概述

什麼是人流計數？
人流計數是一項自動化技術，可透過單一影像或一段時間內的多張影像，提供現場人數的統計。

其中一種人流計數方式是使用影像分析技術。攝影機內建的深度學習 AI 可透過影像特徵自動辨識與統計人數。

區域計數與累積流量計數有什麼不同？
區域計數是指攝影機在單一影格內統計出現的所有人數，每張畫面都會有對應的人數總計。當此數量達到預設門檻時，可產生事件通知。例如，若設定門檻為10人，當畫面中同時出現10人以上時，攝影機便會主動發出警示事件給 NVR。

累積流量計數則是指攝影機透過虛擬線條逐一統計進入某個區域的人數，並可區分進出方向。這類資料將會被儲存為中繼資料（metadata），供後續查詢使用。

Counting Metadata or Counting OSD?
ACTi's cameras can deliver counting data in two ways - either using a text-based metadata in parallel with the video stream, or embedding the live counting values onto the video overlay (OSD).

The benefits of the counting metadata is that the text-based counting numbers stored on the server side can later be used to generate counting reports by the time periods, whereas the OSD-based counting numbers are good for instant assessments by looking at the video, furthermore, such OSD-based counting display method does not require any special integration between the camera and the management server.

In fact, you could even use the camera alone, and simply observe the video stream with embedded counting using camera's own web interface.

Counting Alerts
Counting solution can be used for a High Occupancy Alarm. There are two solutions for that. Single camera based solution counts the difference between incoming and outgoing people, resulting with the current occupancy in the premises. Together with the pre-defined threshold levels (low warning, medium warning, critical warning), the camera will send the alarm to the video management system when the threshold has been surpassed.

ACTi also has a multi-camera solution where the occupancy is calculated using several cameras on several entrances at the same time. In such cases, the occupancy situation is calculated by the NVR, having received the information from the related cameras.

Business or Security Counting?
While most counting applications are related to the business analysis where the people traffic numbers by time periods help make some useful business decisions, the high occupancy alarms are often used for the security reasons - when the area exceeds the permitted maximum capacity of the people, then the security personnel should automatically be notified. Single image page counting detects unexpected crowds within the view of the camera. Having the alarm about such crowd is also a very helpful security feature.

應用

區域計數常用於群眾偵測與擁擠預警。保全人員可設定群聚門檻值，當人數超過該門檻時，攝影機會即時通報監控中心。

而累積流量計數則適用於人員逐一進出、無法同時出現在畫面中的場域，如商場入口或會議場地。透過長時間的人流統計，攝影機能判斷目前是否已有過多人員進入該區域。

特點

• 區域型人流計數
• 累積流量型人流計數
• 中繼資料傳輸支援
• 支援主動（Push）與被動（Pull）中繼資料傳送
• 可設定門檻條件進行告警

解決方案

ACTi 提供完整的人流計數解決方案，包含專用計數攝影機與錄影主機（NVR），可依照場域需求選擇多樣化的攝影機型號。
深入了解

我們建議搭配 ACTi 的 NVR 3 Corporate 或 ZNR-424 作為人流計數資料的接收與管理主機。無需額外 AI 授權，只需使用一般影像通道授權即可。
深入了解