Patents by Inventor Brian Douglas Stewart
Brian Douglas Stewart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11803942Abstract: A method for enhancing an image and an image enhancement device are described. The method for enhancing an image including: capturing an initial image including a plurality of pixels, and performing a pixel-by-pixel dehazing operation for each of the plurality of pixels. The performing including: generating, for each of the plurality of pixels, a value for a blended gray image based on color channels of the pixel, generating, for each of the plurality of pixels, a value for a transmission map based on the blended gray image, and generating, for each of the plurality of pixels, output color channels for a processed image based on the value for the transmission map, the processed image being an enhancement of the initial image.Type: GrantFiled: November 19, 2021Date of Patent: October 31, 2023Assignee: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITEDInventors: Brian Douglas Stewart, Réka Hegedüs
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Patent number: 11756172Abstract: The present disclosure relates to a tone mapping method for a succession of images implemented by an image processing device. The method including a) the division of the images of the succession of images in a plurality of sub-blocks of first pixels; b) for a first image (INPUT_IMAGEf) of the succession of images, the creation of a first mini-image (MPICf) comprising pixels of the first mini-image, each pixel of the first mini-image representing a corresponding sub-block of the first image, the intensity of each pixel of the first mini-image being representative of the intensity of the first pixels of the corresponding sub-block; c) the storage of the first mini-image (MPICf) in a memory; and d) for a second image (INPUT_IMAGEf+1) of the succession of images, the modification of the second image according to the first mini-image (MPICf) in order to generate an output image.Type: GrantFiled: February 4, 2021Date of Patent: September 12, 2023Assignees: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, STMICROELECTRONICS SAInventors: Héloïse Eliane Geneviève Gresset, Brian Douglas Stewart
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Patent number: 11721031Abstract: A system and method for a scalable depth sensor. The scalable depth sensor having an emitter, a receiver, and a processor. The emitter is configured to uniformly illuminate a scene within a field-of-view of the emitter. The receiver including a plurality of detectors, each detector configured to capture depth and intensity information corresponding to a subset of the field-of-view. The a processor connected to the detector and configured to selectively sample a subset of the plurality of the detectors in accordance with compressive sensing techniques, and provide an image in accordance with an output from the subset of the plurality of the detectors, the image providing a depth and intensity image corresponding to the field-of-view of the emitter.Type: GrantFiled: October 28, 2020Date of Patent: August 8, 2023Assignee: STMicroelectronics (Research & Development) LimitedInventors: Andreas Aßmann, Brian Douglas Stewart
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Publication number: 20230010182Abstract: In an embodiment an apparatus includes a scanning photographic sensor configured to acquire an image, according to an integration time of the sensor, of a scene illuminated with periodically emitted light pulses by a source, so that the image has a regular succession of bands with different luminosities when the integration time of the sensor is different from a period of the light pulses, a processor configured to generate a signature vector representative of the regular succession of bands with different luminosities being present in the image acquired by the photographic sensor, wherein the signature vector is independent of a reflectance of an objects of the scene and of a level of light in the scene, determine a frequency of the bands in the image on basis of the generated signature vector and determine the period of the pulses of the source on basis of the determined frequency of the bands in the image, and a controller configured to adjust the integration time of the photographic sensor so that the intType: ApplicationFiled: June 24, 2022Publication date: January 12, 2023Inventors: Arnaud Bourge, Tanguy Le Dauphin, Antoine Drouot, Brian Douglas Stewart
