公开(公告)号：US12143729B2

公开(公告)日：2024-11-12

申请号：US17538833

申请日：2021-11-30

Applicant: Texas Instruments Incorporated

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

IPC: H04N23/84 ,  H04N9/67 ,  H04N9/68

Abstract: A technique for image processing, comprising: receiving input image data, wherein the image data is companded into a first bit depth, wherein the image data includes incomplete color values for pixels of the image data, and wherein the image data is associated with a first color space, interpolating the image data to generate color values for the incomplete color values for pixels of the image data, expanding the image data from the first bit depth to a second bit depth, wherein the color values of the expanded image data have a linear dynamic range, and wherein the second bit depth is higher than the first bit depth, converting the color values for pixels of the expanded image data from the first color space to a second color space, and compressing the color values for pixels of the image data to a third bit depth, the third bit depth lower than the second bit depth, and wherein the compressed color values have a nonlinear dynamic range.

公开(公告)号：US20240040266A1

公开(公告)日：2024-02-01

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 ,  H04N23/84 ,  H04N23/81

CPC classification number: H04N23/76 ,  H04N23/11 ,  H04N23/843 ,  H04N23/81 ,  H04N23/667

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：US11743612B2

公开(公告)日：2023-08-29

申请号：US17555145

申请日：2021-12-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04N25/611 ,  G06T3/40 ,  G06T1/60 ,  H04N25/13

CPC classification number: H04N25/611 ,  G06T1/60 ,  G06T3/4015 ,  H04N25/13

Abstract: In the advanced driver-assistance systems (ADAS) field, RAW sensor image processing for machine vision (MV) applications can be of critical importance. Due to red/green/blue (RGB) image components being focused by the lens at different locations in image plane, the lateral chromatic aberration (LCA) 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) modules. In some embodiments, an in-pipeline CAC design is used that: is configured to perform on-the-fly CAC without any out-of-pipeline memory traffic; enables use of wide dynamic range (WDR) sensors; uses bicubic interpolation; supports vertical and horizontal chromatic aberration red/blue color channel offsets, reduces CAC line memory requirements, and supports 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：US11653105B2

公开(公告)日：2023-05-16

申请号：US17110139

申请日：2020-12-02

Applicant: Texas Instruments Incorporated

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

IPC: H04N23/88 ,  H04N23/74 ,  H04N23/71 ,  H04N9/78 ,  H04N23/76 ,  H04N23/741

CPC classification number: H04N23/88 ,  H04N9/78 ,  H04N23/71 ,  H04N23/741 ,  H04N23/76

Abstract: A method for local automatic white balance (AWB) of wide dynamic range (WDR) images is provided that includes collecting statistics for local AWB by an image signal processor (ISP) from a first WDR image generated by the ISP, receiving, by the ISP, a plurality of local gain lookup tables (LUTs), one for each color channel, wherein the plurality of local gain LUTs is generated using the statistics, and applying, by the ISP, a gain value to each pixel in a second WDR image generated by the ISP, wherein the gain value for the pixel is determined by the ISP using the local gain LUT for the color channel of the pixel.

公开(公告)号：US11330153B2

公开(公告)日：2022-05-10

申请号：US16442137

申请日：2019-06-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04N5/357 ,  H04N5/217 ,  H04N9/04

Abstract: In some examples, a method comprises receiving pixel data from an image capture device having a color filter, wherein the pixel data represents a portion of an image. The method further includes performing wavelet decomposition on the pixel data to produce decomposed pixel data and determining a local intensity of the pixel data. The method also includes determining a noise threshold value based on the local intensity and a noise intensity function that is based on the color filter; determining a noise value for the pixel data based on the decomposed pixel data and the noise threshold value; and correcting the pixel data based on the noise value to produce an output image.

公开(公告)号：US12244979B2

公开(公告)日：2025-03-04

申请号：US17983905

申请日：2022-11-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04N9/64 ,  G06T7/00 ,  G06T7/90

Abstract: Various embodiments disclosed herein relate to defective pixel detection and correction, and more specifically to using threshold functions based on color channels to compare pixel values to threshold values. A method is provided herein that comprises identifying a color channel of an image pixel in a frame and identifying a threshold function based at least on the color channel. The method further comprises applying the threshold function to one or more nearest-neighbor values to obtain a threshold value and determining whether a corresponding sensor pixel is defective based at least on a comparison of the image pixel to the threshold value.

公开(公告)号：US12244937B2

公开(公告)日：2025-03-04

申请号：US18309055

申请日：2023-04-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Hrushikesh Garud ,  Rajasekhar Allu ,  Gang Hua ,  Pandy Kalimuthu

IPC: H04N23/85 ,  H04N23/11 ,  H04N23/84 ,  H04N25/13 ,  H04N25/131

Abstract: Disclosed herein are improvements to pixel pattern conversion, upsampling, and IR decontamination processes. An example includes an image processing pipeline comprising an upstream component, a pattern conversion component downstream with respect to the upstream component in the image processing pipeline, and a downstream component relative to the pattern conversion component. The pattern conversion component is configured to obtain RGB-IR pixel data produced by the upstream component of the image processing pipeline and convert the RGB-IR pixel data into RGB pixel data and IR pixel data using a conversion engine. The conversion engine is configured to demosaic the RGB-IR pixel into the RGB pixel data and the IR pixel data, remosaic the RGB pixel data into an RGB pattern and the IR pixel data into an IR pattern and remove IR contamination from the RGB pixel data of the RGB pattern for use by the downstream component.

公开(公告)号：US20240054601A1

公开(公告)日：2024-02-15

申请号：US18383576

申请日：2023-10-25

Applicant: Texas Instruments Incorporated

Inventor： Shashank Dabral ,  Gang Hua ,  Mihir Narendra Mody

IPC: G06T3/40 ,  H04N5/33 ,  H01L27/146 ,  H04N25/13

CPC classification number: G06T3/4015 ,  H04N5/33 ,  H01L27/14649 ,  H01L27/14621 ,  H04N25/134 ,  H04N25/131

Abstract: A method for processing RGB-Infrared (RGB-IR) sensor data is provided that includes receiving a raw RGB-IR image, determining whether to process the raw RGB-IR image in day mode or night mode, generating, when day mode is determined, an infrared (IR) subtracted raw Bayer image from the raw RGB-IR image and processing the IR subtracted raw Bayer image in an image signal processor (ISP), and generating, when night mode is determined, an IR image from the raw RGB-IR image.

公开(公告)号：US11756169B2

公开(公告)日：2023-09-12

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 ,  G06T11/40 ,  G06T3/00

CPC classification number: G06T5/006 ,  G06T3/0093 ,  G06T7/60 ,  G06T11/40 ,  G06T2207/20021

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：US11700350B2

公开(公告)日：2023-07-11

申请号：US17330458

申请日：2021-05-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shashank Dabral ,  Gang Hua ,  Mayank Mangla

IPC: H04N5/265 ,  G06T7/80 ,  H04N5/268 ,  G06T7/90 ,  H04N23/10 ,  H04N23/45 ,  H04N23/60 ,  H04N23/71 ,  H04N23/90 ,  H04N23/698 ,  H04N23/72

CPC classification number: H04N5/265 ,  G06T7/80 ,  G06T7/90 ,  H04N5/268 ,  H04N23/10 ,  H04N23/45 ,  H04N23/60 ,  H04N23/698 ,  H04N23/71 ,  H04N23/90 ,  H04N23/72

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.