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1.发明授权公开(公告)号：US10027967B2
公开(公告)日：2018-07-17
申请号：US15352173
申请日：2016-11-15
发明人： Elena Alshina , Yoon-mi Hong , Woo-jin Han
IPC分类号： H04N19/36 , H04N19/124 , H04N19/63 , H04N19/159 , H04N19/625 , H04N19/61 , H04N19/13 , H04N19/42 , H04N19/40 , H04N19/174 , H04N19/184
摘要： Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.
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2.发明授权公开(公告)号：US09390470B2
公开(公告)日：2016-07-12
申请号：US14636787
申请日：2015-03-03
发明人： Elena Alshina , Alexander Alshin , Nikolay Shlyakhov , Byeong-doo Choi , Yoon-mi Hong , Woo-jin Han , Tammy Lee
IPC分类号： G06K9/32 , G06T3/40 , H04N19/48 , H04N19/80 , H04N19/523 , H04N19/59 , H04N19/117 , H04N19/182 , H04N7/01 , H04N19/30
CPC分类号： G06T3/4007 , G06F17/175 , H04N7/014 , H04N19/117 , H04N19/182 , H04N19/30 , H04N19/48 , H04N19/523 , H04N19/59 , H04N19/80
摘要： Provided are a method and apparatus for interpolating an image. The method includes: selecting a first filter, from among a plurality of different filters, for interpolating between pixel values of integer pixel units, according to an interpolation location; and generating at least one pixel value of at least one fractional pixel unit by interpolating between the pixel values of the integer pixel units by using the selected first filter.
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3.发明授权公开(公告)号：US10091516B2
公开(公告)日：2018-10-02
申请号：US15352252
申请日：2016-11-15
发明人： Elena Alshina , Yoon-mi Hong , Woo-jin Han
IPC分类号： H04N19/36 , H04N19/124 , H04N19/63 , H04N19/159 , H04N19/625 , H04N19/61 , H04N19/13 , H04N19/42 , H04N19/40 , H04N19/174 , H04N19/184
摘要： Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.
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4.发明授权公开(公告)号：US09262804B2
公开(公告)日：2016-02-16
申请号：US14218494
申请日：2014-03-18
发明人： Elena Alshina , Alexander Alshin , Nikolay Shlyakhov , Byeong-doo Choi , Yoon-mi Hong , Woo-jin Han , Tammy Lee
IPC分类号： G06K9/32 , G06T3/40 , H04N19/48 , H04N19/80 , H04N19/523 , H04N19/59 , H04N19/117 , H04N19/182 , H04N7/01 , H04N19/30
CPC分类号： G06T3/4007 , G06F17/175 , H04N7/014 , H04N19/117 , H04N19/182 , H04N19/30 , H04N19/48 , H04N19/523 , H04N19/59 , H04N19/80
摘要： Provided are a method and apparatus for interpolating an image. The method includes: selecting a first filter, from among a plurality of different filters, for interpolating between pixel values of integer pixel units, according to an interpolation location; and generating at least one pixel value of at least one fractional pixel unit by interpolating between the pixel values of the integer pixel units by using the selected first filter.
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公开(公告)号：US09118933B1
公开(公告)日：2015-08-25
申请号：US14632132
申请日：2015-02-26
发明人： Alexander Alshin , Elena Alshina , Jianle Chen , Woo-jin Han , Nikolay Shlyakhov , Yoon-mi Hong
IPC分类号： H04N19/86 , H04N19/635 , H04N19/43 , H04N19/182 , H04N19/59 , H04N19/523 , H04N19/117 , H04N19/82 , H04N19/80 , G06F17/17 , G06T3/40 , G06T5/00 , H04N19/42
CPC分类号： H04N19/86 , G06F17/17 , G06F17/175 , G06T3/4007 , G06T5/002 , H04N19/117 , H04N19/182 , H04N19/186 , H04N19/42 , H04N19/43 , H04N19/521 , H04N19/523 , H04N19/59 , H04N19/635 , H04N19/80 , H04N19/82
摘要： Provided are a method of interpolating an image by determining interpolation filter coefficients, and an apparatus for performing the same. The method includes: differently selecting an interpolation filter, from among interpolation filters for generating at least one sub-pel-unit pixel value located between integer-pel-unit pixels, based on a sub-pel-unit interpolation location and a smoothness; and generating the at least one sub-pel-unit pixel value by interpolating, using the selected interpolation filter, pixel values of the integer-pel-unit pixels.
