Apparatus and method for image processing and storage medium
AssigneeCanon Kabushiki Kaisha
InventorKeiji Tsuchiya
Life of this patent
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Abstract
An image processing apparatus and method including executing high-pass filtering in a column direction on the pixel values of original image data read from a flat panel detector to obtain first image data, and subtracting a value obtained by converting each of the pixel values of the first image data in accordance with an absolute value of a statistic calculated from pixel values in the same pixel row of the first image data from the value of a corresponding pixel of the original image data to obtain processed image data.
Claims15
An image processing apparatus that reduces noise in a row in a reading direction from an original image of an object photographed with an x-ray, the image processing apparatus comprising:
- a first unit configured to extract a high-frequency component from the original image;
- a second unit configured to extract an edge component of the object from the high-frequency component;
- and
- a third unit configured to acquire an image in which the noise in a row is reduced from the original image based on the high-frequency component and the edge component.
An image processing method for processing an original image in each read row from a flat panel detector including a plurality of pixels arrayed in a matrix form, the image processing method comprising;
- extracting a high-frequency component including a noise component in a row direction from the original image;
- and
- reducing a component, in which an edge component of an object is reduced from the high-frequency component, from the original image.
A computer-readable recording medium storing a program, the program causing a computer to process a pixel value of an original image in each row read from a flat panel detector including a plurality of pixels arrayed in a matrix form, the program comprising:
- acquiring a first image in which a high-frequency component including a noise component in a row direction is extracted from the original image;
- acquiring a second image in which the edge component of the object is reduced from the first image;
- and
- reducing the second image from the original image.
An image processing apparatus comprising:
- a flat panel detector configured to convert an x-ray into original image data;
- a first unit configured to execute high-pass filtering on a pixel value of the original image data in a column direction and acquire first image data;
- a second unit configured to acquire second image data in which a pixel value of the first image data is converted into zero if a statistic value of a pixel value calculated from a pixel value in a same row in a first image is larger than a predetermined threshold value;
- and
- a third unit configured to reduce a pixel value of image data based on the second image data from the pixel value of the original image data and acquire processed image data.
An image processing method for processing original image data of an object photographed with an x-ray, the image processing method comprising:
- executing high-pass filtering on a pixel value of the original image data in a column direction and acquiring first image data;
- acquiring second image data in which a pixel value of the first image data is converted into zero if a statistic value of a pixel value calculated from a pixel value in a same row in a first image is larger than a predetermined threshold value;
- and
- reducing a pixel value of image data based on the second image data from the pixel value of the original image data and acquiring processed image data.
An image processing apparatus that reduces noise in a row from an original image of an object photographed with an x-ray, the image processing apparatus comprising:
- a first unit configured to extract a high-frequency component from the original image;
- and
- a second unit configured to extract an edge component of the object from the high-frequency component.
Dependencies are inferred from the claim text.