公开(公告)号：US20150269744A1

公开(公告)日：2015-09-24

申请号：US14665345

申请日：2015-03-23

Applicant: TATA CONSULTANCY SERVICES LIMITED

Inventor： Dipti Prasad MUKHERJEE ,  Tamal BATABYAL ,  Tanushyam CHATTOPADHYAY

IPC: G06T7/20 ,  G06T7/00

CPC classification number: G06K9/44 ,  G06F3/011 ,  G06K9/00342 ,  G06K9/4685

Abstract: A processor implemented system and method for identification of an activity performed by a subject based on sensor data analysis is described herein. In an implementation, the method includes capturing movements of the subject in real-time using a sensing device. At least one action associated with the subject is ascertained from a predefined set of actions. From the predefined set of actions, a plurality of actions can collectively form at least one activity. The ascertaining is based on captured movements of the subject and at least one predefined action rule. The at least one action rule is based on context-free grammar (CFG) and is indicative of a sequence of actions for occurrence of the at least one activity. Further, a current activity performed by the subject is dynamically determined, based on the at least one action and an immediately preceding activity, using a non-deterministic push-down automata (NPDA) state machine.

Abstract translation: 本文描述了一种用于基于传感器数据分析来识别被摄体执行的活动的处理器实现的系统和方法。 在实现中，该方法包括使用感测装置实时地捕获被摄体的移动。 根据预定义的一组动作来确定与主题相关联的至少一个动作。 从预定义的一组动作，多个动作可以共同形成至少一个活动。 确定是基于被摄体的捕获的移动和至少一个预定义的动作规则。 所述至少一个动作规则基于上下文无关语法（CFG），并且指示用于发生所述至少一个活动的一系列动作。 此外，使用非确定性下推自动机（NPDA）状态机，基于所述至少一个动作和紧接在前的活动来动态地确定由所述对象执行的当前活动。