公开(公告)号：US10997695B2

公开(公告)日：2021-05-04

申请号：US16082067

申请日：2017-03-03

Applicant: NEC Corporation

Inventor： Kenta Senzaki

IPC: G06T5/00 ,  G06T5/10

Abstract: The present invention suppresses noise that is possibly generated due to threshold processing during frequency conversion. The image processing device 100 includes: a threshold processing unit 110 for executing threshold processing, by using a first parameter for conversion coefficients of respective frequency components that are obtained by frequency conversion of a block consisting of multiple pixels; a calculation unit 120 for calculating feature quantities of the constituent multiple pixels of the block; a determination unit 130 for determining a second parameter on the basis of the calculated feature quantities; and a correction unit 140 for correcting, by using the determined second parameter, the threshold-processed conversion coefficients of the respective frequency components.

公开(公告)号：US10097847B2

公开(公告)日：2018-10-09

申请号：US15344635

申请日：2016-11-07

Applicant: NEC CORPORATION

Inventor： Keiichi Chono ,  Yuzo Senda ,  Junji Tajime ,  Hirofumi Aoki ,  Kenta Senzaki

IPC: H04N7/12 ,  H04N19/44 ,  H04N19/61 ,  H04N19/91 ,  H04N19/182

Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.

公开(公告)号：US10095958B2

公开(公告)日：2018-10-09

申请号：US15125398

申请日：2015-03-20

Applicant: NEC Corporation

Inventor： Masato Tsukada ,  Masato Toda ,  Kenta Senzaki

IPC: G06K9/46 ,  G06K9/66 ,  G06K9/62 ,  G01N21/53 ,  G06T5/00 ,  G08B17/12 ,  G01N21/85 ,  G06K9/40 ,  G01N21/17

Abstract: In order to properly detect an outbreak of smoke using a photographic image, this detection device is equipped with an extraction unit, a calculation unit, and a detection unit. By using an image analysis result of an input image, that is, a photographic image captured of a scene under surveillance, the extraction unit generates an image for which a noise component is removed from the input image. By using brightness information contained in the generated image, the calculation unit calculates an attenuation factor of reflected light from a captured object in the input image. The detection unit determines whether an outbreak of smoke is present in the scene under surveillance based on the attenuation factor.

公开(公告)号：US09712826B2

公开(公告)日：2017-07-18

申请号：US14877453

申请日：2015-10-07

Applicant: NEC CORPORATION

Inventor： Kenta Senzaki ,  Yuzo Senda ,  Keiichi Chono ,  Hirofumi Aoki

IPC: H04N19/119 ,  H04N19/109 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/65 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/147 ,  H04N19/109 ,  H04N19/119 ,  H04N19/157 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/65 ,  H04N19/70 ,  H04N19/91

Abstract: A video decoding device for decoding video using inter prediction comprises decoding control unit setting partition type of CU to be decoded to a type other than N×N which indicates a size of PU obtained by dividing a CU to be decoded is a minimum size, when a prediction mode of the CU to be decoded is an inter prediction and a size of the CU to be decoded is equal to a minimum CU size.

公开(公告)号：US20150086129A1

公开(公告)日：2015-03-26

申请号：US14396061

申请日：2013-04-24

Applicant: NEC Corporation

Inventor： Kenta Senzaki ,  Masato Tsukada ,  Hiroaki Kawaguchi

IPC: G06T5/20 ,  G06T5/00

CPC classification number: G06T5/20 ,  G06T5/002 ,  G06T2207/20016 ,  G06T2207/20076 ,  H04N5/2173 ,  H04N5/357

Abstract: The method includes: calculating a pixel statistical value and edge of pixels for each of areas of a multi-layer, the areas each containing a target pixel and having a successively decreased range; correcting the edge based on a pixel statistical value of an area that is wider than a specific area; correcting difference between a pixel statistical value of the specific area and the pixel statistical value of the area that is wider than the specific area using the post-correction edge; correcting the pixel statistical value of the specific area using post-correction difference and the pixel statistical value of the area that is wider than the specific area; and correcting the target pixel by repeating correction of the pixel statistical value of the specific area successively in each area until the area reduces its range from the maximum range to the minimum range.

