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1.发明申请公开(公告)号：US20250080868A1
公开(公告)日：2025-03-06
申请号：US18954910
申请日：2024-11-21
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.
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公开(公告)号：US20240214511A1
公开(公告)日：2024-06-27
申请号：US18599324
申请日：2024-03-08
Applicant: Texas Instruments Incorporated
Inventor： Mihir Narendra MODY , Brijesh JADAV , Gang HUA , Niraj NANDAN , Rajasekhar Reddy ALLU , Ankur ANKUR , Mayank MANGLA
CPC classification number: H04N5/2628 , G06T3/40 , G06T7/12 , G06T7/60 , G06T11/00
Abstract: A technique for determining regions and block sizes for configuring a perspective transformation engine including determining a set of scale ratios for images captured by a camera, generating a scale ratio image based on the set of scale ratios, determining a set of boundary ranges for the scale ratio image, generating a binary scale ratio image using the set of scale ratios of the scale ratio image, determining a set of regions based on the set of boundary ranges for the binary scale ratio image, determining a block size for each region of the determined set of regions, and outputting the determined set of regions and the determined block sizes.
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公开(公告)号：US20230169689A1
公开(公告)日：2023-06-01
申请号：US17538268
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
CPC classification number: G06T7/90 , G06T1/20 , G06T2207/20208 , G06T2207/10024
Abstract: Techniques for image processing including receiving input image data, wherein the input image data includes data associated with a clear color channel, receiving a color offset value associated with a color channel, wherein color values for the color channel are not provided in the input image data, based on the color offset value, generating intermediate estimated color values for the color channel, wherein generating the intermediate estimated color values includes: clipping color values that have a magnitude greater than the color offset value, and adjusting color values that have a magnitude less than the color offset value based on the color offset value, applying a color correction function to the intermediate estimated color values based on the color offset value to determine color corrected estimated color values, and outputting the color corrected estimated color values.
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公开(公告)号：US20210027422A1
公开(公告)日：2021-01-28
申请号：US16911579
申请日：2020-06-25
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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5.发明公开公开(公告)号：US20230336887A1
公开(公告)日：2023-10-19
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 , G06T3/40 , G06T1/60 , H04N25/13
CPC classification number: H04N25/611 , G06T3/4015 , G06T1/60 , 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.
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Patent Agency Ranking
公开(公告)号：US20170161873A1
公开(公告)日：2017-06-08
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
CPC classification number: G06T3/4015 , G06T3/403 , G06T2207/20012 , H04N9/045 , 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：US20220408064A1
公开(公告)日：2022-12-22
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
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：US20220263979A1
公开(公告)日：2022-08-18
申请号：US17739291
申请日：2022-05-09
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：US20250054192A1
公开(公告)日：2025-02-13
申请号：US18929419
申请日：2024-10-28
Applicant: Texas Instruments Incorporated
Inventor： Gang HUA , Mihir Narendra MODY , Niraj NANDAN , Shashank DABRAL , Rajasekhar Reddy ALLU , Denis Roland BEAUDOIN
Abstract: Techniques for image processing including receiving input image data, wherein the input image data includes data associated with a clear color channel, receiving a color offset value associated with a color channel, wherein color values for the color channel are not provided in the input image data, based on the color offset value, generating intermediate estimated color values for the color channel, wherein generating the intermediate estimated color values includes: clipping color values that have a magnitude greater than the color offset value, and adjusting color values that have a magnitude less than the color offset value based on the color offset value, applying a color correction function to the intermediate estimated color values based on the color offset value to determine color corrected estimated color values, and outputting the color corrected estimated color values.
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公开(公告)号：US20250030951A1
公开(公告)日：2025-01-23
申请号：US18909023
申请日：2024-10-08
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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