Amazon Textract
Developer Guide

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GetDocumentTextDetection

Gets the results for an Amazon Textract asynchronous operation that detects text in a document. Amazon Textract can detect lines of text and the words that make up a line of text.

You start asynchronous text detection by calling StartDocumentTextDetection, which returns a job identifier (JobId). When the text detection operation finishes, Amazon Textract publishes a completion status to the Amazon Simple Notification Service (Amazon SNS) topic that's registered in the initial call to StartDocumentTextDetection. To get the results of the text-detection operation, first check that the status value published to the Amazon SNS topic is SUCCEEDED. If so, call GetDocumentTextDetection, and pass the job identifier (JobId) from the initial call to StartDocumentTextDetection.

GetDocumentTextDetection returns an array of Block objects.

Each document page has as an associated Block of type PAGE. Each PAGE Block object is the parent of LINE Block objects that represent the lines of detected text on a page. A LINE Block object is a parent for each word that makes up the line. Words are represented by Block objects of type WORD.

Use the MaxResults parameter to limit the number of blocks that are returned. If there are more results than specified in MaxResults, the value of NextToken in the operation response contains a pagination token for getting the next set of results. To get the next page of results, call GetDocumentTextDetection, and populate the NextToken request parameter with the token value that's returned from the previous call to GetDocumentTextDetection.

For more information, see Document Text Detection.

Request Syntax

{ "JobId": "string", "MaxResults": number, "NextToken": "string" }

Request Parameters

The request accepts the following data in JSON format.

JobId

A unique identifier for the text detection job. The JobId is returned from StartDocumentTextDetection. A JobId value is only valid for 7 days.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 64.

Pattern: ^[a-zA-Z0-9-_]+$

Required: Yes

MaxResults

The maximum number of results to return per paginated call. The largest value you can specify is 1,000. If you specify a value greater than 1,000, a maximum of 1,000 results is returned. The default value is 1,000.

Type: Integer

Valid Range: Minimum value of 1.

Required: No

NextToken

If the previous response was incomplete (because there are more blocks to retrieve), Amazon Textract returns a pagination token in the response. You can use this pagination token to retrieve the next set of blocks.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: .*\S.*

Required: No

Response Syntax

{ "Blocks": [ { "BlockType": "string", "ColumnIndex": number, "ColumnSpan": number, "Confidence": number, "EntityTypes": [ "string" ], "Geometry": { "BoundingBox": { "Height": number, "Left": number, "Top": number, "Width": number }, "Polygon": [ { "X": number, "Y": number } ] }, "Id": "string", "Page": number, "Relationships": [ { "Ids": [ "string" ], "Type": "string" } ], "RowIndex": number, "RowSpan": number, "SelectionStatus": "string", "Text": "string" } ], "DocumentMetadata": { "Pages": number }, "JobStatus": "string", "NextToken": "string", "StatusMessage": "string", "Warnings": [ { "ErrorCode": "string", "Pages": [ number ] } ] }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

Blocks

The results of the text-detection operation.

Type: Array of Block objects

DocumentMetadata

Information about a document that Amazon Textract processed. DocumentMetadata is returned in every page of paginated responses from an Amazon Textract video operation.

Type: DocumentMetadata object

JobStatus

The current status of the text detection job.

Type: String

Valid Values: IN_PROGRESS | SUCCEEDED | FAILED | PARTIAL_SUCCESS

NextToken

If the response is truncated, Amazon Textract returns this token. You can use this token in the subsequent request to retrieve the next set of text-detection results.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: .*\S.*

StatusMessage

The current status of an asynchronous text-detection operation for the document.

Type: String

Warnings

A list of warnings that occurred during the text-detection operation for the document.

Type: Array of Warning objects

Errors

AccessDeniedException

You aren't authorized to perform the action.

HTTP Status Code: 400

InternalServerError

Amazon Textract experienced a service issue. Try your call again.

HTTP Status Code: 500

InvalidJobIdException

An invalid job identifier was passed to GetDocumentAnalysis or to GetDocumentAnalysis.

HTTP Status Code: 400

InvalidParameterException

An input parameter violated a constraint. For example, in synchronous operations, an InvalidParameterException exception occurs when neither of the S3Object or Bytes values are supplied in the Document request parameter. Validate your parameter before calling the API operation again.

HTTP Status Code: 400

ProvisionedThroughputExceededException

The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Textract.

HTTP Status Code: 400

ThrottlingException

Amazon Textract is temporarily unable to process the request. Try your call again.

HTTP Status Code: 500

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: