公开(公告)号：US20180278953A1

公开(公告)日：2018-09-27

申请号：US15928798

申请日：2018-03-22

Applicant: Axis AB

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

IPC: H04N19/55 ,  H04N19/182 ,  H04N19/593

CPC classification number: H04N19/55 ,  H04N19/117 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/503 ,  H04N19/593

Abstract: A method of encoding a video stream comprising receiving a frame of a video stream to be encoded, performing motion detection in the frame to identify steady regions, and temporally filtering the frame so as to provide temporally filtered pixel values. For a pixel in the steady regions of the frame, the temporally filtered pixel value is used when encoding the pixel, on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded. On a condition that the pixel instead belongs to a block of pixels of the frame that will be inter-coded, a value that was used when encoding a corresponding pixel of the immediately preceding frame is used when encoding the pixel.

公开(公告)号：US20150312460A1

公开(公告)日：2015-10-29

申请号：US14696023

申请日：2015-04-24

Applicant: Axis AB

Inventor： Björn Benderius

IPC: H04N5/235

CPC classification number: H04N5/2353 ,  G03B7/00 ,  H04N5/235 ,  H04N5/2356

Abstract: A device and method for determining exposure settings in a camera is disclosed. The method comprises capturing an image frame using an image sensor, the exposure of the capturing is based on an initial exposure value setting, determining a temporary exposure value by finding an exposure value that results in a substantially optimum value when applied to a total cost calculation, calculating a saturated pixels cost related to the saturated pixels for the captured image at the temporary exposure value, determining a next exposure value by finding a decrease in exposure value, in relation to the temporary exposure value, for which decrease a change in total cost for non-saturated pixels, in relation to the total cost for non-saturated pixels at the temporary exposure value, is substantially equal to the saturated pixel cost calculated at the temporary exposure value, using this determined next exposure value for capturing a new image frame.

Abstract translation: 公开了一种用于确定相机中的曝光设置的装置和方法。 该方法包括使用图像传感器拍摄图像帧，拍摄的曝光基于初始曝光值设置，通过在应用于总成本计算时找到导致基本上最佳值的曝光值来确定临时曝光值 计算与临时曝光值下的拍摄图像的饱和像素相关的饱和像素成本，通过找到相对于临时曝光值的曝光值的下降来确定下一曝光值，减少总成本的变化 对于非饱和像素，相对于临时曝光值下的非饱和像素的总成本，基本上等于在临时曝光值下计算的饱和像素成本，使用该确定的下一个曝光值来捕获新的图像帧 。