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Serverless image-processing workflow

AWS Passport Photo Automation

Built a serverless, event-driven AWS system that automatically evaluates passport-style photographs, persists validation results, broadcasts processing outcomes and exposes results through an API.

  • AWS Lambda
  • S3
  • Rekognition
  • DynamoDB
  • API Gateway
  • SNS
  • Lambda Destinations
  • Python
Architecture diagram with three flows: image upload to S3 triggering a Lambda that calls Rekognition and writes to DynamoDB; Lambda Destinations publishing results to SNS; and an API Gateway endpoint invoking a Lambda that reads images from DynamoDB by ID.
Three decoupled flows: data processing, notifications and retrieval.

Overview

A serverless AWS architecture designed to automate passport photo validation. Images uploaded to S3 trigger Lambda processing, Amazon Rekognition evaluates facial attributes against validation requirements, and approval or rejection results are stored in DynamoDB.

The project extends beyond image processing with asynchronous notifications through Lambda Destinations and SNS, plus an API Gateway/Lambda workflow for retrieving evaluation results.

Architecture

Image processing

  1. S3 image upload
  2. AWS Lambda
  3. Amazon Rekognition
  4. DynamoDB

Uploaded photographs trigger a Lambda function which calls Rekognition to evaluate the image. The resulting approval/rejection information is persisted in DynamoDB.

Notifications

  1. Lambda processing
  2. Lambda Destinations
  3. SNS
  4. Downstream services

Processing results are passed through Lambda Destinations to SNS, separating the image-processing workflow from services consuming completion notifications.

API access

  1. API Gateway
  2. AWS Lambda
  3. DynamoDB
  4. Evaluation result

A separate Lambda function queries DynamoDB through an API Gateway endpoint, allowing external systems to retrieve photo evaluation results and rejection information.

What it covers

  • Event-driven serverless architecture
  • S3 event-triggered processing
  • AWS Lambda
  • Amazon Rekognition
  • DynamoDB persistence
  • Lambda Destinations
  • SNS notifications
  • API Gateway
  • Python
  • Decoupled processing, notification and retrieval workflows

Note

This is engineering evidence rather than a currently live production service; the AWS infrastructure is not presented as running today.