Patents by Inventor Jeffrey Kempf
Jeffrey Kempf 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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Publication number: 20240071324Abstract: An example apparatus comprising: a controller configured to: access a content brightness map; determine an amplitude of a light emitting diode (LED) current based on the content brightness map, a target brightness, or a target color temperature; determine a pulse width modulation (PWM) sequence based on the content brightness map, the target brightness, or the target color temperature; determine an LED PWM signal based on the content brightness map, the target brightness, the target color temperature, or the amplitude of the LED current; transmit a signal indicating the LED current to an LED; transmit the PWM sequence to a spatial light modulator (SLM); and transmit the LED PWM signal to the LED.Type: ApplicationFiled: November 6, 2023Publication date: February 29, 2024Inventors: Aravind Lakshminarayanan, Jeffrey Kempf, Paul Rancuret
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Publication number: 20230412814Abstract: A system includes a controller configured to: obtain palette keys for an image; and for each of a plurality of sub-blocks of the image, obtain a compressed set of palette keys responsive to gradient analysis and entropy analysis. The system also includes a spatial light modulator coupled to the controller and configured to project an image responsive to the palette keys and the compressed set of palette keys.Type: ApplicationFiled: May 31, 2023Publication date: December 21, 2023Inventors: Jeffrey KEMPF, Jonathan LUCAS
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Patent number: 11847984Abstract: An example apparatus comprising: a controller configured to: access a content brightness map; determine an amplitude of a light emitting diode (LED) current based on the content brightness map, a target brightness, or a target color temperature; determine a pulse width modulation (PWM) sequence based on the content brightness map, the target brightness, or the target color temperature; determine an LED PWM signal based on the content brightness map, the target brightness, the target color temperature, or the amplitude of the LED current; transmit a signal indicating the LED current to an LED; transmit the PWM sequence to a spatial light modulator (SLM); and transmit the LED PWM signal to the LED.Type: GrantFiled: May 31, 2022Date of Patent: December 19, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Aravind Lakshminarayanan, Jeffrey Kempf, Paul Rancuret
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Publication number: 20230342958Abstract: Methods, apparatus, systems, and articles of manufacture to generate 3D point clouds based on spatiotemporal light patterns are disclosed. A controller includes processor circuitry to execute the instructions to generate a series of light patterns based on a set of light pattern tiles. Each of the light pattern tiles is defined by a different arrangement of illuminated pixels. Each of the light patterns is defined by a different arrangement of the light pattern tiles. The processor circuitry is to instruct a projector to project the series of light patterns; instruct an image sensor to capture a series of images of reflections of the series of light patterns; and generate a three-dimensional point cloud based on the series of captured images.Type: ApplicationFiled: September 22, 2022Publication date: October 26, 2023Inventors: Jeffrey Kempf, Kevin Tomei, Tyler Bower, Eric Pruett
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Publication number: 20230316468Abstract: An example apparatus includes: a controller configured to: generate a pattern of points; obtain a first image of a first reflection of a projection of the pattern of points from a first camera; generate a first point cloud having a first coordinate system based on the first image; obtain a second image of a second reflection of the projection of the pattern of points from a second camera; generate a second point cloud having a second coordinate system based on the second image; determine a rigid body transform to convert coordinates of the second coordinate system to coordinates of the first coordinate system; apply the rigid body transform to the second point cloud to generate a transformed point cloud; and generate a corrected point cloud based on the transformed point cloud.Type: ApplicationFiled: April 1, 2022Publication date: October 5, 2023Inventors: Shivam Srivastava, Jaime De La Cruz, Jeffrey Kempf
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Publication number: 20230245347Abstract: A device includes a memory and at least one processor coupled to the memory. The at least one processor is configured to obtain an image and determine a parent cluster of pixels of an image having a centroid. The at least one processor is also configured to split the parent cluster into at least a first child cluster and a second child cluster and assign a pixel of the image to the first child cluster. Additionally, the at least one processor is configured to update a centroid of the first child cluster based at least in part on the pixel, replace the pixel in the image with the centroid of the first child cluster to produce a compressed image, and store the compressed image in the memory.Type: ApplicationFiled: April 11, 2023Publication date: August 3, 2023Applicant: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Jonathan Andrew Lucas
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Publication number: 20230245265Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed to warp images for video processing. An example device includes horizontal warper circuitry configured to access an input image, decimate a first set of pixels in the input image by row, and interpolate a second set of pixels in the input image by row to produce a horizontally warped image. The example device further includes vertical warper circuitry configured to access the horizontally warped image, decimate a first set of pixels in the horizontally warped image by column, and interpolate a second set of pixels in the horizontally warped image by column to produce an output image.Type: ApplicationFiled: January 31, 2022Publication date: August 3, 2023Inventors: Jeffrey Kempf, Matthew C. Stroud, John Fenske
