公开(公告)号：US20220360788A1

公开(公告)日：2022-11-10

申请号：US17621550

申请日：2019-06-24

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shiori SUGIMOTO ,  Seishi TAKAMURA ,  Atsushi SHIMIZU

IPC: H04N19/136 ,  H04N19/50 ,  H04N19/46

Abstract: An image encoding method that generates and encodes a gram matrix representing an image feature when encoding an image to be encoded includes a feature map generation step of generating a plurality of feature maps from the image to be encoded; a gram matrix generation step of generating a gram matrix through calculations between/among the feature maps; a representative vector determination step of generating a representative vector and a representative coefficient value by singular value decomposition of the gram matrix; and a vector encoding step of encoding the representative coefficient value and the representative vector.

公开(公告)号：US20220337830A1

公开(公告)日：2022-10-20

申请号：US17620919

申请日：2019-06-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shota ORIHASHI ,  Shinobu KUDO ,  Ryuichi TANIDA ,  Atsushi SHIMIZU

IPC: H04N19/119 ,  H04N19/149 ,  H04N19/159 ,  H04N19/176

Abstract: A coding apparatus is a coding apparatus for coding an original image and includes: a division section that divides the original image into blocks that are a plurality of areas to acquire the plurality of blocks; a determination section that, for each of the blocks, determines whether or not to determine the block as an interpolation target; and a substitution section that substitutes a value of a pixel included in the block determined as the interpolation target, with a value that decreases a code amount of the block determined as the interpolation target. The determination section determines whether or not to determine the area that is a target of the determination as an area that is the interpolation target, using an evaluation based on an accuracy of prediction of an image of the block by intra prediction or inter prediction and a degree of the area that is the interpolation target being a generated one.

公开(公告)号：US20220224907A1

公开(公告)日：2022-07-14

申请号：US17595049

申请日：2019-05-10

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shinobu KUDO ,  Shota ORIHASHI ,  Ryuichi TANIDA ,  Atsushi SHIMIZU

IPC: H04N19/136 ,  H04N19/124

Abstract: An encoding device includes: an association processing unit that associates first encoded data which is encoded data of an original image with second encoded data which is encoded data of a decoded image which is a result of decoding of the encoded data of the original image; and an encoding unit that encodes, based on the result of associating the first encoded data with the second encoded data, a target image which is an image to be encoded.

公开(公告)号：US20220222860A1

公开(公告)日：2022-07-14

申请号：US17595125

申请日：2019-05-23

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Xiaojun WU ,  Masaki KITAHARA ,  Atsushi SHIMIZU

IPC: G06T9/00 ,  G06T3/40

Abstract: A quantization apparatus includes: an imaging unit that converts statistical data at a position in a real space into a pixel value of a coordinate, which is associated with the position, in an image; and a derivation unit that derives a quantization parameter corresponding to a quantization width of the pixel value for each of one or more positions in the real space with respect to a part or a whole of the image. The quantization apparatus may further include a purpose acquisition unit that acquires information indicating a purpose related to statistics. The derivation unit may derive the quantization parameter corresponding to the quantization width that is larger as the pixel value is larger.

公开(公告)号：US20220124350A1

公开(公告)日：2022-04-21

申请号：US17422425

申请日：2020-01-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuya OMORI ,  Takayuki ONISHI ,  Hiroe IWASAKI ,  Atsushi SHIMIZU

IPC: H04N19/167 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

Abstract: A reference region determination device is for determining a reference region to be stored in a reference image buffer, and includes: a motion vector acquisition portion configured to acquire a motion vector for each one of already encoded blocks; a position change amount derivation portion configured to derive a position change amount for the reference region based on the acquired motion vectors; and a reference region determination portion configured to determine a position of the reference region to be used in encoding of a next block for encoding after the already encoded blocks based on the position change amount.

