公开(公告)号：US20230171505A1

公开(公告)日：2023-06-01

申请号：US18054832

申请日：2022-11-11

Applicant: Tata Consultancy Services Limited

Inventor： Amit SWAIN ,  Arindam RAY ,  Tapas CHAKRAVARTY ,  Chirabrata BHAUMIK ,  Smriti RANI

IPC: H04N5/235

CPC classification number: H04N5/2354 ,  H04N5/2351

Abstract: Lighting conditions affect quality of images being captured. In traditional systems, illuminators (light sources) are used to illuminate the objects without considering illumination levels at different zones/sides of an object being photographed. As a result, all illuminators may run at maximum capacity, resulting in wastage of power and compromising efficiency of the system. The disclosure herein generally relates to illumination of objects, and, more particularly, to a method and system for adaptive illumination of objects. The system determines illumination at different zones of the object, and further identifies zones that are not illuminated properly in comparison with a threshold of illumination. Further the system controls intensity of only the illuminators which are responsible for illumination of the zones in which measured illumination is below a threshold of illumination, and increases the intensity by a value determined based on difference between measured illumination and the threshold of illumination, for each zone.

公开(公告)号：US20210199796A1

公开(公告)日：2021-07-01

申请号：US17105242

申请日：2020-11-25

Applicant: Tata Consultancy Services Limited

Inventor： Anwesha KHASNOBISH ,  Arindam RAY ,  Smriti RANI ,  Amit SWAIN ,  Chirabrata BHAUMIK ,  Tapas CHAKRAVARTY

IPC: G01S13/88 ,  G01S7/41 ,  G01S13/02

Abstract: Radar based HR and BR measurements by simultaneous decoding is a technical problem due to presence of intermodulation of BR and HR harmonics, which degrades simultaneous decoding. Embodiments herein provide a method and system for unobtrusive liveliness detection and monitoring of a subject using a Dual Frequency Radar (DFR) in an IOT network. The system has the capability to completely process the captured raw signals onboard to by applying required signal conditioning and extraction of relevant information using unique signal processing techniques for determining the HR and the BR of the subject accurately. The intermodulation of BR and HR harmonics is eliminated by the system by performing frequency spectrum averaging of both radars signals, which improves the accuracy. Further, the system is configured with a light MQTT protocol and encoding modules for any data to be shared for off board processing, ensuring data security and privacy compliance.