Methods and apparatus for converting the resolution of binary image data
AssigneeElectronics for Imaging, Inc.
InventorLai Chee Man
Life of this patent
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Abstract
Methods and apparatus are provided for converting binary image data at a first resolution to binary image data at a second resolution, the methods including detecting the edges of the binary image data, sampling a corresponding point on or substantially near each of the edges, fitting a curve between the sampled points, and re-sampling the curve at the second resolution.
Claims15
A method for converting binary image data at a first resolution to binary image data at a second resolution, the method comprising:
- detecting a plurality of edges of the binary image data;
- sampling a corresponding point at substantially the midpoint of each of the edges;
- fitting a curve between the sampled points;
- and
- re-sampling the curve at the second resolution.
A method for converting binary image data at a first resolution to binary image data at a second resolution, the method comprising:
- detecting a plurality of edges of the binary image data;
- sampling a corresponding point substantially near each of the edges;
- fitting a curve by consecutively connecting a plurality of straight line segments between the sampled points;
- and
- re-sampling the curve at the second resolution.
A method for converting binary image data at a first resolution to binary image data at a second resolution, the method comprising:
- detecting a plurality of edges of the binary image data;
- sampling a corresponding point substantially near each of the edges;
- fitting a curve between the sampled points;
- and
- re-sampling the curve at the second resolution by comparing a value of the curve with a midpoint of a square at the second resolution.
Dependencies are inferred from the claim text.