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Detects text in the input image and converts it into machine-readable text.
Pass the input image as base64-encoded image bytes or as a reference to an image in an Amazon S3 bucket. If you use the AWS CLI to call Amazon Rekognition operations, you must pass it as a reference to an image in an Amazon S3 bucket. For the AWS CLI, passing image bytes is not supported. The image must be either a .png or .jpeg formatted file.
DetectText operation returns text in an array of elements,
TextDetection element provides information about a single word or
line of text that was detected in the image.
A word is one or more ISO basic latin script characters that are not separated by
DetectText can detect up to 50 words in an image.
A line is a string of equally spaced words. A line isn't necessarily a complete sentence.
For example, a driver's license number is detected as a line. A line ends when there
is no aligned text after it. Also, a line ends when there is a large gap between words,
relative to the length of the words. This means, depending on the gap between words,
Amazon Rekognition may detect multiple lines in text aligned in the same direction.
Periods don't represent the end of a line. If a sentence spans multiple lines, the
DetectText operation returns multiple lines.
To determine whether a
TextDetection element is a line of text or a word,
To be detected, text must be within +/- 30 degrees orientation of the horizontal axis.
For more information, see DetectText in the Amazon Rekognition Developer Guide.
For .NET Core and PCL this operation is only available in asynchronous form. Please refer to DetectTextAsync.
public abstract DetectTextResponse DetectText( DetectTextRequest request )
Container for the necessary parameters to execute the DetectText service method.
|AccessDeniedException||You are not authorized to perform the action.|
|ImageTooLargeException||The input image size exceeds the allowed limit. For more information, see Limits in Amazon Rekognition in the Amazon Rekognition Developer Guide.|
|InternalServerErrorException||Amazon Rekognition experienced a service issue. Try your call again.|
|InvalidImageFormatException||The provided image format is not supported.|
|InvalidParameterException||Input parameter violated a constraint. Validate your parameter before calling the API operation again.|
|InvalidS3ObjectException||Amazon Rekognition is unable to access the S3 object specified in the request.|
|ProvisionedThroughputExceededException||The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Rekognition.|
|ThrottlingException||Amazon Rekognition is temporarily unable to process the request. Try your call again.|
Supported in: 4.5, 4.0, 3.5
Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms