82 research outputs found
Towards Crowd-aware Indoor Path Planning (Extended Version)
Indoor venues accommodate many people who collectively form crowds. Such
crowds in turn influence people's routing choices, e.g., people may prefer to
avoid crowded rooms when walking from A to B. This paper studies two types of
crowd-aware indoor path planning queries. The Indoor Crowd-Aware Fastest Path
Query (FPQ) finds a path with the shortest travel time in the presence of
crowds, whereas the Indoor Least Crowded Path Query (LCPQ) finds a path
encountering the least objects en route. To process the queries, we design a
unified framework with three major components. First, an indoor crowd model
organizes indoor topology and captures object flows between rooms. Second, a
time-evolving population estimator derives room populations for a future
timestamp to support crowd-aware routing cost computations in query processing.
Third, two exact and two approximate query processing algorithms process each
type of query. All algorithms are based on graph traversal over the indoor
crowd model and use the same search framework with different strategies of
updating the populations during the search process. All proposals are evaluated
experimentally on synthetic and real data. The experimental results demonstrate
the efficiency and scalability of our framework and query processing
algorithms.Comment: The extension of a VLDB'21 paper "Towards Crowd-aware Indoor Path
Planning
CommuNety: deep learning-based face recognition system for the prediction of cohesive communities
Effective mining of social media, which consists of a large number of users is a challenging task. Traditional approaches rely on the analysis of text data related to users to accomplish this task. However, text data lacks significant information about the social users and their associated groups. In this paper, we propose CommuNety, a deep learning system for the prediction of cohesive networks using face images from photo albums. The proposed deep learning model consists of hierarchical CNN architecture to learn descriptive features related to each cohesive network. The paper also proposes a novel Face Co-occurrence Frequency algorithm to quantify existence of people in images, and a novel photo ranking method to analyze the strength of relationship between different individuals in a predicted social network. We extensively evaluate the proposed technique on PIPA dataset and compare with state-of-the-art methods. Our experimental results demonstrate the superior performance of the proposed technique for the prediction of relationship between different individuals and the cohesiveness of communities
- …