公开(公告)号：US20170287150A1

公开(公告)日：2017-10-05

申请号：US15089134

申请日：2016-04-01

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Mathieu Thivin ,  Pierre-Francois Pugibet

IPC: G06T7/40 ,  G06T1/20 ,  G06T5/00

CPC classification number: G06T7/90 ,  G06T3/4015 ,  G06T5/002 ,  G06T7/408 ,  G06T2207/10024 ,  H04N1/60

Abstract: Digital image processing circuitry converts a macro-pixel of an image in a color filter array (CFA) color space to a macro-pixel in a luminance-chrominance (YUV) color space. Chrominance filtering is applied to chrominance components of the converted macro-pixel in the YUV color space, generating a filtered macro-pixel in the YUV color space. The filtered macro-pixel in the YUV color space is converted into a filtered macro-pixel in the CFA color space.

公开(公告)号：US20170287149A1

公开(公告)日：2017-10-05

申请号：US15088934

申请日：2016-04-01

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Mathieu Thivin ,  Grégory Roffet

IPC: G06T7/40 ,  H04N9/04

CPC classification number: H04N9/04 ,  H04N9/045 ,  H04N9/67

Abstract: Tone mapping is performed by digital image processing circuitry on a macro-pixel basis. A luminance value of a macro-pixel of a digital image in a color space is determined. The macro-pixel includes a plurality of individual pixels. Respective tone-mapping gain values of each pixel of the macro-pixel are determined based on the determined luminance value of the macro-pixel. The determined tone-mapping gains are applied to the respective pixels of the macro-pixel. The color space may be a CFA color space, such as a Bayer color space.