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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
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.
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2.发明授权公开(公告)号：US11895326B2
公开(公告)日：2024-02-06
申请号：US18079237
申请日：2022-12-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aishwarya Dubey , Shashank Dabral , Veeramanikandan Raju
IPC: H04N19/557 , H04N19/577 , H04N19/567 , G01S17/89 , G01S17/86
CPC classification number: H04N19/557 , G01S17/86 , G01S17/89 , H04N19/567 , H04N19/577
Abstract: Frames from an image stream or streams are processed by independently operating digital signal processors (DSPs), with only frame checking microprocessors operating in a lockstep mode. In one example, two DSP are operating on alternate frames. Each DSP processes the frames and produces prediction values for the next frame. The lockstep microprocessors develop their own next frame prediction. The lockstep processors compare issued frames and previously developed predicted frames for consistency. If the predictions are close enough, the issued frame passes the test. The lockstep processors then compare the issued frame to the preceding two frames for a similar consistency check. If the prior frames are also close enough, the issued frame is acceptable. In another example, hardware checkers are provided to compare the present frame with a larger number of prior frames. The hardware checkers provide comparison results to the lockstep processors to compare against allowable variation limits.
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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
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.
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公开(公告)号：US11637961B2
公开(公告)日：2023-04-25
申请号：US17825635
申请日：2022-05-26
Applicant: Texas Instruments Incorporated
Inventor： Shashank Dabral , Rajasekhar Reddy Allu
Abstract: Disclosed examples include integrated circuits, merge circuits and methods of processing multiple-exposure image data, in which a single pre-processing circuit is used for pre-processing first input exposure data associated with a first exposure of the image, and then for pre-processing second input exposure data associated with a second exposure of the image, and the first and second pre-processed exposure data are merged to generate merged image data for tone mapping and other post-processing. An example merge circuit includes a configurable gain circuit to apply a gain to the first and/or second exposure data, as well as a configurable weighting circuit with a weight calculation circuit and a motion adaptive filter circuit to compute a first and second weight values for merging the pre-processed first and second exposure data.
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公开(公告)号：US20220294960A1
公开(公告)日：2022-09-15
申请号：US17825635
申请日：2022-05-26
Applicant: Texas Instruments Incorporated
Inventor： Shashank Dabral , Rajasekhar Reddy Allu
Abstract: Disclosed examples include integrated circuits, merge circuits and methods of processing multiple-exposure image data, in which a single pre-processing circuit is used for pre-processing first input exposure data associated with a first exposure of the image, and then for pre-processing second input exposure data associated with a second exposure of the image, and the first and second pre-processed exposure data are merged to generate merged image data for tone mapping and other post-processing. An example merge circuit includes a configurable gain circuit to apply a gain to the first and/or second exposure data, as well as a configurable weighting circuit with a weight calculation circuit and a motion adaptive filter circuit to compute a first and second weight values for merging the pre-processed first and second exposure data.
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Patent Agency Ranking
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
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.
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公开(公告)号：US11140364B2
公开(公告)日：2021-10-05
申请号：US16690906
申请日：2019-11-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Shashank Dabral , Aishwarya Dubey , Martin Fritz Mueller
Abstract: Techniques including obtaining a first location of a vehicle, the vehicle having one or more cameras disposed about the vehicle, and wherein each camera is associated with a physical camera pose indicating where each camera is located with respect to the vehicle, capturing, by a first camera, a first image of a first area, associating the first image with the first location of the vehicle when the first image was captured, moving the vehicle in a direction so that the first area is no longer within a field of view of the first camera, obtaining a second location of the vehicle, determining a temporal camera pose based on the physical camera pose of the first camera and the second location of the vehicle, and rendering a view of the first area based on the temporal camera pose and the first image.
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公开(公告)号：US20210027522A1
公开(公告)日：2021-01-28
申请号：US16519099
申请日：2019-07-23
Applicant: Texas Instruments Incorporated
Inventor： Shashank Dabral , Vikram Appia , Hemant Hariyani , Lucas Weaver
Abstract: A system on a chip (SoC) includes a digital signal processor (DSP) and a graphics processing unit (GPU) coupled to the DSP. The DSP is configured to receive a stream of received depth measurements and generate a virtual bowl surface based on the stream of received depth measurements. The DSP is also configured to generate a bowl to physical camera mapping based on the virtual bowl surface. The GPU is configured to receive a first texture and receive a second texture. The GPU is also configured to perform physical camera to virtual camera transformation on the first texture and on the second texture, based on the bowl to physical camera mapping, to generate an output image.
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公开(公告)号：US10757339B2
公开(公告)日：2020-08-25
申请号：US16208313
申请日：2018-12-03
Applicant: Texas Instruments Incorporated
Inventor： Shashank Dabral , Rajasekhar Reddy Allu
Abstract: Disclosed examples include integrated circuits, merge circuits and methods of processing multiple-exposure image data, in which a single pre-processing circuit is used for pre-processing first input exposure data associated with a first exposure of the image, and then for pre-processing second input exposure data associated with a second exposure of the image, and the first and second pre-processed exposure data are merged to generate merged image data for tone mapping and other post-processing. An example merge circuit includes a configurable gain circuit to apply a gain to the first and/or second exposure data, as well as a configurable weighting circuit with a weight calculation circuit and a motion adaptive filter circuit to compute a first and second weight values for merging the pre-processed first and second exposure data.
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10.发明授权公开(公告)号：US10523865B2
公开(公告)日：2019-12-31
申请号：US15298214
申请日：2016-10-19
Applicant: Texas Instruments Incorporated
Inventor： Vikram VijayanBabu Appia , Sujith Shivalingappa , Brijesh Rameshbhai Jadav , Hemant Hariyani , Shashank Dabral , Mayank Mangla
IPC: H04N9/47 , H04N7/18 , H04N5/232 , G06T3/00 , H04N5/247 , G06T15/20 , G06T15/06 , B60R1/00 , H04N5/357 , H04N9/04
Abstract: A method for displaying a surround view on a single display screen is disclosed. A plurality of image frames for a particular time may be received from a corresponding plurality of cameras. A viewpoint warp map corresponding to a predetermined first virtual viewpoint may be selected, wherein the viewpoint warp map defines a source pixel location in the plurality of image frames for each output pixel location in the display screen. The warp map was predetermined offline and stored for later use. An output image is synthesized for the display screen by selecting pixel data for each pixel of the output image from the plurality of image frames in accordance with the viewpoint warp map. The synthesized image is then displayed on a display screen.
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