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公开(公告)号：US11949995B2
公开(公告)日：2024-04-02
申请号：US17895191
申请日：2022-08-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Shashank Dabral , Mihir Narendra Mody , Denis Beaudoin , Niraj Nandan , Gang Hua
IPC: H04N23/84 , G06T3/40 , G06T3/4015 , G06T3/403 , G06T5/00 , H04N25/13 , H04N25/131
CPC classification number: H04N23/843 , G06T3/4015 , G06T3/403 , G06T5/00 , G06T2207/20012 , G06T2207/20192 , H04N25/131 , H04N25/134 , H04N25/135 , H04N2209/046
Abstract: A method of de-mosaicing pixel data from an image processor includes generating a pixel block that includes a plurality of image pixels. The method also includes determining a first image gradient between a first set of pixels of the pixel block and a second image gradient between a second set of pixels of the pixel block. The method also includes determining a first adaptive threshold value based on intensity of a third set of pixels of the pixel block. The pixels of the third set of pixels are adjacent to one another. The method also includes filtering the pixel block in a vertical, horizontal, or neutral direction based on the first and second image gradients and the first adaptive threshold value utilizing a plurality of FIR filters to generate a plurality of component images.
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公开(公告)号：US11915442B2
公开(公告)日：2024-02-27
申请号：US17474489
申请日：2021-09-14
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
CPC classification number: G06T7/60 , G06T5/006 , G06T5/40 , G06T7/11 , G06T2207/10024 , G06T2207/20021
Abstract: An apparatus and method for geometrically correcting an arbitrary shaped input frame and generating an undistorted output frame. The method includes capturing arbitrary shaped input images with multiple optical devices and processing the images, identifying redundant blocks and valid blocks in each of the images, allocating an output frame with an output frame size and dividing the output frame into regions shaped as a rectangle, programming the apparatus and disabling processing for invalid blocks in each of the regions, fetching data corresponding to each of the valid blocks and storing in an internal memory, interpolating data for each of the regions with stitching and composing the valid blocks for the output frame and displaying the output frame on a display module.
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公开(公告)号：US20240040268A1
公开(公告)日：2024-02-01
申请号：US18309055
申请日：2023-04-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Hrushikesh Garud , Rajasekhar Allu , Gang Hua , Pandy Kalimuthu
CPC classification number: H04N23/85 , H04N23/843 , H04N23/11 , 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.
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公开(公告)号：US20230419462A1
公开(公告)日：2023-12-28
申请号：US18465250
申请日：2023-09-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Gang Hua , Rajasekhar Reddy Allu , Niraj Nandan , Mihir Narendra Mody
CPC classification number: G06T5/006 , G06T7/60 , G06T11/40 , G06T3/0093 , 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.
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公开(公告)号：US20220198604A1
公开(公告)日：2022-06-23
申请号：US17129818
申请日：2020-12-21
Applicant: Texas Instruments Incorporated
Inventor： Shashank Dabral , Gang Hua , Mihir Narendra Mody
IPC: G06T3/40 , H04N5/33 , H01L27/146 , H04N9/04
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.
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Patent Agency Ranking
公开(公告)号：US20220174249A1
公开(公告)日：2022-06-02
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
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.
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公开(公告)号：US10366471B2
公开(公告)日：2019-07-30
申请号：US15349609
申请日：2016-11-11
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Shashank Dabral , Mihir Narendra Mody , Denis Beaudoin , Niraj Nandan , Gang Hua
Abstract: A method of de-mosaicing pixel data from an image processor includes generating a pixel block that includes a plurality of image pixels. The method also includes determining a first image gradient between a first set of pixels of the pixel block and a second image gradient between a second set of pixels of the pixel block. The method also includes determining a first adaptive threshold value based on intensity of a third set of pixels of the pixel block. The pixels of the third set of pixels are adjacent to one another. The method also includes filtering the pixel block in a vertical, horizontal, or neutral direction based on the first and second image gradients and the first adaptive threshold value utilizing a plurality of FIR filters to generate a plurality of component images.
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公开(公告)号：US20190096077A1
公开(公告)日：2019-03-28
申请号：US15879281
申请日：2018-01-24
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
Abstract: An apparatus and method for geometrically correcting an arbitrary shaped input frame and generating an undistorted output frame. The method includes capturing arbitrary shaped input images with multiple optical devices and processing the images, identifying redundant blocks and valid blocks in each of the images, allocating an output frame with an output frame size and dividing the output frame into regions shaped as a rectangle, programming the apparatus and disabling processing for invalid blocks in each of the regions, fetching data corresponding to each of the valid blocks and storing in an internal memory, interpolating data for each of the regions with stitching and composing the valid blocks for the output frame and displaying the output frame on a display module.
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公开(公告)号：US20190096042A1
公开(公告)日：2019-03-28
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
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.
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公开(公告)号：US09871965B2
公开(公告)日：2018-01-16
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 , Rajashekhar Allu
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.
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