Rekognition service limits.

Amazon Rekognition is a deep learning-based image and video analysis service provided by AWS. It allows you to analyze images and videos to extract information such as objects, scenes, faces, and more. Rekognition has specific limits to ensure efficient operation. As of my last knowledge update in September 2021, here are some common limits for Amazon Rekognition:

1. Image Size:
   • The maximum image size for synchronous operations (e.g., DetectLabels, DetectFaces, etc.) is 15MB.
2. Video Size:
   • The maximum video size for synchronous operations (e.g., StartLabelDetection, StartFaceDetection, etc.) is 2GB.
3. Video Duration:
   • The maximum video duration for synchronous operations is 6 hours.
4. Face Detection:
   • The maximum number of faces that can be detected in an image is 100.
5. Face Comparison:
   • The maximum number of faces that can be compared in a single operation is 4096.
6. Face Collection Size:
   • The maximum number of faces you can add to a face collection is 20 million.
7. Label Detection:
   • The maximum number of labels that can be detected in an image is 1000.
8. Text Detection:
   • The maximum number of text lines that can be detected in an image is 1000.
9. Celebrity Recognition:
   • The maximum number of celebrities recognized in a single image is 64.
10. Content Moderation:
    • The maximum number of labels detected in a single image is 1000.
11. StartLabelDetection Operation:
    • The maximum number of labels that can be detected in a single video is 50.
12. StartPersonTracking Operation:
    • The maximum number of people that can be tracked in a single video is 15.
13. StartFaceSearch Operation:
    • The maximum number of faces you can search for in a single video is 4096.
14. StartCelebrityRecognition Operation:
    • The maximum number of celebrities that can be recognized in a single video is 64.

Please note that these limits are based on information available up until September 2021. AWS may update these limits in the future, so it's always a good idea to refer to the latest AWS documentation for the most current information.

If you need to request a limit increase for any of these resources, you can do so through the AWS Service Quotas console or by contacting AWS Support. Keep in mind that limit increases are subject to approval and may take some time to process.