Information processing apparatus, information processing method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorTakeshi Noda
Life of this patent
Estimating the term…
Abstract
An information processing apparatus has a decomposition unit that decomposes an image into multiple frequency component images, a reduction unit that reduces linear noise included in the frequent component images, and a reconstruction unit that reconstructs the frequency component images with reduced linear noise.
Claims26
An image processing apparatus for reducing line noise in an image, the apparatus comprising:
- a processing unit configured to perform frequency decomposition processing on an input image to obtain frequency components of the input image, and to perform weighted average processing in a direction along the line noise on the frequency components;
- an extraction unit configured to extract line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining unit configured to obtain noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction unit configured to reconstruct the noise-reduced frequency components obtained by the obtaining unit.
An image processing apparatus for reducing line noise along a direction in an image, the apparatus comprising:
- a processing unit configured to perform weighted average processing on an input image to obtain a processed input image, and to perform frequency decomposition processing on the processed input image;
- an extraction unit configured to extract line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining unit configured to obtain noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction unit configured to reconstruct the noise-reduced frequency components obtained by the obtaining unit.
An imaging apparatus for reducing line noise in an image, the apparatus comprising:
- an X-ray detector configured to obtain an input image of an object;
- a processing unit configured to perform frequency decomposition processing on the input image to obtain frequency components of the input image, and to perform weighted average processing in a direction along the line noise on the frequency components;
- an extraction unit configured to extract line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining unit configured to obtain noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction unit configured to reconstruct the noise-reduced frequency components obtained by the obtaining unit.
An imaging apparatus for reducing line noise along a direction in an image, the apparatus comprising:
- an X-ray detector configured to obtain an input image of an object;
- a processing unit configured to perform weighted average processing on the input image to obtain a processed input image, and to perform frequency decomposition processing on the processed input image;
- an extraction unit configured to extract line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining unit configured to obtain noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction unit configured to reconstruct the noise-reduced frequency components obtained by the obtaining unit.
An image processing system for reducing line noise in an image, the system comprising:
- a processing unit configured to perform frequency decomposition processing on an input image to obtain frequency components of the input image, and to perform weighted average processing in a direction along the line noise on the frequency components;
- an extraction unit configured to extract line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining unit configured to obtain noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction unit configured to reconstruct the noise-reduced frequency components obtained by the obtaining unit.
An image processing system for reducing line noise along a direction in an image, the system comprising:
- a processing unit configured to perform weighted average processing on an input image to obtain a processed input image, and to perform frequency decomposition processing on the processed input image;
- an extraction unit configured to extract line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining unit configured to obtain noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction unit configured to reconstruct the noise-reduced frequency components obtained by the obtaining unit.
An image processing method that reduces line noise in an image and is executed with an image processing apparatus, the method comprising:
- a processing step of performing frequency decomposition processing on an input image to obtain frequency components of the input image, and performing weighted average processing in a direction along the line noise on the frequency components;
- an extraction step of extracting line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining step of obtaining noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction step of reconstructing the noise-reduced frequency components obtained in the obtaining step.
An image processing method that reduces line noise along a direction in an image and is executed with an image processing apparatus, the method comprising:
- a processing step of performing weighted average processing on an input image to obtain a processed input image, and performing frequency decomposition processing on the processed input image;
- an extraction step of extracting line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining step of obtaining noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction step of reconstructing the noise-reduced frequency components obtained in the obtaining step.
A non-transitory computer-readable storage medium storing a computer program which makes a computer execute an image processing method that reduces line noise in an image and is executed with an image processing apparatus, the method comprising:
- a processing step of performing frequency decomposition processing on an input image to obtain frequency components of the input image, and performing weighted average processing in a direction along the line noise on the frequency components;
- an extraction step of extracting line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining step of obtaining noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction step of reconstructing the noise-reduced frequency components obtained in the obtaining step.
A non-transitory computer-readable storage medium storing a computer program which makes a computer execute an image processing method that reduces line noise along a direction in an image and is executed with an image processing apparatus, the method comprising:
- a processing step of performing weighted average processing on an input image to obtain a processed input image, and performing frequency decomposition processing on the processed input image;
- an extraction step of extracting line noise data of frequency components based on the weighted average processed frequency components;
- an obtaining step of obtaining noise-reduced frequency components by reducing line noise in the frequency components based on the extracted line noise data;
- and
- a reconstruction step of reconstructing the noise-reduced frequency components obtained in the obtaining step.
Dependencies are inferred from the claim text.