Post rip image rendering in an electrographic printer to prevent character shift
First Claim
1. A method of altering the appearance of an input digital image when printed, the digital image comprised of an array of pixels and wherein each pixel is assigned a digital value representing marking information, the method comprising the steps of:
- defining each pixel as either a background pixel, interior pixel, or an edge pixel;
identifying enclosed edge pixels located on the edge of enclosed areas of print characters having enclosed areas, and, reassigning the digital value of one or more enclosed edge pixels independently of other pixels.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of altering the appearance of an input digital image when printed, the digital image comprised of an array of pixels and wherein each pixel is assigned a digital value representing marking information, the method comprises the steps of defining each pixel as either a background pixel, interior pixel, or an edge pixel; identifying enclosed edge pixels located on the edge of enclosed areas of print characters having enclosed areas; and, reassigning the digital value of one or more enclosed edge pixels independently of other pixels. The rendering of the present invention occurs post RIP.
8 Citations
24 Claims
-
1. A method of altering the appearance of an input digital image when printed, the digital image comprised of an array of pixels and wherein each pixel is assigned a digital value representing marking information, the method comprising the steps of:
-
defining each pixel as either a background pixel, interior pixel, or an edge pixel;
identifying enclosed edge pixels located on the edge of enclosed areas of print characters having enclosed areas, and, reassigning the digital value of one or more enclosed edge pixels independently of other pixels. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of printing an image comprising the steps of:
-
converting the image into a digital bitmap comprised of an array of pixels wherein each pixel is assigned a digital value representing marking information;
defining each pixel as either a background pixel, interior pixel, or an edge pixel;
identifying enclosed edge pixels located on the edge of enclosed areas of print characters having enclosed areas, and, reassigning the digital value of one or more enclosed edge pixels independently of other pixels. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. An apparatus for altering the appearance of an input digital image when printed, the digital image comprised of an array of pixels and wherein each pixel is assigned a digital value representing marking information, the apparatus comprising:
a rendering circuit for defining each pixel as either a background pixel, interior pixel, or an edge pixel;
identifying enclosed edge pixels located on the edge of enclosed areas of print characters having enclosed areas; and
, reassigning the digital value of one or more enclosed edge pixels independently of other pixels.- View Dependent Claims (14, 15, 16, 17, 18)
-
19. An apparatus for printing an image comprising:
-
a raster image processor for converting the image into a digital bitmap comprised of an array of pixels wherein each pixel is assigned a digital value representing marking information;
a rendering circuit for defining each pixel as either a background pixel, interior pixel, or an edge pixel; and
, reassigning the digital value of one or more edge pixels or interior pixels independently, thereby altering the appearance of the image when printed. - View Dependent Claims (20, 21, 22, 23, 24)
-
Specification