公开(公告)号：US11743438B1

公开(公告)日：2023-08-29

申请号：US17656359

申请日：2022-03-24

Applicant: Connaught Electronics Ltd.

Inventor： Mark Patrick Griffin ,  Brian Michael Thomas Deegan

IPC: H04N9/64 ,  G06T7/90 ,  H04N5/265 ,  H04N5/262 ,  G06T5/50 ,  G06V20/56

CPC classification number: H04N9/646 ,  G06T5/50 ,  G06T7/90 ,  G06V20/588 ,  H04N5/265 ,  H04N5/2624 ,  G06T2207/10024 ,  G06T2207/20212 ,  G06T2207/30252

Abstract: A method for reducing a color shift of image pixels of an image for a motor vehicle captured by a camera, a computer program product and a control device for the vehicle are disclosed. For the respective image pixel of the image, the method involves determining a color information, which describes a color of the image pixel, checking whether the determined color information is larger than a minimum color information and smaller than a maximum color information, wherein the minimum and maximum color information delimit a color information range, in which reference image pixels describing a reference object sway. When the checking is successful, calculating a corrected color information in consideration of the determined color information and a correction factor and providing the calculated corrected color information instead of the determined color information, wherein the corrected color information in comparison to the determined color information has a reduced color shift.

公开(公告)号：US10769762B2

公开(公告)日：2020-09-08

申请号：US15515801

申请日：2015-10-02

Applicant: Connaught Electronics Ltd.

Inventor： Mark Patrick Griffin

IPC: G06T5/00 ,  H04N5/235 ,  B60R1/00 ,  G06T5/40 ,  H04N5/238 ,  H04N5/243 ,  H04N9/04 ,  H04N9/73

Abstract: A camera device for a motor vehicle includes an image sensor to provide a raw image (R) of an environment of the camera device. Additionally, an image processing device generates an output image (I) from the raw image (R) by means of a spreading function of a histogram spreading. The spreading function generates from a respective input pixel value (Li) of each pixel of the raw image (R) each one output pixel value (Lo) of a corresponding pixel of the output image (I). Furthermore, the histogram spreading may be adapted to the capturing situation. At least one parameter value (S, G) of the camera device depending on a brightness (B1, B2) of the environment is acquired and a limit value (L) for the output pixel values (Lo) is set in the spreading function depending on the at least one acquired parameter value (S, G).

公开(公告)号：US20170243337A1

公开(公告)日：2017-08-24

申请号：US15515801

申请日：2015-10-02

Applicant: Connaught Electronics Ltd.

Inventor： Mark Patrick Griffin

IPC: G06T5/00 ,  H04N5/235 ,  B60R1/00 ,  H04N5/238 ,  H04N9/04 ,  H04N9/73 ,  G06T5/40 ,  H04N5/243

Abstract: The invention relates to methods for operating a camera device (4) for a motor vehicle (3). An image sensor (5) of the camera device (4) provides a raw image (R) of an environment (8) of the camera device (4). An image processing device (6) generates an output image (I) from the raw image (R) by means of a spreading function (13) of a histogram spreading (12). The spreading function (13) generates from a respective input pixel value (Li) of each pixel of the raw image (R) each one output pixel value (Lo) of a corresponding pixel of the output image (I). It is the object of the invention to adapt the histogram spreading (12) to the capturing situation. At least one parameter value (S, G) of the camera device (4) depending on a brightness (B1, B2) of the environment (8) is acquired and a limit value (L) for the output pixel values (Lo) is set in the spreading function (13) depending on the at least one acquired parameter value (S, G).