Usando o Amazon Textract como OCR para Extração de Dados no DynamoDB

Overview

dio-live-textract2

Repositório de código para o live coding do dia 05/10/2021 sobre extração de dados estruturados e gravação em banco de dados a partir do Amazon Textract.

Serviços utilizados

  • Amazon Textract
  • AWS Lambda
  • Amazon S3
  • Amazon DynamoDB

Desenvolvimento

Criando um bucket no Amazon S3

  • S3 Console -> Create bucket -> Bucket name "dio-live-input-data" -> Manter as configurações padrão -> Create bucket

Processando imagens no Amazon Textract

  • Textract Console -> Select Document -> Analyze Document -> Tables
  • Download results -> Salvar arquivo .zip

Criando uma tabela no DynamoDB

  • DynamoDB Console -> Tables -> Create Table -> Partition key "cod" -> Create table

Implementando a função lambda

  • Lambda Console -> Functions -> Create function
  • Use a blueprint -> "s3-get-object-python"
  • Function name "dio-live-csv-to-db"
  • Execution role -> "Create a new role from AWS policy templates" -> Role name "S3ToDynamoDBRole"
  • S3 Trigger -> Bucket criado anteriormente
  • Create function
  • Substituir o código gerado pelo código da pasta /src deste repositório (Obs: atenção para o nome da tabela, deve ser substituído pelo nome da sua)

Passo adicional: Criando um layer com a biblioteca boto3 do Python

  • Lambda Console -> Additional Resources -> Layers
  • Name "boto3_layer" -> Upload a .zip file -> baixe e insira o arquivo .zip contido na pasta /src deste respositório
  • Compatible architecture "x86_64"
  • Compatible runtimes "Python3.7" (É necessário ser Python3.7 para ser compatível com a versão do blueprint utilizado)
  • Create
  • Na função lambda criada -> Selecione layers no diagrama -> Add layer -> Custom layers "boto3_layer" -> Version 1 -> Add

Configurando permissões no Lambda para o DynamoDB

  • Lambda Console -> Functions -> Selecione a função criada -> Configuration -> Permission -> Execution Role -> Abrir a role criada no Amazon IAM
  • No IAM -> Permission -> Add inline policy -> Choose a service "DynamoDB" -> Write "PutItem"
  • Resources -> Selecionar o Arn da sua tabela -> Selecionar a sua região -> Add -> Review Policy -> Name "LambdaDynamoDBPolicy" -> Create policy

Utilizando a aplicação

No Amazon Textract

  • Amazon Textract Console -> Select Document -> Choose file -> Buscar o arquivo a ser analisado
  • Download results

No Amazon S3

  • Extrair o arquivo table_1.csv do arquivo baixado do Amazon Textract
  • Acessar o bucket criado anteriormente -> Upload -> Selecionar o arquivo table_1.csv -> Upload

No DynamoDB

  • Tables -> Acessar a tabela criada -> View Items
Owner
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