Person Detection uses computer vision to detect people. Using on-camera computer vision analysis, the Blink Mini 2, Outdoor 4 and Wired Floodlight camera are able to tell the difference between a person and other types of motion.
Note: The Person Detection feature is only available when you have a Blink Subscription plan or trial. Learn more about Blink Subscription plan features!
The Person Detection setting is accessible from the More button
in the lower right corner, in the thumbnail image for your camera on the home screen. Tap Device Settings, then Motion Settings on the Device Settings screen and select Motion Recording Types. Next select Person Detection to only detect and record people in your video.
When people are detected as a motion type, you will see "There is a person at your <camera name>" as your notification or this 
icon in your clip list.