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公开(公告)号：US20200260074A1
公开(公告)日：2020-08-13
申请号：US16756030
申请日：2018-10-24
Applicant: Sony Corporation
IPC: H04N19/11 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/17
Abstract: An image encoding apparatus comprises a controller configured to select, from a set of prediction directions, a set of candidate prediction directions as a subset of the set of prediction directions, for a current image region of a current image in dependence upon one or more properties of a group of reference samples of the current image applicable to the current image region; and an intra-image predictor configured to predict samples of the current image region with respect to one or more of the group of reference samples of the same image according to a prediction direction between the current sample and a reference position amongst the reference samples; in which the intra-image predictor is configured to select the prediction direction for the current image region from the set of candidate prediction directions.
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公开(公告)号：US20170070717A1
公开(公告)日：2017-03-09
申请号：US15217476
申请日：2016-07-22
Applicant: Sony Corporation
Inventor： Clive Henry GILLARD , Stephen Mark KEATING
Abstract: Colour conversion apparatus comprises mapping circuitry configured to map pixels of an input image having colour components in an input colour space to pixels of an mapped image having colour components in an output colour space, the input colour space and the output colour space being different colour spaces such that at least a subset of colours representable in the input colour space are not representable in the output colour space; processing circuitry configured to process the mapped image by detecting instances, in the colour components of pixels of the mapped image, of representations of negative amounts of a colour component and in response to such a detection in respect of a pixel under test, to increase all of the colour components of the pixel under test by an amount of at least the magnitude of the greatest magnitude negative amount of the colour components of that pixel under test; and output circuitry configured to generate pixels of an output image, having colour components in the output colour space, from pixels of the processed mapped image, the output circuitry being configured to inhibit colour components of pixels of the output image from exceeding a maximum representable colour amount.
Abstract translation: 颜色转换装置包括映射电路，其被配置为将具有输入颜色空间中的颜色分量的输入图像的像素映射到在输出颜色空间中具有颜色分量的映射图像的像素，输入颜色空间和输出颜色空间是不同颜色空间 使得输入颜色空间中可表示的颜色的至少一个子集不能在输出颜色空间中表示; 处理电路，被配置为通过检测映射图像的像素的颜色分量中的颜色分量的负量的表示并且响应于关于被测试像素的这种检测的实例来处理所映射的图像，以增加所有 所测试的像素的颜色分量的至少大小为该被测像素的颜色分量的最大量级的负量的量; 以及输出电路，被配置为从所处理的映射图像的像素生成具有输出颜色空间中的颜色分量的输出图像的像素，输出电路被配置为禁止输出图像的像素的颜色分量超过最大可表示颜色 量。
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公开(公告)号：US20140300644A1
公开(公告)日：2014-10-09
申请号：US14177512
申请日：2014-02-11
Applicant: Sony Corporation
Inventor： Clive Henry GILLARD , Stephen Mark KEATING , Robert Mark Stefan PORTER
IPC: G06T3/40
CPC classification number: H04N5/265 , G06T3/00 , G06T15/20 , H04N5/23238 , H04N5/2628
Abstract: A method of generating a cut-out from an image of a scene which has been captured by a camera is described. The method comprises: defining the position of a virtual camera, the image plane of the virtual camera being the cut out, with respect to the position of the camera capturing the scene;defining a set of pixel positions for the cut out of the captured image; generating a virtual camera rotation matrix to be applied to the defined set of pixel positions, the virtual camera rotation matrix expressing a combination of at least one of the yaw, pitch and roll of the virtual camera; applying the virtual camera rotation matrix to the defined set of pixel positions to determine a corresponding transformed pixel position for each of the defined pixel positions, the transformed pixel positions defining a shape and position of a portion of the captured image of the scene; mapping each of the transformed pixel positions in the set of transformed pixel positions to an associated pixel in the portion of the image of the scene; and establishing a value for each one of pixels of the image cut out in the defined pixel positions corresponding to the transformed pixel positions using the value of the corresponding associated pixel in the portion of the image of the scene which has been determined.
