公开(公告)号：US10511771B2

公开(公告)日：2019-12-17

申请号：US15494241

申请日：2017-04-21

Applicant: QUALCOMM Incorporated

Inventor： Ravi Shankar Kadambala ,  Bapineedu Chowdary Gummadi ,  Soman Nikhara

IPC: H04N5/232 ,  H04N5/374 ,  H04B10/116

Abstract: 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.

公开(公告)号：US10409141B2

公开(公告)日：2019-09-10

申请号：US15710752

申请日：2017-09-20

Applicant: QUALCOMM Incorporated

Inventor： Soman Nikhara ,  Ravi Shankar Kadambala ,  Bapineedu Chowdary Gummadi

IPC: G03B15/05 ,  H04N5/232 ,  H04N5/225 ,  H04N5/235 ,  H05B33/08 ,  G03B7/16 ,  G03B7/08 ,  G03B13/36

Abstract: 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.

公开(公告)号：US20190230253A1

公开(公告)日：2019-07-25

申请号：US15877927

申请日：2018-01-23

Applicant: QUALCOMM Incorporated

Inventor： Soman Nikhara ,  Ho Sang Lee ,  Wei-Chih Liu

IPC: H04N1/60

Abstract: 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.).

公开(公告)号：US20190182452A1

公开(公告)日：2019-06-13

申请号：US15834847

申请日：2017-12-07

Applicant: QUALCOMM Incorporated

Inventor： Ankita Anil Kumar Choudha ,  Soman Nikhara ,  Vishnuvardhan Prodduturi ,  Prashant Nukala ,  Jayant Shekhar ,  Raviteja Tamatam ,  Kalyan Thota

IPC: H04N7/01 ,  G06F3/0485

Abstract: 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.

公开(公告)号：US20190180705A1

公开(公告)日：2019-06-13

申请号：US15834915

申请日：2017-12-07

Applicant: QUALCOMM Incorporated

Inventor： Ankita Anil Kumar Choudha ,  Soman Nikhara ,  Vishnuvardhan Prodduturi ,  Prashant Nukala ,  Jayant Shekhar ,  Raviteja Tamatam ,  Kalyan Thota

IPC: G09G3/36 ,  G09G5/34 ,  G06F3/041 ,  G06F3/0485 ,  G09G3/34

Abstract: 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.

公开(公告)号：US10313579B2

公开(公告)日：2019-06-04

申请号：US15693078

申请日：2017-08-31

Applicant: QUALCOMM Incorporated

Inventor： Ravi Shankar Kadambala ,  Soman Nikhara ,  Bapineedu Chowdary Gummadi

IPC: G03B13/00 ,  H04N5/232 ,  H04N5/225 ,  H04N5/369

Abstract: 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.

公开(公告)号：US20180309928A1

公开(公告)日：2018-10-25

申请号：US15494241

申请日：2017-04-21

Applicant: QUALCOMM Incorporated

Inventor： Ravi Shankar Kadambala ,  Bapineedu Chowdary Gummadi ,  Soman Nikhara

IPC: H04N5/232 ,  H04N5/374 ,  H04N5/353 ,  H04N5/369 ,  H04B10/116

CPC classification number: H04N5/23245 ,  H04B10/116 ,  H04N5/23241 ,  H04N5/374

Abstract: 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.