公开(公告)号：US20160269656A1

公开(公告)日：2016-09-15

申请号：US14827141

申请日：2015-08-14

Applicant: Apple Inc.

Inventor： Douglas K. Tao ,  Anup K. Sharma

IPC: H04N5/353 ,  H04N5/235

CPC classification number: H04N5/3532 ,  H04N5/2256 ,  H04N5/2357

Abstract: Devices and methods for adjusting an exposure window of a rolling shutter based on a frequency determined from ambient light gathered by a bimodal component are disclosed. Flickering light sources may cause artifacts in captured images, due to interplay between a period of a frequency of ambient light and the exposure window. An image capture device includes a semiconductor component configured to operate in two modes and an exposure window control component configured to compensate for the flickering based on a signal from the light source. In a sensor mode, the semiconductor component may operate to detect the frequency of ambient light. To avoid image artifacts, the frequency of the ambient light is analyzed and an exposure time is adjusted to an integer multiple of the period of the frequency such that exposure is matched to the periodic illumination of the flickering light source.

Abstract translation: 公开了一种用于根据由双模组件聚集的环境光确定的频率来调节卷帘的曝光窗的装置和方法。 由于环境光的频率周期与曝光窗口之间的相互作用，闪烁的光源可能在捕获的图像中造成伪像。 图像捕获装置包括被配置为以两种模式操作的半导体部件和被配置为基于来自光源的信号来补偿闪烁的曝光窗控制部件。 在传感器模式中，半导体部件可以操作以检测环境光的频率。 为了避免图像伪影，分析环境光的频率，并且将曝光时间调整到频率周期的整数倍，使得曝光与闪烁光源的周期性照明相匹配。