公开(公告)号：US11539944B2

公开(公告)日：2022-12-27

申请号：US17366129

申请日：2021-07-02

Applicant: Axis AB

Inventor： Fredrik Pihl ,  Malte Johansson

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182

Abstract: There is provided an image pipeline and a method therein for intra-coding an image frame. The image pipeline comprises a processing part followed by an encoding part supporting a plurality of intra-prediction modes used for intra-coding image frames. The method comprises receiving an image frame and for at least one block of pixel values in the image frame: predicting pixel values of the at least one block of pixel values using an intra-prediction mode supported by the encoding part and updating the image frame by adjusting at least one pixel value within the at least one block of pixel values so as to reduce a residual between the at least one pixel value and a corresponding predicted pixel value. Further, the method comprises intra-coding the updated image frame using at least one out of the plurality of intra-prediction modes.

公开(公告)号：US20190191159A1

公开(公告)日：2019-06-20

申请号：US16199225

申请日：2018-11-26

Applicant: Axis AB

Inventor： Fredrik Pihl ,  Xing Danielsson Fan

IPC: H04N19/122 ,  H04N19/137 ,  H04N19/154 ,  H04N19/176

CPC classification number: H04N19/122 ,  H04N19/119 ,  H04N19/136 ,  H04N19/137 ,  H04N19/154 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176

Abstract: The present invention relates to a system and a method for encoding a video stream. The encoding includes determining a level of relevance for areas in an image frame to be included in the video stream, determining a block size value for coding blocks in the image frame, the block size value is depending on the level of relevance determined for the area including each coding block, respectively, encoding the image frame using coding block sizes based on the determined block size values for each of the coding blocks.

公开(公告)号：US10110929B2

公开(公告)日：2018-10-23

申请号：US15246951

申请日：2016-08-25

Applicant: AXIS AB

Inventor： Alexandre Martins ,  Viktor Edpalm ,  Xing Danielsson Fang ,  Lars Persson ,  Fredrik Pihl

IPC: H04N5/232 ,  H04N19/85 ,  G06T5/00 ,  H04N19/172 ,  H04N19/134 ,  H04N19/107 ,  H04N19/117 ,  H04N19/162 ,  H04N19/426 ,  H04N5/225

Abstract: A method of pre-processing digital images captured by an image sensor for encoding is disclosed. The method comprises receiving a first digital image, receiving information representative of a movement of the image sensor at a time of capture of said first digital image), and pre-processing said first digital image. At least one parameter of said pre-processing is dependent on said information representative of movement. A digital image pre-processing system is also disclosed.

公开(公告)号：US20180278849A1

公开(公告)日：2018-09-27

申请号：US15928722

申请日：2018-03-22

Applicant: Axis AB

Inventor： Fredrik Pihl ,  Xing Danielsson Fan ,  Björn Benderius ,  Viktor Edpalm ,  Niclas Svensson ,  Henrik Eliasson

IPC: H04N5/232 ,  H04N19/139 ,  H04N19/105 ,  H04N19/154 ,  H04N19/177

CPC classification number: H04N5/23267 ,  H04N5/23229 ,  H04N5/23232 ,  H04N5/23254 ,  H04N5/243 ,  H04N19/105 ,  H04N19/139 ,  H04N19/154 ,  H04N19/177

Abstract: A method for controlling a video camera which is configured to capture and process image frames prior to encoding. The method comprises determining whether the video camera is going to encode an image frame as an intra-frame or an inter-frame. If the image frame is going to be encoded as an inter-frame, the video camera is controlled to capture and process the image frame using first settings prior to encoding. If the image frame is going to be encoded as an intra-frame, the video camera is controlled to capture and process the image frame using second settings prior to encoding, wherein the second settings are modified in relation to the first settings to further reduce a level of noise in the image frame.

公开(公告)号：US09805287B2

公开(公告)日：2017-10-31

申请号：US14927687

申请日：2015-10-30

Applicant: AXIS AB

Inventor： Viktor Edpalm ,  Lars Persson ,  Xing Danielsson Fan ,  Fredrik Pihl ,  Alexandre Martins

IPC: G06K9/62 ,  H04N19/176 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/85 ,  H04N19/172 ,  H04N19/182 ,  H04N19/60

CPC classification number: G06K9/6215 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/60 ,  H04N19/85

Abstract: A method of identifying relevant areas in digital images is provided. The method comprises receiving information representative of pixels in a first digital image, and calculating a spatial statistical measure of said information for groups of neighboring pixels in said first image to form a group value for each group of pixels. Further, the method comprises calculating differences between group values, and comparing said differences to a predetermined threshold value. If said difference is equal to or above said threshold value, said group is identified as relevant, and if said difference is below said threshold value, said group is identified as not relevant. A method of encoding digital images based on the identification of relevant and non-relevant areas is also provided, as well as a digital encoder system.

