Back to results
US 6,643,399 B1Granted
Apparatus, method, and computer program product for noise reduction image processing
AssigneeMinolta Co., Ltd.
InventorYoko Fujiwara
Life of this patent
Estimating the term…
Abstract
An apparatus for processing images including a compression-expansion unit, a first under color removing unit, and a second under color removing unit. The compression-expansion unit executes a compression and expansion process on an image data using discrete cosine transform. The first under color removing unit applies the first under color removal process to the image data before the compression and expansion process. The second under color removing unit applies the second under color removal process to the image data after the compression and expansion process.
Claims24
An apparatus for processing images comprising:
- a compression-expansion unit for executing a compression and expansion process on an image data using discrete cosine transform;
- a first under color removing unit for applying an under color removal process to the image data before the compression and expansion process, said first under color removing unit adapted to reduce a density value of image data when the density value is below a first specified value;
- and
- a second under color removing unit for applying an under color removal process to the image data after the compression and expansion process, said second under color removing unit adapted to reduce a density value of image data when the density value is below a second specified value.
1 more element
An apparatus for processing images comprising:
- a compression-expansion unit for executing a compression and expansion process on an image data using discrete cosine transform;
- a first under color removing unit for applying an under color removal process to the image data before the compression and expansion process;
- a second under color removing unit for applying an under color removal process to the image data after the compression and expansion process;
- and
- a setup unit for setting removal amounts of the under color removal processes,
- wherein said setup unit sets up the removal amounts according to a compression ratio of the image data.
3 more elements
An apparatus for processing images comprising:
- a compression-expansion unit for executing a compression and expansion process on an image data using discrete cosine transform;
- a first under color removing unit for applying an under color removal process to the image data before the compression and expansion process;
- a second under color removing unit for applying an under color removal process to the image data after the compression and expansion process;
- and
- a memory unit for storing the image data and a comparison unit for comparing a capacity of the image data and a capacity of said memory unit, wherein, when the capacity of the image data is smaller than the capacity of said memory unit, the under color removal process by the first under color removing unit is executed to the image data while the compression and expansion process is not executed.
2 more elements
A method for processing images comprising the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying an under color removal process to the image data before the compression and expansion process, the under color removal process reducing a density value of image data when the density value is below a specified value;
- and
- applying an under color removal process to the image data after the compression and expansion process, the under color removal process reducing a density value of image data when the density value is below a specified value.
1 more element
A method for processing images comprising the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying an under color removal process to the image data before the compression and expansion process;
- applying an under color removal process to the image data after the compression and expansion process;
- setting removal amounts of the under color removal processes;
- and
- calculating the removal amounts according to a compression ratio of the image data.
3 more elements
A method for processing images comprising the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying an under color removal process to the image data before the compression and expansion process;
- applying an under color removal process to the image data after the compression and expansion process;
- and
- comparing a capacity of the image data and a capacity of a memory unit for storing the image data, wherein the step of executing the compression and expansion process is omitted when the capacity of the image data is smaller than the capacity of the memory unit.
2 more elements
A computer program product for processing images comprising computer code for performing the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying an under color removal process to the image data before the compression and expansion process, the under color removal process reducing a density value of image data when the density value is below a specified value;
- and
- applying an under color removal process to the image data after the compression and expansion process, the under color removal process reducing a density value of image data when the density value is below a specified value.
1 more element
A computer program product for processing images comprising computer code for performing the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying an under color removal process to the image data before the compression and expansion process;
- applying an under color removal process to the image data after the compression and expansion process;
- setting removal amounts of the under color removal processes;
- and
- calculating the removal amounts according to a compression ratio of the image data.
3 more elements
A computer program product for processing images comprising computer code for performing the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying an under color removal process to the image data before the compression and expansion process;
- applying an under color removal process to the image data after the compression and expansion process;
- and
- comparing a capacity of the image data and a capacity of a memory unit for storing the image data, wherein the step of executing the compression and expansion process is omitted when the capacity of the image data is smaller than the capacity of the memory unit.
2 more elements
An apparatus for processing images comprising:
- a compression-expansion unit for executing a compression and expansion process on an image data using discrete cosine transform;
- a first under color removing unit for applying an under color removal process to the image data before the compression and expansion process, the first under color removing unit adapted to reduce a density value of image data when the density value is below a first specified value;
- an under color removal black paint unit for converting image data processed by the first under color removing unit before the compression and expansion process, the under color removal black paint unit adapted to convert the image data from CMY-image data to CMYK-image data;
- and
- a second under color removing unit for applying an under color removal process to the image data after the compression and expansion process, the second under color removing unit adapted to reduce a density value of image data when the density value is below a second specified value.
2 more elements
A method for processing images comprising the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying a first under color removal process to the image data before the compression and expansion process, the first under color removal process reducing a density value of image data when the density value is below a first specified value;
- applying an under color removal black paint process to the image data processed by the first under color removal process before the compression and expansion process, the under color removal black paint process converting the image data from CMY-image data to CMYK-image data;
- and
- applying a second under color removal process to the image data after the compression and expansion process, the second under color removal process reducing a density value of image data when the density value is below a second specified value.
2 more elements
A computer program product for processing images comprising computer code for performing the steps of:
- executing a compression and expansion process on an image data using discrete cosine transform;
- applying a first under color removal process to the image data before the compression and expansion process, the first under color removal process reducing a density value of image data when the density value is below a first specified value;
- applying an under color removal black paint process to the image data processed by the first under color removal process before the compression and expansion process, the under color removal black paint process converting the image data from CMY-image data to CMYK-image data;
- and
- applying a second under color removal process to the image data after the compression and expansion process, the second under color removal process reducing a density value of image data when the density value is below a second specified value.
2 more elements
Dependencies are inferred from the claim text.