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Publication number: 20230186864Abstract: An example apparatus comprising: a controller configured to: access a content brightness map; determine an amplitude of a light emitting diode (LED) current based on the content brightness map, a target brightness, or a target color temperature; determine a pulse width modulation (PWM) sequence based on the content brightness map, the target brightness, or the target color temperature; determine an LED PWM signal based on the content brightness map, the target brightness, the target color temperature, or the amplitude of the LED current; transmit a signal indicating the LED current to an LED; transmit the PWM sequence to a spatial light modulator (SLM); and transmit the LED PWM signal to the LED.Type: ApplicationFiled: May 31, 2022Publication date: June 15, 2023Inventors: Aravind Lakshminarayanan, Jeffrey Kempf, Paul Rancuret
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Publication number: 20230058081Abstract: An example apparatus includes: a controller configured to: generate a symbol pattern as a result of placing symbols based on epipolar lines; instruct an SLM to project the symbol pattern; obtain an image of a reflection of the symbol pattern; determine a first location of a symbol in the image; determine a second location of the symbol in the image; and determine a depth of the symbol as based on the first location, the second location, and an essential matrix.Type: ApplicationFiled: April 12, 2022Publication date: February 23, 2023Inventors: Shashank Dabral, Jaime De La Cruz, Jeffrey Kempf
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Patent number: 8542244Abstract: System and method for generating multiprimary signals with optimization for bit depth for use in display devices. A preferred embodiment comprises converting an input color signal into an output color signal, wherein the number of colors in the output color signal is less than a number of colors used in a display system, when a weighting of the input color signal is less than a specified threshold, and converting the input color signal into an output color signal, wherein the number of colors in the output color signal is equal to the number of colors used in the display system, when the weighting of the input color signal is greater than the specified threshold. The use of fewer colors eliminates low bit depth colors, allowing increased dither quality in dimmer images.Type: GrantFiled: November 5, 2012Date of Patent: September 24, 2013Assignee: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Rajeev Ramanath
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Patent number: 7970230Abstract: A method of reducing ringing artifacts in image data that has been filtered with a high frequency emphasis filter. For each filtered data value, a local variance is calculated from data values at neighboring filter taps. This variance is compared to a threshold, and if the threshold is exceeded, the filtered data value is limited between local minimum and maximum values. A method of reducing noise, also using the local variance, is also described.Type: GrantFiled: August 1, 2007Date of Patent: June 28, 2011Assignee: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Arnold P. Skoog, Roger M. Ikeda
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Publication number: 20100246992Abstract: A content-dependent scan rate converter with adaptive noise reduction that provides a highly integrated, implementation efficient de-interlacer. By identifying and using redundant information from the image (motion values and edge directions), this scan rate converter is able to perform the tasks of film-mode detection, motion-adaptive scan rate conversion, and content-dependent video noise reduction. Adaptive video noise reduction is incorporated in the process where temporal noise reduction is performed on the still parts of the image, thus preserving high detail spatial information, and data-adaptive spatial noise reduction is performed on the moving parts of the image. A low-pass filter is used in flat fields to smooth out Gaussian noise and a direction-dependent median filter is used in the presence of impulsive noise or an edge. Therefore, the selected spatial filter is optimized for the particular pixel that is being processed to maintain crisp edges.Type: ApplicationFiled: June 4, 2010Publication date: September 30, 2010Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Jeffrey Kempf, Arnold P. Skoog, Clifford D. Fairbanks
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Patent number: 7738038Abstract: A content-dependent scan rate converter with adaptive noise reduction that provides a highly integrated, implementation efficient de-interlacer. By identifying and using redundant information from the image (motion values and edge directions), this scan rate converter is able to perform the tasks of film-mode detection, motion-adaptive scan rate conversion, and content-dependent video noise reduction. Adaptive video noise reduction is incorporated in the process where temporal noise reduction is performed on the still parts of the image, thus preserving high detail spatial information, and data-adaptive spatial noise reduction is performed on the moving parts of the image. A low-pass filter is used in flat fields to smooth out Gaussian noise and a direction-dependent median filter is used in the presence of impulsive noise or an edge. Therefore, the selected spatial filter is optimized for the particular pixel that is being processed to maintain crisp edges.Type: GrantFiled: May 20, 2008Date of Patent: June 15, 2010Assignee: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Arnold P. Skoog, Clifford D. Fairbanks
