Method of and apparatus for correcting contour of image
AssigneeDainippon Screen Mfg. Co., Ltd.
InventorMakoto Hirosawa
Life of this patent
Estimating the term…
Abstract
A contour of an image is corrected to prevent a dropout in a multicolor print due to registration mismatch. Vector data of two supplemental contours C2a and C2b are obtained from vector data of a contour subjected to the contour correction. The supplemental contours are distanced by a length W from the contour C2. Densities of image parts R1and R2 within the contour correction region R2m that is defined by the supplemental contours are compared with each other, and the higher density (or the lower density) is selected as a correction density for the contour correction region. The contour correction region is filled with the correction density; this is equivalent to shifting the contour C2 to either of the two supplemental contours.
Claims23
A method of correcting a contour of an image part in an integrated image comprising plural image parts, comprising the steps of:
- (a) drawing two supplemental contours with a supplemental contour production means, each supplemental contour being disposed on a respective side of said contour and being spaced from said contour by a predetermined distance and extending along the entirety of said contour;
- (b) comparing, by using a correction density determination means, first and second densities of first and second portions of a contour correction region defined between said two supplemental contours, said first and second portions being located on opposed sides of said contour, and determining a correction density in said contour correction region on the basis of said comparison;
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- (c) filling said contour correction region with said correction density to substantially obtain a corrected contour.
A method of correcting a contour of an image part in an integrated image comprising plural image parts, comprising the steps of:
- (a) preparing and storing in a memory means image part data representing said image parts, and contour data representing said contour;
- (b) obtaining two sets of supplemental contour data representing two supplemental contours with a supplemental contour production means, each said supplemental contour being spaced from said contour by a predetermined distance and extending along the entirety of said contour and being disposed on a respective side of said contour;
- (c) comparing, by using a correction density determination means, on the basis of said image part data, first and second densities of first and second portions of a contour correction region defined between said two supplemental contours, said first and second portions being located on opposed sides of said contour, and determining a correction density in said contour correction region on the basis of said comparison;
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- (d) producing corrected integrated-image data representing a corrected integrated-image filled with said correction density.
An apparatus for correcting a contour of an image part in an integrated image comprising plural image parts, comprising:
- memory means for storing image part data representing said respective image parts and contouring data representing said contour;
- supplemental contour production means for obtaining two sets of supplemental contour data representing two supplemental contours, each said supplemental contour being spaced from said contour by a predetermined distance and extending along the entirety of said contour and being disposed on a respective side of said contour;
- correction density determination means for comparing, on the basis of said image part data, first and second densities of first and second portions of a contour correction region defined between said two supplemental contours, said first and second portions being located on opposed sides of said contour, and determining a correction density in said contour correction region on the basis of said comparison;
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- corrected data production means for producing corrected integrated-image data representing a corrected integrated-image filled with said correction density.
Dependencies are inferred from the claim text.