Patents by Inventor Soman Nikhara
Soman Nikhara 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: 10511771Abstract: Disclosed herein are techniques for dynamically configuring an image sensor of a mobile device for visible light communication (VLC) to an operational mode based on the position of the image of a VLC source on the image sensor and the different regions of interest (ROIs) of different operational modes of the image sensor. The operational mode that the image sensor is configured to has the smallest ROI among ROIs of operational modes that include at least a portion of the image of the VLC source on the image sensor. Techniques disclosed herein can reduce the power consumption of the mobile device during VLC communication and improve the effective sampling rate of VLC signals by the image sensor.Type: GrantFiled: April 21, 2017Date of Patent: December 17, 2019Assignee: QUALCOMM IncorporatedInventors: Ravi Shankar Kadambala, Bapineedu Chowdary Gummadi, Soman Nikhara
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Patent number: 10475405Abstract: Techniques are described for controlling the display refresh rate of a display panel. A display driver may determine a display refresh rate based on user activity. One example of user activity is a rate at which a user is scrolling image content being displayed on the display panel. One example of user activity is a duration or pressure of a user interaction with a display panel or a pressure sensor.Type: GrantFiled: December 7, 2017Date of Patent: November 12, 2019Assignee: QUALCOMM IncorporatedInventors: Ankita Anil Kumar Choudha, Soman Nikhara, Vishnuvardhan Prodduturi, Prashant Nukala, Jayant Shekhar, Raviteja Tamatam, Kalyan Thota
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Patent number: 10423049Abstract: An electronic device is described. The electronic device includes an image sensor that is configured to capture phase detection data for automatic focusing. The electronic device also includes an automatic focusing module that is configured to dynamically enable or disable transmission of the phase detection data from the image sensor. The automatic focusing module may be configured to enable transmission of the phase detection data from the image sensor in response to detecting a scene change.Type: GrantFiled: June 12, 2017Date of Patent: September 24, 2019Assignee: QUALCOMM IncorporatedInventors: Soman Nikhara, Bapineedu Chowdary Gummadi, Ravi Shankar Kadambala
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Patent number: 10409141Abstract: Methods, systems, computer-readable media, and apparatuses for improved camera flash are presented. In some embodiments, a method includes performing an autofocus technique on a scene to obtain an autofocus output. The method also includes obtaining an ambient light measurement of the scene. The method further includes adjusting a sensitivity of an image sensor based at least in part on the autofocus output and the ambient light measurement. The method additionally includes, after adjusting the light sensitivity of the image sensor, illuminating the scene using a pre-flash.Type: GrantFiled: September 20, 2017Date of Patent: September 10, 2019Assignee: Qualcomm IncorporatedInventors: Soman Nikhara, Ravi Shankar Kadambala, Bapineedu Chowdary Gummadi
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Publication number: 20190230253Abstract: Methods, systems, and devices for color enhancement are described. A device may receive a raw image from a sensor (e.g., a camera of the device). The device may detect multiple regions of pixels corresponding to different image features in the raw image. For example, each region of pixels may correspond to one or more facial features. The device may compute one or more color ratios for each region of pixels. The device may then determine a respective color correction matrix for each region of pixels based at least in part on the one or more color ratios associated with that region of pixels. The device may generate a color-corrected image based on applying the respective color correction matrix to each region of pixels and may output the color-corrected image (e.g., to a display of the device, to a system memory, etc.).Type: ApplicationFiled: January 23, 2018Publication date: July 25, 2019Inventors: Soman Nikhara, Ho Sang Lee, Wei-Chih Liu
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Publication number: 20190180705Abstract: Techniques are described for controlling the display refresh rate of a display panel. A display driver may determine a display refresh rate based on user activity. One example of user activity is a rate at which a user is scrolling image content being displayed on the display panel. One example of user activity is a duration or pressure of a user interaction with a display panel or a pressure sensor.Type: ApplicationFiled: December 7, 2017Publication date: June 13, 2019Inventors: Ankita Anil Kumar Choudha, Soman Nikhara, Vishnuvardhan Prodduturi, Prashant Nukala, Jayant Shekhar, Raviteja Tamatam, Kalyan Thota
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Publication number: 20190182452Abstract: Techniques are described for controlling the display refresh rate of a display panel. A display driver may determine a display refresh rate based on user activity. One example of user activity is a rate at which a user is scrolling image content being displayed on the display panel. One example of user activity is a duration or pressure of a user interaction with a display panel or a pressure sensor.Type: ApplicationFiled: December 7, 2017Publication date: June 13, 2019Inventors: Ankita Anil Kumar Choudha, Soman Nikhara, Vishnuvardhan Prodduturi, Prashant Nukala, Jayant Shekhar, Raviteja Tamatam, Kalyan Thota
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Patent number: 10313579Abstract: A method of image processing includes capturing two frames of image data using a camera having a phase detection auto focus (PDAF) sensor, subtracting phase difference pixel data associated with the two frames of image data to produce residual phase difference values, detecting a region-of-interest change based on the residual phase differences values, and determining a focus for the PDAF camera sensor based on the detected region-of-interest change. The method may further include compressing the residual phase difference values, sending the compressed residual phase difference values to a processor, and reconstructing, with the processor, the phase difference pixel data from the compressed residual phase difference values.Type: GrantFiled: August 31, 2017Date of Patent: June 4, 2019Assignee: QUALCOMM IncorporatedInventors: Ravi Shankar Kadambala, Soman Nikhara, Bapineedu Chowdary Gummadi
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Publication number: 20190086769Abstract: Methods, systems, computer-readable media, and apparatuses for improved camera flash are presented. In some embodiments, a method includes performing an autofocus technique on a scene to obtain an autofocus output. The method also includes obtaining an ambient light measurement of the scene. The method further includes adjusting a sensitivity of an image sensor based at least in part on the autofocus output and the ambient light measurement. The method additionally includes, after adjusting the light sensitivity of the image sensor, illuminating the scene using a pre-flash.Type: ApplicationFiled: September 20, 2017Publication date: March 21, 2019Inventors: Soman Nikhara, Ravi Shankar Kadambala, Bapineedu Chowdary Gummadi
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Publication number: 20190068869Abstract: A method of image processing includes capturing two frames of image data using a camera having a phase detection auto focus (PDAF) sensor, subtracting phase difference pixel data associated with the two frames of image data to produce residual phase difference values, detecting a region-of-interest change based on the residual phase differences values, and determining a focus for the PDAF camera sensor based on the detected region-of-interest change. The method may further include compressing the residual phase difference values, sending the compressed residual phase difference values to a processor, and reconstructing, with the processor, the phase difference pixel data from the compressed residual phase difference values.Type: ApplicationFiled: August 31, 2017Publication date: February 28, 2019Inventors: Ravi Shankar Kadambala, Soman Nikhara, Bapineedu Chowdary Gummadi
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Publication number: 20190007589Abstract: Methods and devices for camera initialization are disclosed. In some aspects, a device includes a first camera to capture one or more first image frames, a second camera to capture one or more second image frames, and a camera controller coupled to the first camera and the second camera. The camera controller is configured to initialize the first camera, to cause the second camera to capture one or more second image frames while initializing the first camera, to determine an initial capture setting for the first camera based on the one or more second image frames captured by the second camera, and to complete initialization of the first camera using the initial capture setting.Type: ApplicationFiled: June 30, 2017Publication date: January 3, 2019Inventors: Ravi Shankar Kadambala, Soman Nikhara, Pradeep Veeramalla, Bapineedu Chowdary Gummadi
