公开(公告)号：US20210209737A1

公开(公告)日：2021-07-08

申请号：US17119714

申请日：2020-12-11

Applicant: Texas Instruments Incorporated

Inventor： Gang Hua ,  Rajasekhar Reddy Allu ,  Niraj Nandan ,  Mihir Narendra Mody

IPC: G06T5/00 ,  G06T7/60 ,  G06T3/00 ,  G06T11/40

Abstract: A method for error handling in a geometric correction engine (GCE) is provided that includes receiving configuration parameters by the GCE, generating, by the GCE in accordance with the configuration parameters, output blocks of an output frame based on corresponding blocks of an input frame, detecting, by the GCE, a run-time error during the generating, and reporting, by the GCE, an event corresponding to the run-time error.

公开(公告)号：US20210042891A1

公开(公告)日：2021-02-11

申请号：US17080884

申请日：2020-10-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rajasekhar Reddy Allu ,  Niraj Nandan ,  Mihir Narendra Mody ,  Gang Hua ,  Brian Okchon Chae ,  Shashank Dabral ,  Hetul Sanghvi ,  Vikram VijayanBabu Appia ,  Sujith Shivalingappa

IPC: G06T5/00 ,  G06T3/00

Abstract: A method for geometrically correcting a distorted input frame and generating an undistorted output frame includes capturing and storing an input frame in an external memory, allocating an output frame with an output frame size and dividing the output frame into output blocks, computing a size of the input blocks in the input image corresponding to each output blocks, checking if the size of the input blocks is less than the size of the internal memory and if not dividing until the required input block size of divided sub blocks is less than the size of the internal memory, programming an apparatus with input parameters, fetching the input blocks into an internal memory, processing each of the divided sub blocks sequentially and processing the next output block in step until all the output blocks are processed; and composing the output frame for each of the blocks in the output frame.

公开(公告)号：US10853923B2

公开(公告)日：2020-12-01

申请号：US15927820

申请日：2018-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rajasekhar Reddy Allu ,  Niraj Nandan ,  Mihir Narendra Mody ,  Gang Hua ,  Brian Okchon Chae ,  Shashank Dabral ,  Hetul Sanghvi ,  Vikram VijayanBabu Appia ,  Sujith Shivalingappa

IPC: G06T5/00 ,  G06T3/00

Abstract: A method for geometrically correcting a distorted input frame and generating an undistorted output frame includes capturing and storing an input frame in an external memory, allocating an output frame with an output frame size and dividing the output frame into output blocks, computing a size of the input blocks in the input image corresponding to each output blocks, checking if the size of the input blocks is less than the size of the internal memory and if not dividing until the required input block size of divided sub blocks is less than the size of the internal memory, programming an apparatus with input parameters, fetching the input blocks into an internal memory, processing each of the divided sub blocks sequentially and processing the next output block in step until all the output blocks are processed; and composing the output frame for each of the blocks in the output frame.

公开(公告)号：US20190096041A1

公开(公告)日：2019-03-28

申请号：US15714862

申请日：2017-09-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rajasekhar Reddy Allu ,  Niraj Nandan ,  Mihir Narendra Mody ,  Gang Hua ,  Brian Okchon Chae ,  Shashank Dabral ,  Hetul Sanghvi ,  Vikram VijayanBabu Appia ,  Sujith Shivalingappa

IPC: G06T5/00 ,  G06T3/00 ,  G06T5/40 ,  G06T3/40 ,  G06T7/11 ,  G06T5/20

Abstract: An apparatus and method for geometrically correcting a distorted input frame and generating an undistorted output frame. The apparatus includes an external memory block that stores the input frame, a counter block to compute output coordinates of the output frame for a region based on a block size of the region, a back mapping block to generate input coordinates corresponding to each of the output coordinates, a bounding module to compute input blocks corresponding to each of the input coordinates, a buffer module to fetch data corresponding to each of the input blocks, an interpolation module to interpolate data from the buffer module and a display module that receives the interpolated data for each of the regions and stitch an output image. The method includes determining the size of the output block based on a magnification data.

公开(公告)号：US20140092989A1

公开(公告)日：2014-04-03

申请号：US13632636

申请日：2012-10-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jian WANG ,  Thanh Thien Tran ,  Gang Hua ,  Ivan Garcia

IPC: H04N7/26

CPC classification number: H04N19/88 ,  H04N19/186 ,  H04N19/40 ,  H04N19/46

Abstract: A video system includes a first video device. The first video device includes a video output port and an arbitrary data scrambler. The first video device transmits a video stream through the video output port. The video output port is configured to insert video timing reference values into the video stream. The arbitrary data scrambler is configured to scramble non-video data for transmission in the video stream such that unscrambled non-video data containing video timing reference values is transformed, without information loss, to scrambled non-video data containing no video timing reference values.