公开(公告)号：US20220094943A1

公开(公告)日：2022-03-24

申请号：US17298221

申请日：2019-12-03

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi SUZUKI ,  Motohiro TAKAGI ,  Kazuya HAYASE ,  Atsushi SHIMIZU

IPC: H04N19/154 ,  H04N19/136 ,  H04N19/85

Abstract: An image processing device includes an image processing unit configured to execute image processing on an image based on an input image and output a result of the image processing, the input image is a post-conversion image obtained by performing image conversion on an original image, and the conversion includes image conversion for further decreasing a data size of the original image while maintaining a feature quantity used in the image processing and processing accuracy of the image processing.

公开(公告)号：US20220007049A1

公开(公告)日：2022-01-06

申请号：US17291394

申请日：2019-11-07

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yoko SOGABE ,  Shiori SUGIMOTO ,  Seishi TAKAMURA ,  Atsushi SHIMIZU

IPC: H04N19/577 ,  H04N19/105 ,  H04N19/182

Abstract: A predictive image acquisition device is a predictive image acquisition device for associating an observation signal, the observation signal being a signal obtained from an original image serving as a decoding target image and being a lower dimensional signal than the original image, a first predictive image having a high correlation with the original image, and a second predictive image having a high correlation with the original image with each other to obtain a combined predictive image, and includes an interpolation factor acquisition unit configured to obtain an interpolation factor set for each pixel of the combined predictive image from the first predictive image, the second predictive image, and the observation signal, and a combined predictive image acquisition unit configured to combine the first predictive image and the second predictive image for each pixel using the interpolation factor to obtain the combined predictive image, and the pixels constituting the observation signal are expressed by a linear sum of the original image.

公开(公告)号：US20210375006A1

公开(公告)日：2021-12-02

申请号：US17282112

申请日：2019-10-03

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Motohiro TAKAGI ,  Kazuya HAYASE ,  Atsushi SHIMIZU

IPC: G06T9/00 ,  H04N19/137 ,  H04N19/60 ,  H04N19/159 ,  H04N19/176 ,  G06N3/08

Abstract: A difference detection device includes a difference detection unit configured to, based on association among a first image and a second image captured at different times and illustrating a substantially identical space and encoding information of each of the first image and the second image, detect difference between a third image and a fourth image captured at different times and illustrating a substantially identical space, and the encoding information is information acquired from data including the first image encoded and data including the second image encoded, before inverse transform processing is executed in decoding processing executed on each of the first image and the second image.

公开(公告)号：US20210329253A1

公开(公告)日：2021-10-21

申请号：US17273271

申请日：2019-08-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shiori SUGIMOTO ,  Seishi TAKAMURA ,  Atsushi SHIMIZU

IPC: H04N19/14 ,  G06K9/62 ,  H04N19/115 ,  H04N19/172 ,  H04N19/80

Abstract: A coding amount estimation device includes: a feature vector generation unit that generates a feature vector on the basis of a feature map generated by an estimation target image and at least one filter set in advance; and a coding amount evaluation unit that evaluates a coding amount of the estimation target image on the basis of the feature vector.

公开(公告)号：US20210329232A1

公开(公告)日：2021-10-21

申请号：US17273157

申请日：2019-08-26

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Shiori SUGIMOTO ,  Seishi TAKAMURA ,  Atsushi SHIMIZU

IPC: H04N19/117 ,  H04N19/86 ,  H04N19/149

Abstract: An image processing device that updates a pixel value of a processing target image and generates a new image generates a first feature vector based on the processing target image and a first feature map generated with at least one pre-decided filter; updates the processing target image to generate an updated image; generates a second feature vector based on the updated image and a second feature map generated with at least one pre-decided filter; performs quality evaluation of the updated image based on the first and second feature vectors and generates a quality feedback vector which is a vector based on a result of the quality evaluation; performs an encoding amount evaluation on the updated image and generates an encoding amount feedback vector which is a vector based on a result of the encoding amount evaluation; and determines an updating amount in updating of the updated image based on the quality feedback vector and the encoding amount feedback vector.