Abstract translation: 描述从摄像机拍摄的场景的图像生成切口的方法。 该方法包括：相对于捕获场景的相机的位置，定义虚拟相机的位置，虚拟相机的图像平面被切出; 定义用于从捕获图像切出的一组像素位置; 生成要应用于所定义的像素位置集合的虚拟相机旋转矩阵，所述虚拟相机旋转矩阵表示虚拟相机的偏航，俯仰和滚动中的至少一个的组合; 将所述虚拟相机旋转矩阵应用于所述定义的像素位置集合，以确定所述定义的像素位置中的每一个的对应的变换像素位置，所述变换的像素位置限定所述场景的所述捕获图像的一部分的形状和位置; 将所述经变换的像素位置的所述经变换的像素位置中的每一个映射到所述场景的所述图像的所述部分中的相关联的像素; 以及使用已经确定的场景的图像的部分中的对应的相关联的像素的值，在对应于变换的像素位置的所定义的像素位置中，为切出的图像的每个像素建立一个值。
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公开(公告)号：US20220038690A1
公开(公告)日：2022-02-03
申请号：US17276328
申请日：2019-08-27
Applicant: SONY CORPORATION
Inventor： Karl James SHARMAN , Stephen Mark KEATING
IPC: H04N19/11 , H04N19/105 , H04N19/96 , H04N19/17 , H04N19/109
Abstract: An image encoding apparatus comprises a selector configured to select a prediction operation, for prediction of samples of a current region of a current image with respect to one or more of a group of reference samples, from a set of candidate prediction operations, at least some of which define, as an intra-image prediction operation, a prediction direction between a current sample to be predicted and a group of reference samples in the same image; and an intra-image predictor configured to derive predicted samples of a current image region from reference samples of the same image in response to selection, by the selector, of an intra-image prediction operation for the current image region; in which: the current region comprises at least a subset of a current coding tree unit (CTU) in an array of CTUs; the group of references samples is disposed, with respect to the current image region at one or more predetermined sides of the current image region; and the selector is configured to inhibit the selection of a prediction operation for the current region,
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公开(公告)号：US20200267410A1
公开(公告)日：2020-08-20
申请号：US16753139
申请日：2018-10-24
Applicant: SONY CORPORATION
IPC: H04N19/593 , H04N19/11 , H04N19/159 , H04N19/167 , H04N19/176
Abstract: An image encoding apparatus comprises a selector configured to select, from a set of candidate prediction operations each defining at least a prediction direction, a prediction operation for prediction of samples of a current region of a current image, the current region comprising an array of two or more rows and two or more columns of samples; an intra-image predictor configured to derive predicted samples of the current region with respect to one or more of a group of reference samples of the same image in dependence upon a prediction direction, defined by the selected prediction operation, between a current sample to be predicted and a reference position amongst the reference samples; in which, for at least some of the candidate prediction operations, the group of reference samples comprises two or more parallel linear arrays of reference samples disposed at different respective separations from the current region; a detector configured to detect whether samples corresponding to any of the two or more parallel linear arrays of reference samples are unavailable for use in prediction of samples of the current region and, if any of the two or more parallel linear arrays of reference samples are unavailable, to inhibit selection, by the selector, of a candidate prediction operation dependent upon the unavailable reference samples.
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公开(公告)号：US20210092415A1
公开(公告)日：2021-03-25
申请号：US16579356
申请日：2019-09-23
Applicant: SONY CORPORATION
Inventor： Stephen Mark KEATING , Karl James SHARMAN , Adrian Richard BROWNE
IPC: H04N19/196 , H04N19/136 , H04N19/11 , H04N19/13 , H04N19/18 , H04N19/124
Abstract: Image data encoding apparatus comprises detector circuitry configured to detect at least one of an upper clipping level and a lower clipping level in samples of input image data; and encoder circuitry configured to encode an encoded representation of the samples of input image data to an encoded data stream, the encoder circuitry being configured to encode a representation of the at least one of the upper clipping level and the lower clipping level to the output data stream.
