Method and device for correcting image
AssigneesSamsung Electronics Co., Ltd., Research & Business Foundation Sungkyunkwan University
InventorsSihyung Lee, Dongjae Kim, Jae Wook Nam, Wooram Hong
Life of this patent
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Abstract
A method for correcting an image includes: orthographically correcting an image; removing a curtain artifact by applying a first filter to the orthographically corrected image; correcting brightness of the image, from which the curtain artifact is removed, by applying a second filter to the image, from which the curtain artifact is removed. The first filter includes a first function and a second function for a first domain and a second domain, which are orthogonal to each other in a frequency region, and the first filter is differentiable and continuous in the first domain and the second domain.
Claims20
A method for correcting an image comprising:
- orthographically correcting the image;
- transforming the orthographically corrected image into a frequency region;
- removing a curtain artifact by applying a first filter to frequency-transformed image;
- and
- correcting brightness of the image, from which the curtain artifact is removed, by applying a second filter to the image, from which the curtain artifact is removed,
- wherein
- the first filter comprises a first function and a second function for a first domain and a second domain, which are orthogonal to each other in the frequency region,
- the first filter is differentiable and continuous in the first domain and the second domain,
- the curtain artifact is shown in the frequency-transformed image in a first direction corresponding to an irradiation direction of beams irradiated to cut a side of an object, wherein the cut side is captured as the image, and
- a shape of the first filter is a bar type extending in the first direction in the frequency region.
A device for correcting an image comprising:
- a processor;
- a memory which stores a program;
- and
- a wired/wireless communication unit,
- wherein the processor executes a program stored in the memory to perform:
- orthographically correcting the image;
- transforming the orthographically corrected image into a frequency region;
- removing a curtain artifact by applying a first filter to frequency-transformed image;
- and
- correcting brightness of the image, from which the curtain artifact is removed, by applying a second filter to the image from which the curtain artifact is removed,
- wherein the first filter comprises a first function and a second function for a first domain and a second domain that are orthogonal to each other in the frequency region,
- the first filter is differentiable and continuous in the first domain and the second domain,
- the curtain artifact is shown in the frequency-transformed image in a first direction corresponding to an irradiation direction of beams irradiated to cut a side of an object, wherein the cut side is captured as the image, and
- a shape of the first filter is a bar type extending in the first direction of the frequency region.
Dependencies are inferred from the claim text.