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Easy⏱ time1 hr$ cost0

Face Detection Counter

Use a ready model to detect faces in a webcam feed and count how many it sees.

Start building ↓
fig — working model Result first

The build

Step 01

Open the camera

Start a webcam stream.

Step 02

Run detection

Apply a pre-trained face detector to each frame.

Step 03

Draw boxes

Outline each detected face.

Step 04

Count

Display the number of faces.

Working Principle

A pre-trained detector scans each frame for face-like patterns and reports a box around every face it finds, which you tally.

The science behind it

A closer look

Detection differs from recognition: it finds where faces are, not who they are. Use only your own images and respect privacy.

Take it further

Variables to test

  • 1 Test groups vs single faces — accuracy?
  • 2 Vary distance — when does it miss faces?
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