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US 6,389,164 B2Granted
Image segmentation apparatus and method
AssigneeXerox Corporation
InventorsXing Li, Michael E. Meyers, Francis K. Tse
Life of this patent
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Abstract
The present invention provides a method and apparatus for classifying image data. A video peak/valley counter may count peaks and valleys within a window of the input image data. The apparatus and method checks whether any peaks or valleys are located within a neighborhood of a pixel under consideration.
Claims12
An apparatus for classifying image data comprising:
- an input device that receives the image data;
- a peak/valley detection device that receives the image data and determines a peak count and a valley count within a window of the image data around a pixel under consideration, wherein the peak/valley detection device includes a neighborhood checking device that checks whether any peaks or valleys are located within a neighborhood of the pixel under consideration;
- and
- a classification device that determines a class of the pixel under consideration directly based on the value of the greater of a peak count of the peaks within the window and a valley count of the valleys within the window.
1 more element
A method of classifying input image data comprising:
- receiving the image data;
- determining a halftone dot count of a window of the image data including a pixel under consideration;
- if the determined halftone dot count is less than a predetermined number, then checking a neighborhood of the pixel under consideration for any peaks and valleys;
- and
- classifying the pixel under consideration based on the greater of a peak count of a number of peaks within the window and a valley count of a number of valleys within the window.
2 more elements
A method of classifying input image data comprising:
- receiving the image data;
- evaluating pixels within a window of the image data, wherein each of the pixels within the window is evaluated unless any pixel within a neighborhood of a desired pixel has been classified as a peak or a valley;
- and
- classifying the pixel under consideration, when no pixel within the neighborhood is a peak or valley based on the greater of a peak count of the peaks within the window and a valley count of the valleys within the window.
1 more element
An apparatus that classifies image data comprising:
- an image input device that receives the input data;
- a processing device that determines peaks and valleys within a window of the image data, wherein the window includes a neighborhood of pixels about a specified pixel, the processing device determining the peaks and valleys within the window unless a pixel within the neighborhood about the specified pixel has been determined to be a peak or valley;
- and
- a classification device that determines a class of the pixel under consideration based on the greater of a peak count of the peaks within the window and a valley count of the valleys within the window.
1 more element
Dependencies are inferred from the claim text.