公开(公告)号：US20160105595A1

公开(公告)日：2016-04-14

申请号：US14974148

申请日：2015-12-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Tao Huang ,  Jianzhang Li

IPC: H04N5/238 ,  H04N5/225

CPC classification number: H04N5/238 ,  H04N5/2254 ,  H04N17/002

Abstract: An auto-iris control method, including setting a target luminance value of an auto iris; collecting an image at a current moment and calculating a luminance value of the image collected at the current moment; comparing the target luminance value with the luminance value of the image collected at the current moment; comparing an absolute value of the luminance difference at the current moment with a preset luminance difference threshold, determining a status of the auto iris at the current moment, and using a corresponding proportional-integral-derivative (PID) algorithm to calculate a direct current control voltage at the current moment; and adjusting an action of the auto iris according to the calculated direct current control voltage.

Abstract translation: 一种自动光圈控制方法，包括设置自动光圈的目标亮度值; 在当前时刻收集图像并计算在当前时刻收集的图像的亮度值; 将目标亮度值与当前采集的图像的亮度值进行比较; 将当前时刻的亮度差的绝对值与预设的亮度差阈值进行比较，确定当前时刻的自动光圈的状态，并使用相应的比例积分微分（PID）算法来计算直流电流控制 当前电压; 以及根据计算的直流控制电压来调节自动光圈的动作。

公开(公告)号：US09866763B2

公开(公告)日：2018-01-09

申请号：US14974148

申请日：2015-12-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Tao Huang ,  Jianzhang Li

IPC: H04N5/238 ,  H04N17/00 ,  H04N5/225

CPC classification number: H04N5/238 ,  H04N5/2254 ,  H04N17/002

Abstract: An auto-iris control method, including setting a target luminance value of an auto iris; collecting an image at a current moment and calculating a luminance value of the image collected at the current moment; comparing the target luminance value with the luminance value of the image collected at the current moment; comparing an absolute value of the luminance difference at the current moment with a preset luminance difference threshold, determining a status of the auto iris at the current moment, and using a corresponding proportional-integral-derivative (PID) algorithm to calculate a direct current control voltage at the current moment; and adjusting an action of the auto iris according to the calculated direct current control voltage.