Method and system for improved copy quality in a multifunction reprographic system
First Claim
1. A system to generate a continuous tone image from tagged binary encoded image, comprising:
- a pattern identifier generator to generate a pattern identifier value based upon a pattern of pixels around a pixel of interest;
a filter to generate a filter contone value based upon a neighborhood of pixels around a pixel of interest;
a contone value generator, operatively connected to said pattern identifier generator, to generate a generator contone value from said pattern identifier value; and
a selector, operatively connected to said contone value generator and said filter, to select said filter contone value if the pixel of interest corresponds to pictorial pixels and to select said generator contone value if the pixel of interest corresponds to text pixels.
1 Assignment
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Accused Products
Abstract
A method and system reconstructs a contone image from a binary image by first tagging pixels to identify one of a multiplicity of image content types. The tag information and the pattern of bits surrounding the pixel to be converted to a contone value are used to reconstruct a contone image from a binary image. The pattern of bits in the neighborhood is used to generate a unique identifier. The unique identifier is used as the address for a lookup table with the contone value to be used. A filter also generates a contone value. A selector selects between the look-up table contone value and the filter contone value based an image context type.
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Citations
20 Claims
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1. A system to generate a continuous tone image from tagged binary encoded image, comprising:
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a pattern identifier generator to generate a pattern identifier value based upon a pattern of pixels around a pixel of interest; a filter to generate a filter contone value based upon a neighborhood of pixels around a pixel of interest; a contone value generator, operatively connected to said pattern identifier generator, to generate a generator contone value from said pattern identifier value; and a selector, operatively connected to said contone value generator and said filter, to select said filter contone value if the pixel of interest corresponds to pictorial pixels and to select said generator contone value if the pixel of interest corresponds to text pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system to generate a continuous tone image from tagged binary encoded image, comprising:
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a pattern identifier generator to generate a pattern identifier value based upon a pattern of pixels around a pixel of interest; a filter circuit to generate a filter contone value based upon a neighborhood of pixels around a pixel of interest; a contone value generator, operatively connected to said pattern identifier generator, to generate a generator contone value from said pattern identifier value; and a selector, operatively connected to said contone value generator and said filter circuit, to select said filter contone value if the pixel of interest corresponds to pictorial pixels and to select said generator contone value if the pixel of interest corresponds to text pixels. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method to generate a continuous tone image from tagged binary encoded image, comprising:
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generating, using a pattern identifier circuit, a pattern identifier value based upon a pattern of pixels around a pixel of interest; filtering a neighborhood of pixels around a pixel of interest to generate a filter contone value; generating a generator contone value from the pattern identifier value; selecting the filter contone value if the pixel of interest corresponds to pictorial pixels; and selecting the generator contone value if the pixel of interest corresponds to text pixels. - View Dependent Claims (19, 20)
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Specification