Rajasekhar R Allu

US Patent:

20220263979, Aug 18, 2022

Filed:

May 9, 2022

Appl. No.:

17/739291

Inventors:

- Dallas TX, US
Mihir Narendra MODY - Bangalore, IN
Rajasekhar Reddy ALLU - Plano TX, US
Niraj NANDAN - Plano TX, US
Shashank DABRAL - Allen TX, US

International Classification:

H04N 5/217
H04N 9/04
H04N 5/357

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.

US Patent:

20230086775, Mar 23, 2023

Filed:

Dec 1, 2022

Appl. No.:

18/072813

Inventors:

- Dallas TX, US
Shashank DABRAL - Allen TX, US
Rajasekhar ALLU - Plano TX, US
Niraj NANDAN - Plano TX, US

International Classification:

H04N 9/04
G06T 1/20
H04N 9/67

Abstract:

An image signal processor includes a first matrix processing circuit, a post processing circuit, a second matrix processing circuit, and a split visual and analytics circuit. The first matrix processing circuit is configured to receive a plurality of component images generated based on an image captured by an image sensor and generate a plurality of first matrix outputs based on the plurality of component images. The post processing circuit is configured to perform color conversion on the plurality of first matrix outputs to generate a first luminance component of the image and a chrominance component of the image. The second matrix processing circuit is configured to perform color conversion on the plurality of first matrix outputs to generate a second luminance component of the image and a saturation component of the image. The split visual and analytics circuit is configured to generate visual and analytic data of the image.

US Patent:

20210326050, Oct 21, 2021

Filed:

Apr 16, 2021

Appl. No.:

17/233361

Inventors:

- Dallas TX, US
Niraj NANDAN - Plano TX, US
Rajasekhar Reddy ALLU - Plano TX, US

International Classification:

G06F 3/06
G06F 13/28

Abstract:

An integrated circuit includes: a local memory; and a first processing circuit coupled to the local memory. The first processing component is configured to: receive a first set of image data; perform a first image processing operation on the first set of image data to produce a second set of image data; and store at least some of the second set of image data into the local memory. The integrated circuit also includes a second processing circuit coupled to the local memory and configured to: receive at least some of the second set of image data from the local memory; and perform a second image processing operation on the second set of image data to produce a third set of image data.

US Patent:

20210209041, Jul 8, 2021

Filed:

Dec 31, 2020

Appl. No.:

17/139970

Inventors:

- Dallas TX, US
Rajasekhar Reddy Allu - Plano TX, US
Brian Chae - Duluth GA, US
Mihir Mody - Bangalore, IN

International Classification:

G06F 13/28
G06F 9/48
G06F 13/40
G06F 13/16

Abstract:

Methods, apparatus, systems, and articles of manufacture are disclosed herein to enable data aggregation and pattern adaptation in hardware acceleration subsystems. In some examples, a hardware acceleration subsystem includes a first scheduler, a first hardware accelerator coupled to the first scheduler to process at least a first data element and a second data element, and a first load store engine coupled to the first hardware accelerator, the first load store engine configured to communicate with the first scheduler at a superblock level by sending a done signal to the first scheduler in response to determining that a block count is equal to a first BPR value and aggregate the first data element and the second data element based on the first BPR value to generate a first aggregated data element.

US Patent:

20210209722, Jul 8, 2021

Filed:

Jun 23, 2020

Appl. No.:

16/909710

Inventors:

- Dallas TX, US
Rajasekhar Reddy ALLU - Plano TX, US
Mihir Narendra MODY - Bengaluru, IN

International Classification:

G06T 1/60
G06F 9/50
G06F 9/54

Abstract:

A lens distortion correction function operates by backmapping output images to the uncorrected, distorted input images. As a vision image processor completes processing on the image data lines needed for the lens distortion correction function to operate on a group of output, undistorted image lines, the lens distortion correction function begins processing the image data. This improves image processing pipeline delays by overlapping the operations. The vision image processor provides output image data to a circular buffer in SRAM, rather than providing it to DRAM. The lens distortion correction function operates from the image data in the circular buffer. By operating from the SRAM circular buffer, access to the DRAM for the highly fragmented backmapping image data read operations is removed, improving available DRAM bandwidth. By using a circular buffer, less space is needed in the SRAM. The improved memory operations further improve the image processing pipeline delays.

US Patent:

20210209737, Jul 8, 2021

Filed:

Dec 11, 2020

Appl. No.:

17/119714

Inventors:

- Dallas TX, US
Rajasekhar Reddy Allu - Plano TX, US
Niraj Nandan - Plano TX, US
Mihir Narendra Mody - Bangalore, IN

International Classification:

G06T 5/00
G06T 7/60
G06T 3/00
G06T 11/40

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.

US Patent:

20200396356, Dec 17, 2020

Filed:

Jun 14, 2019

Appl. No.:

16/442137

Inventors:

- Dallas TX, US
Mihir Narendra MODY - Bangalore, IN
Rajasekhar Reddy ALLU - Plano TX, US
Niraj NANDAN - Plano TX, US
Shashank DABRAL - Allen TX, US

International Classification:

H04N 5/217
H04N 5/357
H04N 9/04

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.

US Patent:

20200389581, Dec 10, 2020

Filed:

Aug 24, 2020

Appl. No.:

17/001398

Inventors:

- Dallas TX, US
Rajasekhar Reddy Allu - Plano TX, US

International Classification:

H04N 5/235
H04N 5/217
H04N 5/265
H04N 9/73

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.