Abstract translation: 该方法包括：计算多层的每个区域的像素统计值和像素边缘，每个区域包含目标像素并具有连续减小的范围; 基于比特定区域宽的区域的像素统计值来校正边缘; 使用所述校正后边缘来校正所述特定区域的像素统计值和比所述特定区域宽的区域的像素统计值之间的差异; 使用校正后差异以及比特定区域宽的区域的像素统计值来校正特定区域的像素统计值; 并且通过在每个区域中连续地重复校正特定区域的像素统计值来校正目标像素，直到该区域将其范围从最大范围减小到最小范围。

公开(公告)号：US12219151B2

公开(公告)日：2025-02-04

申请号：US18420902

申请日：2024-01-24

Applicant: NEC Corporation

Inventor： Kenta Senzaki ,  Yuzo Senda ,  Keiichi Chono ,  Hirofumi Aoki

IPC: H04N19/103 ,  H04N19/109 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/70 ,  H04N19/65 ,  H04N19/91

Abstract: The video encoding device for encoding video using inter prediction includes a unit which determines to perform an entropy-encoding process of encoding a PU (Prediction Unit) partition type syntax of a CU (Coding Unit) to be encoded, based on a prediction mode of the CU to be encoded being an inter prediction mode and a size of the CU to be encoded being equal to a predetermined minimum inter-PU size.

公开(公告)号：US11659188B2

公开(公告)日：2023-05-23

申请号：US17686723

申请日：2022-03-04

Applicant: NEC Corporation

Inventor： Keiichi Chono ,  Yuzo Senda ,  Junji Tajime ,  Hirofumi Aoki ,  Kenta Senzaki

IPC: H04N19/156 ,  H04N19/503 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/593 ,  H04N19/12 ,  H04N19/172 ,  H04N19/184

CPC classification number: H04N19/156 ,  H04N19/12 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593 ,  H04N19/61

Abstract: A video decoding device and method, including extracting PCM block size information including a threshold, from a bitstream, determining the threshold based on the extracted PCM block size information; parsing a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold, controlling an entropy decoding process and a PCM decoding process based on the parsed PCM header; parsing transformed data of a prediction error data of an image in the bitstream; and PCM-decoding PCM data of the image in the bitstream, wherein the decoding performs the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold.

公开(公告)号：US20230133519A1

公开(公告)日：2023-05-04

申请号：US17918156

申请日：2020-04-17

Applicant: NEC Corporation

Inventor： Azusa Sawada ,  Kenta Senzaki ,  Takashi Shibata ,  Takashi Shibata

IPC: G06V10/26 ,  G06V10/28 ,  G06V10/20 ,  G06V10/60 ,  G01S13/90

Abstract: An image processing device 100 of the present invention includes an image generation means 121 for generating a difference image representing a difference between an object image that is an image including an area from which a mobile body is to be detected and a corresponding image that is another image including an area corresponding to the area of the object image, and a detection means 122 for detecting the mobile body from the object image on the basis of the object image, the corresponding image, and the difference image.

公开(公告)号：US10964002B2

公开(公告)日：2021-03-30

申请号：US16345278

申请日：2016-11-08

Applicant: NEC Corporation

Inventor： Kenta Senzaki

IPC: G06K9/00 ,  G06T5/50 ,  G06T5/00 ,  H04N5/365 ,  H04N5/357 ,  H04N1/40 ,  H04N5/217

Abstract: An image processing apparatus 10 includes a first generation unit 11 which generates a plurality of lower-resolution images having different row-direction resolutions by changing a resolution in a row direction of an image to be processed to a plurality of lower resolutions, a second generation unit 12 which generates a differential image by taking a difference between two of the plurality of lower-resolution images, and a computation unit 13 which computes a correction amount for the pixel values of a predetermined column of the image to be processed by use of a statistical quantity of the pixel values of a predetermined column of the differential image.

公开(公告)号：US10438323B2

公开(公告)日：2019-10-08

申请号：US15507803

申请日：2015-09-17

Applicant: NEC Corporation

Inventor： Kenta Senzaki ,  Masato Toda

IPC: G06K9/40 ,  G06T5/00 ,  H04N1/409 ,  G06T7/13 ,  G06K9/46 ,  G06T5/20 ,  H04N1/407 ,  H04N5/235

Abstract: The present invention provides an image processing method, an image processing device, and an image processing program which require low computing costs and with which it is possible to minimize noise amplification and halo generation caused by HDR. An image processing device according to one embodiment of the present invention has: a multi-resolution image generation means for generating a multi-resolution image; a correction amount calculation means for calculating a brightness correction amount on the basis of a lowest-resolution image of the multi-resolution image, a differential image between adjacent resolutions of the multi-resolution image, and edge information calculated at each resolution of the multi-resolution image; and a noise suppression means for calculating, on the basis of the lowest-resolution image, the differential image between adjacent resolutions, the edge information, and the brightness correction amount, an image after brightness correction in which a noise component is suppressed.