公开(公告)号：US20130162871A1

公开(公告)日：2013-06-27

申请号：US13722949

申请日：2012-12-20

Applicant: STMicroelectronics S.r.l.

Inventor： Angelo BOSCO ,  Arcangelo Ranieri BRUNA ,  Davide GIACALONE

IPC: H04N5/217

CPC classification number: H04N5/2176 ,  G06T5/005 ,  G06T2207/10024 ,  G06T2207/20012 ,  H04N5/367 ,  H04N9/045

Abstract: Image defects in digital images are easily detectable by the human eye but may be difficult to detect in a computer-implemented fashion. In an embodiment of a digital-image-acquisition device, defects are removed on the CFA domain before color interpolation takes place. In order to allow cancellation of couplets of defective pixels, a two pass embodiment is presented. Such embodiment presents methods and systems that can remove both couplets and singlets without damaging the image. The system includes a ring corrector that detects a defect in the ring of pixels that surround a central pixel, a singlet corrector that detects and corrects the central pixel and removes a couplet if the ring corrector is activated, whereas if the ring corrector is switched off, the singlet corrector only removes singlets, and a peak-and-valley detector that avoids overcorrection by avoiding correcting signal peaks or valleys in case of spikes or drops in signal.

Abstract translation: 数字图像中的图像缺陷易于被人眼检测，但可能难以以计算机实现的方式检测。 在数字图像采集设备的实施例中，在进行颜色插值之前，在CFA域上去除缺陷。 为了允许消除对偶的有缺陷的像素，提出了两步实施例。 这种实施例提出了可以在不损坏图像的情况下移除对联和单个的方法和系统。 该系统包括环形校正器，其检测环绕中心像素的像素环中的缺陷;单校正器，其检测和校正中心像素，并且如果环形校正器被激活则去耦合，而如果环形校正器被关闭 ，单线校正器仅消除单峰，以及峰谷检测器，通过避免在信号峰值或信号下降时纠正信号峰值或谷值，避免过度校正。