Apparatus, method, and computer program product for image processing
AssigneeMinolta Co., Ltd.
InventorTSUTOMU YAMAZAKI
Life of this patent
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Abstract
An apparatus for image processing including a region detector, a density conversion unit, a compression unit, and an expansion unit. The region detector detects an edge region in an image data. The density conversion unit reduces a density difference within the edge region detected by the region detector. The compression unit compresses the image data within the edge region where the density difference is reduced by the density conversion unit, using the discrete cosine transform. The expansion unit expands the image data compressed by the compression unit.
Claims15
An apparatus for image processing comprising:
- a region detector for detecting an edge region in an image data;
- a density conversion unit for reducing a density difference within the edge region detected by said region detector;
- a compression unit for compressing the image data within the edge region where the density difference is reduced by said density conversion unit, using discrete cosine transform;
- and
- an expansion unit for expanding the image data compressed by said compression unit.
A method for image processing comprising the steps of:
- detecting an edge region within an image data;
- reducing a density difference within the edge region;
- compressing the image data within the edge region where the density difference is reduced, using discrete cosine transform;
- and
- expanding the compressed image data.
A computer program product for image processing comprising the steps of:
- detecting an edge region within an image data;
- reducing a density difference within the edge region;
- compressing the image data within the edge region where the density difference is reduced, using discrete cosine transform;
- and
- expanding the compressed image data.
Dependencies are inferred from the claim text.