area of a predetermined second width at said first resolution, said overlapping image area extending from said first boundary in said overlapping direction selected in said step (c);
- (f) updating said priority data such that said linework image has priority over said picture image for said target color component in said overlapping image area while said picture image has priority over said linework image for the other color components other than said target color component in said overlapping image area;
- and
- (g) combining said image-representation data with said picture data at a predetermined resolution no less than said first resolution while referring to said priority data updated in said step (f), to thereby record a plurality of halftone images of a one-page color composite image.
An apparatus for processing linework data representing a one-page color linework image and picture data representing a one-page color picture image to produce a one-page composite image where said linework image and said picture image overlap at least partly with each other, said apparatus comprising:
- a first memory for memorizing linework data representing a one-page color linework image at a first resolution, said one-page color linework image having an effective linework area on one side of a first boundary and a picture pasting area on the other side of said first boundary, wherein a picture image has priority over a linework image in said picture pasting area;
- a second memory for memorizing picture data representing a one-page color picture image at a second resolution lower than said first resolution, said one-page color picture image having an effective picture area on one side of a second boundary, said second boundary corresponding to said first boundary, said effective picture area corresponding to said picture pasting area in said one-page color linework image;
- first correcting means for correcting said picture data to expand said effective picture area by a predetermined first width;
- second correcting means for correcting said linework data to expand said picture pasting area by a predetermined second width;
- and
- recording scanner for recording a plurality of halftone images of a one-page color composite image as a function of said corrected picture data and said corrected linework data.
Dependencies are inferred from the claim text.