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公开(公告)号：US20200252606A1
公开(公告)日：2020-08-06
申请号：US16756211
申请日：2018-10-24
Applicant: Sony Corporation
IPC: H04N19/11 , H04N19/159 , H04N19/167 , H04N19/593 , H04N19/105
Abstract: An image decoding apparatus comprises a selector configured to select, from a set of candidate prediction operations each defining at least a prediction direction, a prediction operation for prediction of samples of a current region of a current image, the current region comprising an array of two or more rows and two or more columns of samples; and an intra-image predictor configured to derive predicted samples of the current region with respect to one or more of a group of reference samples of the same image in dependence upon a prediction direction, defined by the selected prediction operation, between a current sample to be predicted and a reference position amongst the reference samples; in which, for at least some of the candidate prediction operations, the group of reference samples comprises two or more parallel linear arrays of reference samples disposed at different respective separations from the current region.
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公开(公告)号：US20220078430A1
公开(公告)日：2022-03-10
申请号：US17276411
申请日：2019-09-24
Applicant: SONY CORPORATION
Inventor： Karl James SHARMAN , Stephen Mark KEATING , Adrian Richard BROWNE
IPC: H04N19/132 , H04N19/105 , H04N19/117 , H04N19/159 , H04N19/186 , H04N19/17
Abstract: Image data encoding and/or decoding apparatus comprises an inter-image predictor configured to predict samples of a current image region, of a plurality of regions of an image in a sequence of images, with respect to a reference image region of another, reference, image of the sequence of images, according to a direction vector indicating a spatial displacement of the reference image region from the current image region;an interpolation filter configured to generate the predicted samples of the current image region by spatial interpolation of samples of the reference image region, at least in instances where the direction vector indicates a spatial displacement of a non-integer number of samples, in which the interpolation filter is configured to operate according to a set of filter parameters each defining the spatial frequency response of a set of filters providing interpolation at a spatial displacement resolution of 1/m sample, where m is an integer greater than one; and a filter response selector configured to select a set of the filter parameters from two or more candidate sets of filter parameters for use in respect of at least the current image region.
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公开(公告)号：US20200221075A1
公开(公告)日：2020-07-09
申请号：US16626183
申请日：2018-07-05
Applicant: SONY CORPORATION
IPC: H04N19/103 , H04N19/14 , H04N19/18 , H04N19/593 , H04N19/82
Abstract: Apparatus comprises an image data encoder to encode a current image region of an image, the image data encoder being operable in at least two modes of operation; a controller to control a mode of operation of the image data encoder in dependence upon the encoded data for the current image region meeting a predetermined criterion; and prediction circuitry configured to predict, from one or more properties of one or more image regions other than the current image region, whether the encoded data for the current image region will meet the predetermined criterion.
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公开(公告)号：US20180300862A1
公开(公告)日：2018-10-18
申请号：US15924455
申请日：2018-03-19
Applicant: Sony Corporation
Inventor： Stephen Mark KEATING
CPC classification number: G06T5/009 , G06T2207/10024 , H04N1/6058 , H04N1/6075
Abstract: Colour conversion apparatus comprises mapping circuitry configured to map pixels of an input image having colour components in an input colour space to pixels of an mapped image having colour components in an output colour space, the input colour space and the output colour space being different colour spaces such that at least a subset of colours representable in the input colour space are not representable in the output colour space; the mapping circuitry being configured to: convert pixels from the input colour space to an intermediate colour space in which a colour space representation of hue approximates to a consistent perceived hue independent of brightness and/or saturation; map pixels in the intermediate colour space which lie outside a region of the intermediate colour space corresponding to representable colours in the output colour space to generate mapped pixels so that the mapped pixels lie within that region, by varying the brightness and/or saturation of those pixels in the intermediate colour space but leaving the hue of those pixels substantially unchanged; and convert the mapped pixels from the intermediate colour space to the output colour space.