公开(公告)号：US20170064338A1

公开(公告)日：2017-03-02

申请号：US15246951

申请日：2016-08-25

Applicant: AXIS AB

Inventor： Alexandre Martins ,  Viktor Edpalm ,  Xing Danielsson Fang ,  Lars Persson ,  Fredrik Pihl

IPC: H04N19/85 ,  H04N5/225 ,  H04N19/426

CPC classification number: H04N19/85 ,  G06T5/00 ,  H04N5/2257 ,  H04N5/23229 ,  H04N19/107 ,  H04N19/117 ,  H04N19/134 ,  H04N19/162 ,  H04N19/172 ,  H04N19/426

Abstract: A method of pre-processing digital images captured by an image sensor for encoding is disclosed. The method comprises receiving a first digital image, receiving information representative of a movement of the image sensor at a time of capture of said first digital image), and pre-processing said first digital image. At least one parameter of said pre-processing is dependent on said information representative of movement. A digital image pre-processing system is also disclosed.

Abstract translation: 公开了一种预处理由图像传感器进行编码的数字图像的预处理方法。 该方法包括接收第一数字图像，接收表示在捕获所述第一数字图像时的图像传感器的移动的信息），以及预处理所述第一数字图像。 所述预处理的至少一个参数取决于表示运动的所述信息。 还公开了数字图像预处理系统。

公开(公告)号：US20160142705A1

公开(公告)日：2016-05-19

申请号：US14939590

申请日：2015-11-12

Applicant: Axis AB

Inventor： Xing Danielsson Fan ,  Viktor Edpalm ,  Fredrik Pihl ,  Lars Persson ,  Alexandre Martins

IPC: H04N19/105 ,  H04N19/107 ,  H04N19/177 ,  H04N19/593 ,  H04N19/182 ,  H04N19/186 ,  H04N19/503 ,  H04N19/114 ,  H04N19/179

CPC classification number: H04N19/105 ,  H04N19/107 ,  H04N19/114 ,  H04N19/137 ,  H04N19/142 ,  H04N19/172 ,  H04N19/177 ,  H04N19/179 ,  H04N19/182 ,  H04N19/186 ,  H04N19/503 ,  H04N19/593 ,  H04N19/87

Abstract: A method for encoding video is disclosed. The method comprises the steps of receiving information representative of pixels in a current digital image frame of a video to be encoded, calculating a group value for each group of neighboring pixels based on the received information, accumulating group values of corresponding groups of pixels in a first sequence of frames to form a first accumulation of accumulated group values, accumulating group values of corresponding groups of pixels in a second sequence of frames to form a second accumulation of accumulated group values, wherein the second sequence includes frames captured over a longer period of time than the first sequence, comparing accumulated group values of the first accumulation with accumulated group values of the second accumulation, calculating a global change value based on the comparison, setting a GOP length based on the global change value; and encoding the current image frame as an intra-frame or inter-frame based on the GOP length. An encoder system for encoding video is also disclosed.

Abstract translation: 公开了一种视频编码方法。 该方法包括以下步骤：接收表示要编码的视频的当前数字图像帧中的像素的信息，基于接收的信息计算每组相邻像素的组值，累积相应像素组的组值 第一序列的帧以形成累积的组值的第一累积，在第二帧序列中累加相应的像素组的组值，以形成累积组值的第二累加，其中第二序列包括在较长时间段 比较所述第一序列的时间，比较所述第一累积的累积组值与所述第二累积的累积组值，基于所述比较计算全局变化值，基于所述全局变化值设置GOP长度; 并且基于GOP长度将当前图像帧编码为帧内或帧间。 还公开了一种用于编码视频的编码器系统。

公开(公告)号：US20160140421A1

公开(公告)日：2016-05-19

申请号：US14927687

申请日：2015-10-30

Applicant: AXIS AB

Inventor： Viktor Edpalm ,  Lars Persson ,  Xing Danielsson Fan ,  Fredrik Pihl ,  Alexandre Martins

IPC: G06K9/62 ,  H04N19/182 ,  H04N19/172 ,  H04N19/176 ,  H04N19/60

CPC classification number: G06K9/6215 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/60 ,  H04N19/85

Abstract: A method of identifying relevant areas in digital images is provided. The method comprises receiving information representative of pixels in a first digital image, and calculating a spatial statistical measure of said information for groups of neighboring pixels in said first image to form a group value for each group of pixels. Further, the method comprises calculating differences between group values, and comparing said differences to a predetermined threshold value. If said difference is equal to or above said threshold value, said group is identified as relevant, and if said difference is below said threshold value, said group is identified as not relevant. A method of encoding digital images based on the identification of relevant and non-relevant areas is also provided, as well as a digital encoder system.

Abstract translation: 提供了识别数字图像中相关区域的方法。 该方法包括接收表示第一数字图像中的像素的信息，以及计算所述第一图像中的相邻像素组的所述信息的空间统计量度，以形成每组像素的组值。 此外，该方法包括计算组值之间的差异，并将所述差异与预定阈值进行比较。 如果所述差值等于或高于所述阈值，则所述组被识别为相关，并且如果所述差值低于所述阈值，则所述组被识别为不相关。 还提供了一种基于相关和非相关区域的识别对数字图像进行编码的方法，以及数字编码器系统。