Image forming apparatus capable of enhancing resolution of image data in high quality
AssigneeKonica Minolta Business Technologies, Inc.
InventorTomohiro YAMAGUCHI
Life of this patent
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Abstract
MFP matches low-resolution binary image data received by facsimile with a dot pattern showing a jaggy. If there is any matching region, the image data is converted into multivalued image data by performing jaggy correction in which the tone of a target dot in the region is substituted with a grayscale. MFP also generates a region identification attribute code based on the result of matching and the tone of the input image data. MFP enhances the respective resolutions of the image data after jaggy correction and the region identification attribute code. MFP then binarizes the image data having the enhanced resolution once again by a binarization method according to the region identification attribute code having the enhanced resolution.
Claims21
An image forming apparatus comprising:
- an input device for inputting image data;
- and
- a controller configured to control operations of said image forming apparatus on binary image data input by said input device for
- i) performing pattern matching on said image data to detect a jaggy portion, and to reduce jaggies by converting said image data into multivalued image data and substituting said jaggy portion with a grayscale,
- ii) converting a resolution of corrected said image data into a resolution higher than said resolution,
- iii) generating an attribute code indicative of an attribute for each region of corrected said image data and converting a resolution of said attribute code into a resolution equal to the converted resolution of said image data, and
- iv) binarizing said image data having the converted resolution by a binarization method according to said attribute code having the converted resolution.
An image processing method comprising the steps of:
- accepting an input of binary image data;
- performing pattern matching on said image data with a pattern for detecting a jaggy portion;
- if a pattern of any portion of said image data matches said pattern, converting said image data into multivalued image data and substituting a jaggy portion that is said matching portion with a grayscale;
- generating an attribute code indicative of an attribute for each region of said multivalued said image data;
- converting a resolution of said multivalued said image data into a resolution higher than said resolution;
- converting a resolution of said attribute code into a resolution equal to the converted resolution of said image data;
- and
- binarizing said image data having the converted resolution by a binarization method according to said attribute code having the converted resolution.
A medium having a program recorded thereon for causing a computer to execute a resolution conversion process of converting a resolution of image data, said program causing said computer to execute the steps of:
- accepting an input of binary image data;
- performing pattern matching on said image data with a pattern for detecting a jaggy portion;
- if a pattern of any portion of said image data matches said pattern, converting said image data into multivalued image data and substituting a jaggy portion that is said matching portion with a grayscale;
- generating an attribute code indicative of an attribute for each region of said multivalued said image data;
- converting a resolution of said multivalued said image data into a resolution higher than said resolution;
- converting a resolution of said attribute code into a resolution equal to the converted resolution of said image data;
- and
- binarizing said image data having the converted resolution by a binarization method according to said attribute code having the converted resolution.
Dependencies are inferred from the claim text.