X-ray imaging apparatus
First Claim
1. An X-ray imaging apparatus having an X-ray generator for radiating X-rays toward an object, including means for detecting an image formed by X-rays transmitted through the object to obtain first image data, means for image processing the first data detected by the image detecting means, and display means for displaying the result of the image processing from the image processing means, the improvement wherein said image processing means comprises:
- means for measuring the amount of spatial coordinate distortion data for each pixel of said first image data which corresponds to a real lattice point pattern;
means for storing said spatial coordinate distortion data;
means for calculating a first correction data at each pixel of spatial coordinate distortion based on said spatial coordinate distortion data;
first interpoltating means for obtaining a second correction data of spartial coordinate distortion at intermediate pixels between the pixels of calculated first correction data; and
second interpolating means for obtaining pixel intensity data for the intermediate pixels of the second correction data based on the intensity of said first correction data.
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Accused Products
Abstract
An X-ray imaging apparatus irradiates an object with X rays radiated by an X-ray generator, converts an image of the object produced by X-rays transmitted through the object into an electrical signal, processes the X-ray image and visualizes the object image by a display unit. In the imaging apparatus, the amount of spatial coordinate distortion of the picked up image is measured from an image of an object before it is picked up and data representative of the distortion amount is stored in a distortion measuring unit. Addresses of pixels in the collected image, which correspond to the pixel addresses for storing the corrected image, are computed by an interpolating operation using the distortion data, and intensities of the pixels at the computed pixel addresses are computed, by the interpolating operation, from the pixel intensities in the collected image data.
40 Citations
9 Claims
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1. An X-ray imaging apparatus having an X-ray generator for radiating X-rays toward an object, including means for detecting an image formed by X-rays transmitted through the object to obtain first image data, means for image processing the first data detected by the image detecting means, and display means for displaying the result of the image processing from the image processing means, the improvement wherein said image processing means comprises:
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means for measuring the amount of spatial coordinate distortion data for each pixel of said first image data which corresponds to a real lattice point pattern; means for storing said spatial coordinate distortion data; means for calculating a first correction data at each pixel of spatial coordinate distortion based on said spatial coordinate distortion data; first interpoltating means for obtaining a second correction data of spartial coordinate distortion at intermediate pixels between the pixels of calculated first correction data; and second interpolating means for obtaining pixel intensity data for the intermediate pixels of the second correction data based on the intensity of said first correction data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification