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：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.

公开(公告)号：US20180212678A1

公开(公告)日：2018-07-26

申请号：US15411698

申请日：2017-01-20

Applicant: QUALCOMM Incorporated

Inventor： Bapineedu Chowdary Gummadi ,  Ravi Shankar Kadambala ,  Vivek Veenam

IPC: H04B10/116 ,  H04N7/18 ,  H04M1/02

CPC classification number: H04B10/116 ,  H04N7/185

Abstract: Disclosed are techniques for optimizing visual light communication (VLC) processing performed at a mobile device. In an aspect, an image sensor of the mobile device having a rolling shutter captures a plurality of lines of an image frame, an image signal processor (ISP) coupled to the image sensor writes each line of the plurality of lines of the image frame into a dual port memory as each line of the plurality of lines of the image frame is received from the image sensor, and, for each line of the plurality of lines of the image frame, a VLC decoder of the mobile device reads a first line of the plurality of lines of the image frame from the dual port memory while the ISP writes a second line of the plurality of lines of the image frame to the dual port memory.