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Patent number: 7460275Abstract: An error diffusion method and system to ameliorate the effects of data quantization. The error diffusion method is especially well-suited to display systems that process groups of pixels in a given row (318) simultaneously. Errors generated when processing pixels in one row (318) of a first group (314) cannot be propagated to other pixels in the same row (318) of the same group (314) since the other pixels are processed by the time the error signal is available. The method and system pass errors from most of the pixels (302) in the group (314) to pixels below and to the right in the next row (320) of the same group (314). Errors from the last pixel (304) in the group (314) are passed to the pixel (308) in the following row (320) beneath the last pixel (304) and to the first pixel (310) in the next group (316) of pixels in the same row (318). To avoid creation of structured visual patterns, a white noise signal is added to the error signals.Type: GrantFiled: December 1, 2000Date of Patent: December 2, 2008Assignee: Texas Instruments IncorporatedInventor: Jeffrey Kempf
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Publication number: 20080218630Abstract: A content-dependent scan rate converter with adaptive noise reduction that provides a highly integrated, implementation efficient de-interlacer. By identifying and using redundant information from the image (motion values and edge directions), this scan rate converter is able to perform the tasks of film-mode detection, motion-adaptive scan rate conversion, and content-dependent video noise reduction. Adaptive video noise reduction is incorporated in the process where temporal noise reduction is performed on the still parts of the image, thus preserving high detail spatial information, and data-adaptive spatial noise reduction is performed on the moving parts of the image. A low-pass filter is used in flat fields to smooth out Gaussian noise and a direction-dependent median filter is used in the presence of impulsive noise or an edge. Therefore, the selected spatial filter is optimized for the particular pixel that is being processed to maintain crisp edges.Type: ApplicationFiled: May 20, 2008Publication date: September 11, 2008Applicant: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Arnold P. Skoog, Clifford D. Fairbanks
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Patent number: 7375760Abstract: A content-dependent scan rate converter with adaptive noise reduction that provides a highly integrated, implementation efficient de-interlacer. By identifying and using redundant information from the image (motion values and edge directions), this scan rate converter is able to perform the tasks of film-mode detection, motion-adaptive scan rate conversion, and content-dependent video noise reduction. Adaptive video noise reduction is incorporated in the process where temporal noise reduction is performed on the still parts of the image, thus preserving high detail spatial information, and data-adaptive spatial noise reduction is performed on the moving parts of the image. A low-pass filter is used in flat fields to smooth out Gaussian noise and a direction-dependent median filter is used in the presence of impulsive noise or an edge. Therefore, the selected spatial filter is optimized for the particular pixel that is being processed to maintain crisp edges.Type: GrantFiled: December 31, 2002Date of Patent: May 20, 2008Assignee: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Arnold P. Skoog, Clifford D. Fairbanks
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Publication number: 20070269129Abstract: A method of reducing ringing artifacts in image data that has been filtered with a high frequency emphasis filter. For each filtered data value, a local variance is calculated from data values at neighboring filter taps. This variance is compared to a threshold, and if the threshold is exceeded, the filtered data value is limited between local minimum and maximum values. A method of reducing noise, also using the local variance, is also described.Type: ApplicationFiled: August 1, 2007Publication date: November 22, 2007Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Jeffrey Kempf, Arnold Skoog, Roger Ikeda
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Patent number: 7254277Abstract: A method of reducing ringing artifacts in image data that has been filtered with a high frequency emphasis filter. For each filtered data value, a local variance is calculated from data values at neighboring filter taps. This variance is compared to a threshold, and if the threshold is exceeded, the filtered data value is limited between local minimum and maximum values. A method of reducing noise, also using the local variance, is also described.Type: GrantFiled: December 30, 2002Date of Patent: August 7, 2007Assignee: Texas Instruments IncorporatedInventors: Jeffrey Kempf, Arnold P. Skoog, Roger M. Ikeda
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Patent number: 7234619Abstract: An accessory strip for a vehicle having a bracket secured to a track at select locations. The bracket includes a cam on an inner end that is received by a cam lock bar. The cam is movable within the track to selected positions where it may be locked in place. The bracket may include a dovetail socket to which articles may be secured by means of a dovetail plug and also may include a hook on which articles may be hung by means of flexible handles, or the like. The accessory strip assembly may be attached to an interior wall or may be formed as an integral track on an interior wall or seat back of a vehicle.Type: GrantFiled: November 3, 2003Date of Patent: June 26, 2007Assignee: International Automotive Components Group North America, Inc.Inventors: Thomas S. Hicks, Jeffrey A. Kempf, James M. Hutek
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Publication number: 20070013717Abstract: System and method for gray scale mapping for displaying non-linear images on linear displays. A preferred embodiment comprises applying a linearizing function to a non-linear image to produce a linear image, selecting a picture element in the linear image, determining a first gray shade and a second gray shade based upon the picture element, computing a dither percentage, and selecting either the first gray shade or the second gray shade based upon the dither percentage and a threshold value. The dithering can reduce the presence of contouring, which reduces image quality, while non-linear spacing between gray shades permits the optimization of pulse width modulation sequences to reduce transition artifacts.Type: ApplicationFiled: July 13, 2005Publication date: January 18, 2007Inventor: Jeffrey Kempf