Method for correcting inhomogeneities in an image, and an imaging apparatus therefor
First Claim
1. A method for correcting an image of an examination object, the method comprising:
- recording the image;
calculating a correction image from the recorded image; and
correcting the recorded image to produce a normalized image by multiplying the correction image by the recorded image, wherein when calculating the correction image, the pixels in the vicinity of the imaged examination object are identified using a signal intensity that is lower than a limiting value, and wherein the identified pixels are allocated signal intensities that are a function of the signal intensity of the pixels in the respective neighborhood.
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Abstract
A method is for correcting inhomogeneities in an image that is recorded from an examination object. The method includes recording an image to be corrected, calculating a correction image from the image to be corrected and correcting the recorded image with the aid of the correction image in order to produce a normalized image by multiplying the correction image by the image to be corrected. When calculating the correction images, the pixels in the vicinity of the imaged examination object are identified with the aid of a signal intensity that is lower than a limiting value. Further, these pixels are allocated signal intensities that in each case are a function of the signal intensity of the pixels in the respective neighborhood.
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Citations
20 Claims
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1. A method for correcting an image of an examination object, the method comprising:
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recording the image; calculating a correction image from the recorded image; and correcting the recorded image to produce a normalized image by multiplying the correction image by the recorded image, wherein when calculating the correction image, the pixels in the vicinity of the imaged examination object are identified using a signal intensity that is lower than a limiting value, and wherein the identified pixels are allocated signal intensities that are a function of the signal intensity of the pixels in the respective neighborhood. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18)
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13. An imaging apparatus for recording an image of an examination object, comprising:
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an image recording unit to record an image to be corrected; a correction copy calculating unit to calculate a correction copy, which produces a correction copy from the recorded image; a filter unit to calculate a normalized correction copy; a correction calculating unit to calculate a correction image, which produces a normalized image by multiplying the correction image by the image to be corrected, the correction copy calculating unit identifying, when calculating the correction copy, the pixels in the vicinity of the imaged examination object with a signal intensity that is lower than a limiting value, and allocating these pixels signal intensities that in each case are a function of the signal intensity of the pixels in the respective neighborhood; and a display unit to display the normalized image. - View Dependent Claims (14)
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19. An apparatus for correcting an image of an examination object, comprising:
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means for recording the image; means for calculating a correction image from the recorded image; and means for correcting the recorded image to produce a normalized image by multiplying the correction image by the recorded image, wherein when calculating the correction image, the pixels in the vicinity of the imaged examination object are identified using a signal intensity that is lower than a limiting value, and wherein the identified pixels are allocated signal intensities that are a function of the signal intensity of the pixels in the respective neighborhood. - View Dependent Claims (20)
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Specification