公开(公告)号：US20150244918A1

公开(公告)日：2015-08-27

申请号：US14628885

申请日：2015-02-23

Applicant: Axis AB

Inventor： Fredrik Svensson ,  Johan Tuvesson ,  Linda Haals

IPC: H04N5/235 ,  H04N9/77

CPC classification number: H04N5/2353 ,  H04N5/2351 ,  H04N5/2352 ,  H04N5/243 ,  H04N9/77

Abstract: A method for controlling exposure of a camera is disclosed. The method comprises calculating a darkness level and a saturation level with respect to a first image in a video sequence. If the saturation level exceeds a first limit, a target value for a mean intensity value of pixels in images captured by the camera is decreased by an amount which is an increasing function of the darkness level. The decreased target value is used to control the exposure of the camera for images subsequent to the first image in the video sequence, such that the mean intensity value of pixels in the subsequent images approaches the decreased target value.

Abstract translation: 公开了一种用于控制照相机曝光的方法。 该方法包括相对于视频序列中的第一图像来计算黑度级和饱和度级。 如果饱和度超过第一限制，则由摄像机拍摄的图像中的像素的平均强度值的目标值减少黑暗度的增加函数的量。 降低的目标值用于控制摄像机对视频序列中的第一图像之后的图像的曝光，使得后续图像中的像素的平均强度值接近降低的目标值。

公开(公告)号：US09432588B2

公开(公告)日：2016-08-30

申请号：US14628885

申请日：2015-02-23

Applicant: Axis AB

Inventor： Fredrik Svensson ,  Johan Tuvesson ,  Linda Haals

IPC: H04N5/235 ,  H04N9/77 ,  H04N5/243

CPC classification number: H04N5/2353 ,  H04N5/2351 ,  H04N5/2352 ,  H04N5/243 ,  H04N9/77

Abstract: A method for controlling exposure of a camera is disclosed. The method comprises calculating a darkness level and a saturation level with respect to a first image in a video sequence. If the saturation level exceeds a first limit, a target value for a mean intensity value of pixels in images captured by the camera is decreased by an amount which is an increasing function of the darkness level. The decreased target value is used to control the exposure of the camera for images subsequent to the first image in the video sequence, such that the mean intensity value of pixels in the subsequent images approaches the decreased target value.

Abstract translation: 公开了一种用于控制照相机曝光的方法。 该方法包括相对于视频序列中的第一图像来计算黑度级和饱和度级。 如果饱和度超过第一限制，则由摄像机拍摄的图像中的像素的平均强度值的目标值减少黑暗度的增加函数的量。 降低的目标值用于控制摄像机对视频序列中的第一图像之后的图像的曝光，使得后续图像中的像素的平均强度值接近降低的目标值。