There are a number of limits that relate to Amazon Rekognition:
- Amazon Rekognition supports the PNG and JPEG image formats. So the images provided as input to various API operations, such as
DetectLabels, must be in one of the supported formats. - Images up to 5 MB are passed directly as raw bytes. Images over 5 MB go via an S3 bucket setup for Intelligence Services and Rekognition. The maximum image size allowed by Rekognition is limited to 15 MB.
- The minimum image size is 80 pixels for both height and width.
See the AWS site for more details: Limits in Amazon Rekognition, Amazon Rekognition service quotas.