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Publication number: 20180376087Abstract: Systems and methods for performing HDR imaging are described. Aspects of the disclosure may include a camera system that uses the same pixels to capture both short and long exposure pixel data to improve camera hardware efficiency and pixel efficiency, and to reduce power usage by the camera system. In some aspects, exposure of a plurality of pixels available in a device may be started. Pixel data from the plurality of pixels may be captured after a first time period has elapsed to obtain short exposure pixel data. Pixel data from the plurality of pixels may also be captured after a second time period, longer than the first time period, has elapsed to obtain long exposure pixel data. The short exposure pixel data and the long exposure pixel data may be processed to create HDR images and/or videos.Type: ApplicationFiled: February 8, 2018Publication date: December 27, 2018Inventors: Ravi Shankar Kadambala, Soman Nikhara, Bapineedu Chowdary Gummadi
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Publication number: 20180359409Abstract: An electronic device is described. The electronic device includes an image sensor that is configured to capture phase detection data for automatic focusing. The electronic device also includes an automatic focusing module that is configured to dynamically enable or disable transmission of the phase detection data from the image sensor. The automatic focusing module may be configured to enable transmission of the phase detection data from the image sensor in response to detecting a scene change.Type: ApplicationFiled: June 12, 2017Publication date: December 13, 2018Inventors: Soman Nikhara, Bapineedu Chowdary Gummadi, Ravi Shankar Kadambala
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Publication number: 20180309928Abstract: Disclosed herein are techniques for dynamically configuring an image sensor of a mobile device for visible light communication (VLC) to an operational mode based on the position of the image of a VLC source on the image sensor and the different regions of interest (ROIs) of different operational modes of the image sensor. The operational mode that the image sensor is configured to has the smallest ROI among ROIs of operational modes that include at least a portion of the image of the VLC source on the image sensor. Techniques disclosed herein can reduce the power consumption of the mobile device during VLC communication and improve the effective sampling rate of VLC signals by the image sensor.Type: ApplicationFiled: April 21, 2017Publication date: October 25, 2018Inventors: Ravi Shankar Kadambala, Bapineedu Chowdary Gummadi, Soman Nikhara
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Publication number: 20180007336Abstract: Certain aspects relate to systems, methods, devices and non-transient computer readable medium for correlation based frame skipping of processing intensive image processing algorithms for image adjustments, such as automatic white balance (AWB) operations and automatic exposure correction (AEC) operations. In certain embodiments, if a scene is deemed stable based on determining a correlation between the statistics associated with a current and previous frames, certain steps for the purpose of performing processing intensive image processing algorithms, such as AWB operations and AEC operations, may be skipped.Type: ApplicationFiled: December 1, 2016Publication date: January 4, 2018Inventors: Soman Nikhara, Vignesh Bhuvaneshwar
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Patent number: 9860507Abstract: Certain aspects relate to systems and techniques for dynamically configuring frame skip for AWB calculations. For example, if RGB gains are deemed to be stable across a number of frames, the frame skip value used for AWB calculations can be increased. Changing RGB gains are indicators of image changes such as a changing scene and/or changing illuminant, which can indicate a need for updated AWB calculations, and accordingly the frame skip value can be set to zero or a low number of frames.Type: GrantFiled: June 6, 2016Date of Patent: January 2, 2018Assignee: QUALCOMM IncorporatedInventors: Soman Nikhara, Vignesh Bhuvaneshwar
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Publication number: 20160360176Abstract: Certain aspects relate to systems and techniques for dynamically configuring frame skip for AWB calculations. For example, if RGB gains are deemed to be stable across a number of frames, the frame skip value used for AWB calculations can be increased. Changing RGB gains are indicators of image changes such as a changing scene and/or changing illuminant, which can indicate a need for updated AWB calculations, and accordingly the frame skip value can be set to zero or a low number of frames.Type: ApplicationFiled: June 6, 2016Publication date: December 8, 2016Inventors: Soman Nikhara, Vignesh Bhuvaneshwar