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US 8,805,041 B2Granted
X-ray image processing apparatus, X-ray image processing method, and storage medium for computer program
AssigneeCanon Kabushiki Kaisha
InventorHideaki Miyamoto
Life of this patent
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Abstract
A feature value is extracted from a boundary region that is located between a contrast-agent injection region and a background region in a subtraction image, a gradation curve depending on the feature value is generated, and gradation processing is performed by applying the gradation curve to the subtraction image.
Claims15
An image processing apparatus comprising:
- a subtractor configured to acquire a subtraction image by performing subtraction processing among a plurality of radiographic images that are obtained when an image of an object is captured at different times;
- a first-feature-value extractor configured to extract a first feature value based on a boundary region between a contrast-agent injection region and a background region in the subtraction image;
- and
- a convertor configured to perform gradation conversion for the subtraction image based on the first feature value.
1 more element
An image processing method comprising:
- a subtracting step of acquiring a subtraction image by performing subtraction processing among a plurality of radiographic images that are obtained when an image of an object is captured at different times;
- a first-feature-value extracting step of extracting a first feature value based on a boundary region between a contrast-agent injection region and a background region in the subtraction image;
- and
- a converting step of performing gradation conversion for the subtraction image by using a gradation curve based on the first feature value.
1 more element
Dependencies are inferred from the claim text.