“ Measuring People-Flow Through Doorways using Easy-to-Install IR Array Sensors” by Sirajum Munir, SeyyedHessamAldin Mohammadmoradi, Omprakash Gnawali, and Charles P Shelton. US Patent No. US10948354B2, Dec. 2018.
A method of measuring people flow through a doorway using a low-resolution, low-cost infrared array is disclosed. The method includes reading a sequence of sensor data frames from the infrared array; determining a background temperature frame; determining whether sensor data frames include at least one person using noise filtering techniques; identifying at least one group of adjacent pixels corresponding to the at least one person; determining at least one location corresponding to the at least one person; and determining whether the at least one person is a same person as a person in a previous sensor data frame. Based on the matching of a same person through multiple sensor data frames, direction of movement and entry/exit events can be determined. The entry/exit events can advantageously be used to operate and HVAC system, security system, or other such system more efficiently and effectively.
BibTeX entry:
@article{peoplecounting-patent2018,
author = {Sirajum Munir, and SeyyedHessamAldin Mohammadmoradi and
Omprakash Gnawali and Charles P Shelton},
title = { Measuring People-Flow Through Doorways using Easy-to-Install
IR Array Sensors},
journal = { US Patent No. US10948354B2},
month = dec,
year = {2018}
}