公开(公告)号：US20230291864A1

公开(公告)日：2023-09-14

申请号：US17690829

申请日：2022-03-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mihir Narendra MODY ,  Brijesh JADAV ,  Gang HUA ,  Niraj NANDAN ,  Rajasekhar Reddy ALLU ,  Ankur ANKUR ,  Mayank MANGLA

IPC: H04N5/262 ,  G06T3/40 ,  G06T7/12 ,  G06T7/60 ,  G06T11/00

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.

公开(公告)号：US20230199339A1

公开(公告)日：2023-06-22

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: H04N9/04 ,  G06T1/60 ,  G06T3/40

CPC classification number: H04N9/04517 ,  G06T1/60 ,  G06T3/4015 ,  H04N9/04551

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：US20230171512A1

公开(公告)日：2023-06-01

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: H04N9/04 ,  H04N9/67 ,  H04N9/68

CPC classification number: H04N9/04515 ,  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.