公开(公告)号：US09451187B2

公开(公告)日：2016-09-20

申请号：US13732211

申请日：2012-12-31

Applicant: NVIDIA Corporation

Inventor： Noy Cohen ,  Ricardo J. Motta

IPC: H04N5/357 ,  H04N5/225

CPC classification number: H04N5/3572 ,  H04N5/2257

Abstract: Embodiments of the present invention are directed to methods and systems for performing automatic lens shading correction using module-specific calibrations. According to one aspect of the invention, a method is provided that is performed over three main stages. During a first stage, radial symmetric component data is determined that is common to camera modules of the type to be calibrated. During the second stage, the actual measurement of the shading profile of one or more specific camera modules is performed. In the third and final stage is the extrapolation stage, the base measurement surfaces of a camera module type determined in the first stage are extrapolated and modified with the module-specific Bezier correction surface and calibration data of the second stage. The output surfaces of this third and final stage are used to correct for the shading profile in the camera module, depending on the light-source estimation.

Abstract translation: 本发明的实施例涉及使用模块特定校准来执行自动透镜阴影校正的方法和系统。 根据本发明的一个方面，提供一种在三个主要阶段执行的方法。 在第一阶段期间，确定对于要校准类型的相机模块是共同的径向对称分量数据。 在第二阶段期间，执行一个或多个特定相机模块的阴影轮廓的实际测量。 在第三阶段和最后阶段是外推阶段，第一阶段确定的摄像机模块类型的基本测量表面用第二阶段的模块特定贝塞尔校正曲面和校准数据进行外推和修改。 根据光源估计，第三和最后一级的输出表面用于校正摄像机模块中的阴影轮廓。

公开(公告)号：US20140184813A1

公开(公告)日：2014-07-03

申请号：US13732211

申请日：2012-12-31

Applicant: NVIDIA CORPORATION

Inventor： Noy Cohen ,  Ricardo J. Motta

IPC: H04N17/00

CPC classification number: H04N5/3572 ,  H04N5/2257

Abstract: Embodiments of the present invention are directed to methods and systems for performing automatic lens shading correction using module-specific calibrations. According to one aspect of the invention, a method is provided that is performed over three main stages. During a first stage, radial symmetric component data is determined that is common to camera modules of the type to be calibrated. During the second stage, the actual measurement of the shading profile of one or more specific camera modules is performed. In the third and final stage is the extrapolation stage, the base measurement surfaces of a camera module type determined in the first stage are extrapolated and modified with the module-specific Bezier correction surface and calibration data of the second stage. The output surfaces of this third and final stage are used to correct for the shading profile in the camera module, depending on the light-source estimation.

Abstract translation: 本发明的实施例涉及使用模块特定校准来执行自动透镜阴影校正的方法和系统。 根据本发明的一个方面，提供一种在三个主要阶段执行的方法。 在第一阶段期间，确定对于要校准类型的相机模块是共同的径向对称分量数据。 在第二阶段期间，执行一个或多个特定相机模块的阴影轮廓的实际测量。 在第三阶段和最后阶段是外推阶段，第一阶段确定的摄像机模块类型的基本测量表面用第二阶段的模块特定贝塞尔校正曲面和校准数据进行外推和修改。 根据光源估计，第三和最后一级的输出表面用于校正摄像机模块中的阴影轮廓。