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Publication number: 20220130060Abstract: A system and method for a scalable depth sensor. The scalable depth sensor having an emitter, a receiver, and a processor. The emitter is configured to uniformly illuminate a scene within a field-of-view of the emitter. The receiver including a plurality of detectors, each detector configured to capture depth and intensity information corresponding to a subset of the field-of-view. The a processor connected to the detector and configured to selectively sample a subset of the plurality of the detectors in accordance with compressive sensing techniques, and provide an image in accordance with an output from the subset of the plurality of the detectors, the image providing a depth and intensity image corresponding to the field-of-view of the emitter.Type: ApplicationFiled: October 28, 2020Publication date: April 28, 2022Inventors: Andreas Aßmann, Brian Douglas Stewart
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Method of operating a leaky integrator, leaky integrator and apparatus comprising a leaky integrator
Patent number: 11290656Abstract: The present disclosure relates to receiving an input signal; generating an output signal by integrating a leaked signal over an integration time, wherein the leaked signal is obtained based on a dampening signal, a leak factor and the input signal; and providing the output signal.Type: GrantFiled: March 10, 2020Date of Patent: March 29, 2022Assignee: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITEDInventor: Brian Douglas Stewart -
Publication number: 20210264579Abstract: The present disclosure relates to a tone mapping method for a succession of images implemented by an image processing device. The method including a) the division of the images of the succession of images in a plurality of sub-blocks of first pixels; b) for a first image (INPUT_IMAGEf) of the succession of images, the creation of a first mini-image (MPICf) comprising pixels of the first mini-image, each pixel of the first mini-image representing a corresponding sub-block of the first image, the intensity of each pixel of the first mini-image being representative of the intensity of the first pixels of the corresponding sub-block; c) the storage of the first mini-image (MPICf) in a memory; and d) for a second image (INPUT_IMAGEf+1) of the succession of images, the modification of the second image according to the first mini-image (MPICf) in order to generate an output image.Type: ApplicationFiled: February 4, 2021Publication date: August 26, 2021Applicants: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, STMICROELECTRONICS SAInventors: Héloïse Eliane Geneviève GRESSET, Brian Douglas STEWART
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METHOD OF OPERATING A LEAKY INTEGRATOR, LEAKY INTEGRATOR AND APPARATUS COMPRISING A LEAKY INTEGRATOR
Publication number: 20200296308Abstract: The present disclosure relates to receiving an input signal; generating an output signal by integrating a leaked signal over an integration time, wherein the leaked signal is obtained based on a dampening signal, a leak factor and the input signal; and providing the output signal.Type: ApplicationFiled: March 10, 2020Publication date: September 17, 2020Applicant: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITEDInventor: Brian Douglas STEWART -
Publication number: 20140090533Abstract: A rotary die cutting system includes a die cutting roll having at least one blade thereon for cutting a web, and an indicator on the surface of the die cutting roll indicating the position of the at least one blade. An anvil roll, spaced from the die cutting roll defines a web path therebeween. A drive mechanism drives the die cutting roll. A first sensor senses the indicator on the surface of the die cutting roll, and a control, responsive to the first sensor, operates the drive mechanism to adjust the rotational position of the die cutting roll to align the die cutting roll relative to the web passing through the web path.Type: ApplicationFiled: September 9, 2013Publication date: April 3, 2014Applicant: MARK ANDY, INC.Inventors: Joseph Thomas Calmese, Bradley Edward Hedrick, William Allen McCroskey, Brian Douglas Stewart, Kevin Neal Furmanek, Steven Carl Weinberg, Jeffrey Lee Feltz
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Patent number: 7899264Abstract: The method of determining a focus measure from an image includes detecting one or more edges in the image by processing the image with one or more first order edge detection kernels adapted to reject edge phasing effects. A first measure of the strength of each of the edges, and the contrast of each of the edges may be determined. The method may include normalizing the first measure of the strength of each of the edges by the contrast of each of the edges to obtain a second measure of the strength of each of the edges, and resealing the second measure of the strength of each of the edges. The method may also include selecting one or more of the edges from the image in accordance with the second measure of their strengths, and calculating the focus measure from the second measure of the strengths of the selected edges.Type: GrantFiled: August 5, 2005Date of Patent: March 1, 2011Assignee: STMicroelectronics Ltd.Inventor: Brian Douglas Stewart