Abstract translation: 视频系统包括第一视频设备。 第一视频设备包括视频输出端口和任意数据加扰器。 第一视频设备通过视频输出端口发送视频流。 视频输出端口被配置为将视频定时参考值插入到视频流中。 任意数据扰频器被配置为对非视频数据进行扰频，以便在视频流中进行传输，使得包含视频定时参考值的未加扰的非视频数据在没有信息丢失的情况下被变换到不包含视频定时参考值的加扰的非视频数据。

公开(公告)号：US12302007B2

公开(公告)日：2025-05-13

申请号：US18147964

申请日：2022-12-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Hrushikesh Garud ,  Rajasekhar Allu ,  Gang Hua ,  Jing-Fei Ren ,  Mayank Mangla ,  Niraj Nandan ,  Mihir Mody ,  Pandy Kalimuthu

IPC: H04N23/76 ,  H04N23/11 ,  H04N23/667 ,  H04N23/81 ,  H04N23/84

Abstract: A system is provided. The system generally includes a first processor configured to receive image input data from a red-green-blue infrared (RGBIR) sensor. The first processor of the system is configured to generate a first intermediate image data from the image input data. The system generally includes a second processor. The second processor of the system is configured to generate a second intermediate image data that includes red-green-blue (RGB) image data from the first intermediate image data, and to generate a third intermediate image data that includes infrared (IR) image data from the first intermediate image data. The system generally includes a third processor. The third processor of the system is configured to process the third intermediate image data. The system generally includes a fourth processor. The fourth processor of the system is configured to process the second image data.

公开(公告)号：US20250030952A1

公开(公告)日：2025-01-23

申请号：US18908046

申请日：2024-10-07

Applicant: Texas Instruments Incorporated

Inventor： Gang Hua ,  Shashank Dabral ,  Mihir Narendra Mody ,  Rajasekhar Reddy Allu ,  Niraj Nandan

IPC: H04N23/88 ,  H04N9/78 ,  H04N23/71 ,  H04N23/741 ,  H04N23/76

Abstract: Local automatic white balance (AWB) of wide dynamic range (WDR) images is provided. Methods and systems include collecting, by an image signal processor (ISP), statistics for local AWB from at least one wide dynamic range (WDR) image received by the ISP; generating, by a processor, based on the statistics, local gain lookup tables (LUTs), one for each color channel represented in the WDR image(s), each local gain LUT providing a correlation between gain and intensity; and storing the local gain LUTs. Further processing includes, for each of multiple pixels of a WDR image to be output calculating an intensity value, accessing the local gain LUT for the color channel corresponding to that pixel using the calculated intensity value to identify a corresponding local gain value, and applying the local gain value to that pixel.

公开(公告)号：US12192653B2

公开(公告)日：2025-01-07

申请号：US18343018

申请日：2023-06-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Gang Hua ,  Rajasekhar Reddy Allu ,  Mihir Narendra Mody ,  Niraj Nandan ,  Mayank Mangla ,  Pandy Kalimuthu

IPC: H04N25/611 ,  G06T1/60 ,  G06T3/4015 ,  H04N25/13

Abstract: In an advanced driver-assistance system (ADAS), RAW sensor image processing for a machine vision (MV) application is important. Due to different color, e.g., red/green/blue (RGB), color components, being focused by the lens at different locations in image plane, the lateral chromatic aberration phenomenon may sometimes be observed, which causes false color around edges in the final image output, especially for high contrast edges, which can impede MV applications. Disclosed herein are low-latency, efficient, optimized designs for chromatic aberration correction (CAC) components. An in-pipeline CAC design may be used to perform on-the-fly CAC without any out-of-pipeline memory traffic; enable use of wide dynamic range (WDR) sensors; uses bicubic interpolation; support vertical and horizontal chromatic aberration color channel offsets, reduce CAC line memory requirements, and support flexible look-up table (LUT) down-sampling factors to improve the spatial precision of correction and accommodate popular image sensor resolutions.

公开(公告)号：US12143733B2

公开(公告)日：2024-11-12

申请号：US18194762

申请日：2023-04-03

Applicant: Texas Instruments Incorporated

Inventor： Gang Hua ,  Shashank Dabral ,  Mihir Narendra Mody ,  Rajasekhar Reddy Allu ,  Niraj Nandan

IPC: H04N23/88 ,  H04N9/78 ,  H04N23/71 ,  H04N23/741 ,  H04N23/76

Abstract: Local automatic white balance (AWB) of wide dynamic range (WDR) images is provided. Methods and systems include collecting, by an image signal processor (ISP), statistics for local AWB from at least one wide dynamic range (WDR) image received by the ISP; generating, by a processor, based on the statistics, local gain lookup tables (LUTs), one for each color channel represented in the WDR image(s), each local gain LUT providing a correlation between gain and intensity; and storing the local gain LUTs. Further processing includes, for each of multiple pixels of a WDR image to be output calculating an intensity value, accessing the local gain LUT for the color channel corresponding to that pixel using the calculated intensity value to identify a corresponding local gain value, and applying the local gain value to that pixel.

公开(公告)号：US20240196098A1

公开(公告)日：2024-06-13

申请号：US18584349

申请日：2024-02-22

Applicant: Texas Instruments Incorporated

Inventor： Gunawath Dilshan Godaliyadda ,  Mayank Mangla ,  Gang Hua

IPC: H04N23/71 ,  H04N23/73

CPC classification number: H04N23/71 ,  H04N23/73

Abstract: A method for automatic exposure (AE) control is provided that includes receiving statistics for AE control for an image from an image signal processor (ISP) coupled to an image sensor generating the image, computing an exposure value at a current time t (EV(t)) using a cost function based on target characteristics of an image, wherein computation of the cost function uses the statistics, and computing AE settings for the image sensor based on EV(t).