Programming Snapshot – AWS
After some initial steps in a previous article [1] to set up an AWS account, an S3 storage server with a static web server, and the first Lambda function, I'll now show you how to set up an API server on Amazon to track down interesting scenes in videos from a surveillance camera.
The Lambda function triggered either by a web request from the browser or a command-line tool like curl retrieves a video from the web, runs it through an artificial intelligence (AI) algorithm implemented by the OpenCV library, generates a motion profile, and returns the URL of a contact sheet generated as a JPEG with all the interesting movements from the recording (Figures 1 and 2).
Figure 1: The AI program for motion analysis runs on Amazon servers behind a REST API.
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