公开(公告)号：US20180109715A1

公开(公告)日：2018-04-19

申请号：US15296152

申请日：2016-10-18

Applicant: Texas Instruments Incorporated

Inventor： MAYANK MANGLA ,  SHASHANK DABRAL ,  PETER LABAZIEWICZ

IPC: H04N5/235 ,  H04N5/225 ,  G06T5/00 ,  G06T5/50

CPC classification number: H04N5/2355 ,  G06T5/50 ,  G06T2207/10144 ,  G06T2207/20208 ,  H04N5/2256 ,  H04N5/2354 ,  H04N5/2356 ,  H04N5/2357

Abstract: A method of WDR imaging. Exposure times (ETs) are set for first and second frames for an image sensor to avoid second frame saturating by setting a second ET>1/a PWM frequency applied to an LED illuminating a scene to generate second longer ET pixel data (PD). The first frame has first PD and a first ET

公开(公告)号：US20210281772A1

公开(公告)日：2021-09-09

申请号：US17330458

申请日：2021-05-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： SHASHANK DABRAL ,  GANG HUA ,  MAYANK MANGLA

IPC: H04N5/265 ,  H04N5/247 ,  G06T7/80 ,  H04N5/235 ,  H04N5/268 ,  G06T7/90 ,  H04N5/232 ,  H04N9/04 ,  H04N5/225

Abstract: A system on a chip (SoC) implementing dynamic grouping of multiple cameras in an image processing system is disclosed. The SoC includes an image signal processor (ISP) configured to receive a signal corresponding to an image from two or more cameras, dynamically group the cameras into groups based on a measured view brightness and/or color temperature observed by each of the cameras, and assign cameras with a group of the groups to a same exposure/gain setting. The SoC further includes a statistics engine configured to receive the image signals and statistics related to the image signals from the ISP and determine a measurement of image brightness and/or color temperature of each image based on the image signals for forwarding to the ISP.

公开(公告)号：US20190191106A1

公开(公告)日：2019-06-20

申请号：US16226085

申请日：2018-12-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： SHASHANK DABRAL ,  GANG HUA ,  MAYANK MANGLA

IPC: H04N5/265 ,  H04N5/247 ,  G06T7/80 ,  G06T7/90 ,  H04N5/235 ,  H04N5/268

CPC classification number: H04N5/265 ,  G06T7/80 ,  G06T7/90 ,  H04N5/2351 ,  H04N5/2352 ,  H04N5/247 ,  H04N5/268

Abstract: A system on a chip (SoC) implementing dynamic grouping of multiple cameras in an image processing system is disclosed. The SoC includes an image signal processor (ISP) configured to receive a signal corresponding to an image from two or more cameras, dynamically group the cameras into groups based on a measured view brightness and/or color temperature observed by each of the cameras, and assign cameras with a group of the groups to a same exposure/gain setting. The SoC further includes a statistics engine configured to receive the image signals and statistics related to the image signals from the ISP and determine a measurement of image brightness and/or color temperature of each image based on the image signals for forwarding to the ISP.

公开(公告)号：US20170221183A1

公开(公告)日：2017-08-03

申请号：US15183459

申请日：2016-06-15

Applicant: Texas Instruments Incorporated

Inventor： MIHIR NARENDRA MODY ,  SHASHANK DABRAL ,  JESSE GREGORY VILLARREAL, JR. ,  WILLIAM WALLACE ,  NIRAJ NANDAN

IPC: G06T5/00 ,  G06K9/46 ,  G06T5/20

CPC classification number: G06T5/002 ,  G06K9/4647 ,  G06T5/20 ,  G06T2200/28 ,  G06T2207/20004 ,  G06T2207/20021 ,  G06T2207/20028

Abstract: A method for filtering noise for imaging includes receiving an image frame having position and range data. A filter size divides the frame into filter windows for processing each of the filter windows. For the first pixel, a space to the center pixel and a range difference between this pixel and the center pixel is determined and used for choosing a selected weight from weights in a 2D weight LUT including weighting for space and range difference, a filtered range value is calculated by applying the selected 2D weight to the pixel, and the range, filtered range value and selected 2D weight are summed. The determining, choosing, calculating and summing are repeated for at least the second pixel. A total sum of contributions from the first and second pixel are divided by the sum of selected 2D weights to generate a final filtered range value for the center pixel.

公开(公告)号：US20210218877A1

公开(公告)日：2021-07-15

申请号：US17213286

申请日：2021-03-26

Applicant: Texas Instruments Incorporated

Inventor： MAYANK MANGLA ,  SHASHANK DABRAL ,  PETER LABAZIEWICZ

IPC: H04N5/235 ,  H04N5/225 ,  G06T5/50

Abstract: A method of WDR imaging. Exposure times (ETs) are set for first and second frames for an image sensor to avoid second frame saturating by setting a second ET>1/a PWM frequency applied to an LED illuminating a scene to generate second longer ET pixel data (PD). The first frame has first PD and a first ET

公开(公告)号：US20170223267A1

公开(公告)日：2017-08-03

申请号：US15183495

申请日：2016-06-15

Applicant: Texas Instruments Incorporated

Inventor： SHASHANK DABRAL ,  MIHIR NARENDRA MODY ,  GANG HUA ,  ANTHONY LELL ,  NIRAJ NANDAN

IPC: H04N5/232 ,  H04N5/355 ,  G06T5/00 ,  H04N9/04 ,  H04N5/265 ,  H04N5/235 ,  H04N5/367

CPC classification number: H04N5/23232 ,  G06T5/008 ,  G06T2207/20208 ,  H04N5/2353 ,  H04N5/2355 ,  H04N5/2356 ,  H04N5/265 ,  H04N5/35572 ,  H04N5/3675 ,  H04N9/045 ,  H04N2201/0084

Abstract: A signal processing chain implements wide dynamic range (WDR) multi-frame processing including receiving raw image signals from a WDR sensor including a plurality of frames including a first frame including first exposure time pixel data and a second frame including second exposure time pixel data. Statistics for camera control are generated including first statistics for the first pixel data and second statistics for the second pixel data. The first and second pixel data are merged using WDR merge algorithm in a WDR merge block which utilizes the first and second statistics to generate a raw higher bit width single frame image. The single frame image is post-processed in post-processing block using at least a defect pixel correction algorithm, and at least a portion of tone mapping is performed on the single frame image after the post-processing to provide an output toned mapped image.