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US 8,553,282 B2Granted
Image processing apparatus and method for processing image data including a fundamental stimulus value and spectral auxiliary coefficient
AssigneeCanon Kabushiki Kaisha
InventorShohei Tsutsumi
Life of this patent
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Abstract
This invention reduces an increasing capacity of image data by using PQR (spectral auxiliary coefficients) in addition to CIELAB (fundamental stimulus values), compared to conventional CIELAB. To accomplish this, image data holding fundamental stimulus values and spectral auxiliary coefficients is input. Output colors corresponding the input fundamental stimulus values and spectral auxiliary coefficients are calculated. An image size corresponding to the spectral auxiliary coefficient is smaller than that corresponding to the fundamental stimulus.
Claims23
An image processing apparatus comprising:
- an input unit configured to input image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- an image processing unit configured to perform image processing on the image data, wherein:
- wherein the spectral auxiliary coefficient, included in the image data, corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- a second image size corresponding to the spectral auxiliary coefficient representing the image is smaller than a first image size corresponding to the fundamental stimulus values representing the image.
2 more elements
An image processing apparatus comprising:
- an input unit configured to input image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- an image processing unit configured to perform image processing on the image data, wherein:
- the spectral auxiliary coefficient, included in the image data, corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information, which are included in the image data, the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second image size corresponding to the second coefficient representing the image is smaller than a first image size corresponding to the first coefficient representing the image.
4 more elements
An image processing apparatus comprising:
- an input unit configured to input image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- an image processing unit configured to perform image processing on the image data, wherein:
- the spectral auxiliary coefficient, included in the image data, corresponds to a spectral error between spectral information reconstructed from the plurality of the fundamental stimulus values and spectral information of the image, and
- a second bit count of the spectral auxiliary coefficient is smaller than a first bit count of at least one of the plurality of the fundamental stimulus values.
2 more elements
An image processing apparatus comprising:
- an input unit configured to input image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- an image processing unit configured to perform image processing on the image data, wherein:
- wherein the spectral auxiliary coefficient, included in the image data, corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information, which are included in the image data, the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second bit count of the second coefficient is smaller than a first bit count of the first coefficient.
4 more elements
An image processing apparatus comprising:
- an input unit configured to input spectral information of an image;
- a calculation unit configured to calculate a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- a downscaling unit configured to downscale a third image size corresponding to the spectral auxiliary coefficient;
- and
- a storage unit configured to store, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the downscaled spectral auxiliary coefficient, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- a second image size corresponding to the spectral auxiliary coefficient stored in the image file is smaller than first image size corresponding to at least one of the plurality of the fundamental stimulus values stored in the image file.
4 more elements
An image processing apparatus comprising:
- an input unit configured to input spectral information of an image;
- a calculation unit configured to calculate a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- a downscaling unit configured to downscale a third image size corresponding to the spectral auxiliary coefficient;
- and
- a storage unit configured to store, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the downscaled spectral auxiliary coefficient, wherein:
- wherein the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information, the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second image size corresponding to the second coefficient is smaller than a first image size corresponding to the first coefficient.
6 more elements
An image processing apparatus comprising:
- an input unit configured to input spectral information of an image;
- a calculation unit configured to calculate a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- a reduction unit configured to reduce a bit count of the spectral auxiliary coefficient;
- and
- a storage unit configured to store, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the reduced spectral auxiliary coefficient, wherein
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- the second bit count of the spectral auxiliary coefficient is smaller than a first bit count of at least one of the plurality of the fundamental stimulus values.
4 more elements
An image processing apparatus comprising:
- an input unit configured to input spectral information of an image;
- a calculation unit configured to calculate a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- a reduction unit configured to reduce a bit count of the spectral auxiliary coefficient;
- and
- a storage unit configured to store, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the reduced spectral auxiliary coefficient, wherein
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information,
- the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second bit count of the second coefficient is smaller than a first bit count of the first coefficient.
7 more elements
A method for image processing apparatus comprising the steps of:
- inputting image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- performing image processing on the image data, wherein
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- a second image size corresponding to the spectral auxiliary coefficient representing the image is smaller than a first image size corresponding to at least one of the plurality of the fundamental stimulus values representing the image.
2 more elements
A method for image processing apparatus comprising the steps of:
- inputting image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents the image;
- and
- performing image processing on the image data, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information,
- the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second image size corresponding to the second coefficient representing the image is smaller than a first image size corresponding to the first coefficient representing the image.
5 more elements
A method for image processing apparatus comprising the steps of:
- inputting image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- performing image processing on the image data, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- a second bit count of the spectral auxiliary coefficient is smaller than a first bit count of at least one of the plurality of the fundamental stimulus values.
2 more elements
A method for image processing apparatus comprising the steps of:
- inputting image data which includes a plurality of fundamental stimulus values and a spectral auxiliary coefficient and represents an image;
- and
- performing image processing on the image data, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information,
- the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second bit count of the second coefficient is smaller than a first bit count of the first coefficient.
5 more elements
A method for image processing apparatus comprising the steps of:
- inputting spectral information of an image;
- calculating a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- downscaling a third image size corresponding to the spectral auxiliary coefficient;
- and
- storing, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the downscaled spectral auxiliary coefficient, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- a second image size corresponding to the spectral auxiliary coefficient stored in the image file is smaller than a first image size corresponding to at least one of the plurality of the fundamental stimulus values stored in the image file.
4 more elements
A method for image processing apparatus comprising the steps of:
- inputting spectral information of an image;
- calculating a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- downscaling third image size corresponding to the spectral auxiliary coefficient;
- and
- storing, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the downscaled spectral auxiliary coefficient, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information,
- the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second image size corresponding to the second coefficient is smaller than a first image size corresponding to the first coefficient.
7 more elements
A method for image processing apparatus comprising the steps of:
- inputting spectral information of an image;
- calculating a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- reducing a bit count of the spectral auxiliary coefficient;
- and
- storing, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the reduced spectral auxiliary coefficient, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image, and
- the second bit count of the spectral auxiliary coefficient is smaller than a first bit count of at least one of the plurality of the fundamental stimulus values.
4 more elements
A method for image processing apparatus comprising the steps of:
- inputting spectral information of an image;
- calculating a plurality of fundamental stimulus values and a spectral auxiliary coefficient from the spectral information;
- reducing a bit count of the spectral auxiliary coefficient;
- and
- storing, as an image file, a combination of at least one of the plurality of the calculated fundamental stimulus values and the reduced spectral auxiliary coefficient, wherein:
- the spectral auxiliary coefficient corresponds to a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image,
- the spectral auxiliary coefficient includes a first coefficient and a second coefficient having different degrees of influence on spectral information,
- the degree of influence corresponding to a variation range of each one of the first and second auxiliary coefficients when calculated based on a spectral error between spectral information reconstructed from the plurality of fundamental stimulus values and spectral information of the image;
- and
- a second bit count of the second coefficient is smaller than a first bit count of the first coefficient.
7 more elements
Dependencies are inferred from the claim text.