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公开(公告)号：US10743026B2
公开(公告)日：2020-08-11
申请号：US16561766
申请日：2019-09-05
发明人： Yoon-mi Hong , Woo-jin Han , Min-su Cheon , Jianle Chen
IPC分类号： H04N19/60 , H04N19/126 , H04N19/625 , G06F17/14 , H04N19/176
摘要： A video encoding method, a video encoding apparatus, a video decoding method, and a video decoding apparatus are provided. The video encoding method includes producing a fast transform matrix based on a transform matrix which is used for frequency transformation on a block which has a predetermined size; producing a transformed block by transforming the block having the predetermined size by using the fast transform matrix; and performing scaling with respect to the transformed block in order to correct a difference between the transform matrix used for the frequency transformation and the fast transform matrix.
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公开(公告)号：US10143433B2
公开(公告)日：2018-12-04
申请号：US15118691
申请日：2015-02-12
发明人： Gye-hyun Kim , Jae-sung Lee , Jae-chool Lee , Hae-kyung Jung , Yoon-mi Hong
摘要： A computed tomography (CT) apparatus includes a reconstruction unit which reconstructs a first CT image corresponding to a field of view (FOV) by using a first sinogram acquired by a CT scan of an object; and a correction unit which acquires a second sinogram by performing forward projection on the first CT image and acquires a second CT image by using the second sinogram and a third sinogram representing a portion of the object that is not included in the FOV. Thus, the CT apparatus reduces generation of image errors to thereby provide a high-quality reconstructed CT image.
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8.发明授权公开(公告)号：US10116949B2
公开(公告)日：2018-10-30
申请号：US15352203
申请日：2016-11-15
发明人： Elena Alshina , Yoon-mi Hong , Woo-jin Han
IPC分类号： H04N19/36 , H04N19/124 , H04N19/63 , H04N19/159 , H04N19/625 , H04N19/61 , H04N19/13 , H04N19/42 , H04N19/40 , H04N19/174 , H04N19/184
摘要： Provided are a method and apparatus for encoding a video signal and a method and apparatus for decoding a video signal. The method of encoding the video signal includes: determining an optimum scaling bit depth of the video signal in consideration of a maximum bit number of an intermediate value obtained during transformation of the video signal and a maximum bit precision of the video signal; scaling the video signal according to a local shift value corresponding to a difference between the determined optimum scaling bit depth and an original bit depth of the video signal; and transforming the scaled video signal.
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公开(公告)号：US09993218B2
公开(公告)日：2018-06-12
申请号：US14778864
申请日：2014-03-20
发明人： Yoon-mi Hong , Gye-hyun Kim , Jae-sung Lee , Jae-chool Lee , Hae-kyung Jung
CPC分类号： A61B6/5258 , A61B6/032 , A61B6/4233 , A61B6/52 , A61B6/5205 , G06T11/006 , G06T2211/424
摘要： An image processing method of an image processing apparatus includes projecting centers of pixels of a pixel grid onto a preset common axis, mapping a boundary of a detector cell comprised in the detection unit on the preset common axis, and determining a detector value based on the projecting the centers of the pixels onto the preset common axis and the mapping the boundary of the detector cell on the preset common axis.
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公开(公告)号：US09839403B2
公开(公告)日：2017-12-12
申请号：US14956237
申请日：2015-12-01
发明人： Woo-hyun Nam , Yong-sup Park , Jae-sung Lee , Yun-sub Jung , Yoon-mi Hong
CPC分类号： A61B6/469 , A61B6/037 , A61B6/4441 , A61B6/488 , A61B6/5205 , G06F19/00 , G06T11/005 , G06T2211/424 , G06T2211/432
摘要： A medical imaging apparatus includes a data acquirer configured to acquire measured data acquired by detecting an X-ray transmitted by an X-ray source to an object, and an image processor configured to acquire an initial image based on the measured data, alternately estimate region of interest (ROI)-outside measured data and ROI-inside measured data based on the measured data and the initial image, and acquire a reconstructed image based on the ROI-inside measured data.
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