Reference grid rectilinear correction
AssigneeInternational Business Machines Corporation
InventorsAlbert D. Edgar, Steven C. Penn
Life of this patent
Estimating the term…
Abstract
A scanner for copying an image from substrate including a substrate holder for holding the substrate having a reference grid preferably disposed to one side of the substrate. The scanning means, e.g., a CCD array, simultaneously scans the image and the reference grid as the substrate holder is moved relative to the scanning means. The scanner contains software and/or hardware for interpreting the sensed portion of the reference grid as a position. The position is associated with the raw scan line of the image which was sensed at the same time as the sensed portion of the reference grid.
Claims18
A scanner for copying an image from substrate comprising:
- a scanning means for sensing the substrate image and a reference grid disposed proximate to the substrate;
- transport means for moving the substrate and reference grid relative to the scanning means;
- means for interpreting a sensed portion of the reference grid as a position and associating the position with a contemporaneously sensed raw scan line of the image;
- and
- means for processing sensed pixels in raw scan lines to processed pixels at a chosen spacing in an image buffer according to the positions associated with the raw scan image buffer lines, wherein several sensed pixels are weighted together to calculate a processed pixel.
A method for copying an image from substrate comprising the steps of:
- scanning the substrate and a reference grid disposed proximate to the substrate;
- interpreting a sensed portion of the reference grid as a position;
- associating the position with a contemporaneously sensed raw scan line of the image;
- and
- processing sensed pixels in raw scan lines to processed pixels at a chosen spacing in an image buffer according to the positions associated with the raw scan lines, wherein several sensed pixels are weighted together to calculate a processed pixel.
A scanner for copying an image from substrate comprising:
- a scanning means for sensing the substrate image and a reference grid disposed proximate to the substrate;
- transport means for moving the substrate and reference grid relative to the scanning means;
- and
- means for interpreting a sensed portion of the reference grid as a horizontal and vertical position and associating the position with a contemporaneously sensed raw scan line of the image to establish a relative horizontal and vertical position of the raw scan line.
A method for copying an image from substrate comprising the steps of:
- scanning the substrate and a reference grid disposed proximate to the substrate;
- interpreting a sensed portion of the reference grid as a horizontal and vertical position;
- and
- associating the position with a contemporaneously sensed raw scan line of the image to establish a relative horizontal and vertical position of the raw scan line.
Dependencies are inferred from the claim text.