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US 8,014,627 B2Granted
Image processing apparatus, imaging apparatus, image processing method, and computer program product
AssigneeRicoh Company, Ltd.
InventorHaike Guan
Life of this patent
Estimating the term…
Abstract
An image-information acquiring unit acquires image information. A component separating unit separates the image information acquired into luminance information and color information. A luminance-component-noise removing unit removes noise from the luminance information using a first noise removing method. A color-component-noise removing unit removes noise from the color information using a second noise removing method different from the first noise removing method used in the luminance-component-noise removing unit.
Claims13
An image processing apparatus comprising:
- an image-information acquiring unit to acquire image information;
- an image-component separating unit to separate the image information acquired by the image-information acquiring unit into luminance information and color information;
- a luminance-noise removing unit to remove noise from the luminance information by using a first noise removing method, wherein the luminance-noise removing unit uses, as the first noise removing method, a luminance filter that removes noise associated with the luminance information;
- a color-noise removing unit to remove noise from the color information by using a second noise removing method different from the first noise removing method, wherein the color-noise removing unit uses, as the second noise removing method, a color filter that removes noise associated with the color information;
- a filter-size storing unit to store therein a table showing association among imaging conditions indicating an imaging state at the time of imaging of the image information, filter sizes of the luminance filter, and filter sizes of the color filter, wherein the filter size of the color filter is set to be larger than the size of the luminance filter;
- and
- an imaging-condition acquiring unit to acquire the imaging conditions, wherein
- the luminance-noise removing unit specifies, by referring to the table stored in the filter-size storing unit, a filter size of the luminance filter associated with the imaging conditions, which are acquired by the imaging-condition acquiring unit, and removes noise using the luminance filter of specified filter size, and
- the color-noise removing unit specifies, by referring to the table stored in the filter-size storing unit, a filter size of the color filter associated with the imaging conditions, which are acquired by the imaging-condition acquiring unit, and removes noise using the color filter of specified filter size.
6 more elements
An image processing method comprising:
- acquiring image information;
- separating the image information acquired at the acquiring into luminance information and color information;
- removing noise from the luminance information by using a first noise removing method, wherein removing noise using the first noise removing method includes using, as the first noise removing method, a luminance filter that removes noise of the luminance information;
- removing noise from the color information by using a second noise removing method different from the first noise removing method, wherein removing noise using the second noise removing method includes using, as the second noise removing method, a color filter that removes noise of the color information;
- and
- storing a table showing association among imaging conditions indicating an imaging state at the time of imaging of the image information, filter sizes of the luminance filter, and filter sizes of the color filter, wherein the filter size of the color filter is set to be larger than the size of the luminance filter in a filter-size storing unit;
- and
- acquiring the imaging conditions, wherein
- removing noise using the first noise removing method includes specifying, by referring to the table stored in the filter-size storing unit, a filter size of the luminance filter associated with the imaging conditions acquired at the acquiring, and removing noise using the luminance filter of specified filter size, and
- removing noise using the second noise removing method includes specifying, by referring to the table stored in the filter-size storing unit, a filter size of the color filter associated with the imaging conditions acquired at the acquiring, and removing noise using the color filter of specified filter size.
7 more elements
A non-transitory computer readable storage medium having computer readable program codes embodied in the medium that when executed causes a computer to execute a method comprising:
- acquiring image information;
- separating the image information acquired at the acquiring into luminance information and color information;
- removing noise from the luminance information by using a first noise removing method, wherein removing noise using the first noise removing method includes using, as the first noise removing method, a luminance filter that removes noise of the luminance information;
- removing noise from the color information by using a second noise removing method different from the first noise removing method, wherein removing noise using the second noise removing method includes using, as the second noise removing method, a color filter that removes noise of the color information;
- and
- storing a table showing association among imaging conditions indicating an imaging state at the time of imaging of the image information, filter sizes of the luminance filter, and filter sizes of the color filter, wherein the filter size of the color filter is set to be larger than the size of the luminance filter in a filter-size storing unit;
- and
- acquiring the imaging conditions, wherein
- removing noise using the first noise removing method includes specifying, by referring to the table stored in the filter-size storing unit, a filter size of the luminance filter associated with the imaging conditions acquired at the acquiring, and removing noise using the luminance filter of specified filter size, and
- removing noise using the second noise removing method includes specifying, by referring to the table stored in the filter-size storing unit, a filter size of the color filter associated with the imaging conditions acquired at the acquiring, and removing noise using the color filter of specified filter size.
7 more elements
Dependencies are inferred from the claim text.