Detete etiquetas numa imagem através da Cloud Vision API

Antes de começar

Se ainda não o fez, use as seguintes instruções para configurar o seu projeto e criar um contentor do Cloud Storage.

Configure o seu projeto

Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Roles required to select or create a project

• Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
• Create a project: To create a project, you need the Project Creator (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

Enable the Cloud Vision API.

Roles required to enable APIs

To enable APIs, you need the Service Usage Admin IAM role (roles/serviceusage.serviceUsageAdmin), which contains the serviceusage.services.enable permission. Learn how to grant roles.

Enable the API

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Roles required to select or create a project

• Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
• Create a project: To create a project, you need the Project Creator (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

Enable the Cloud Vision API.

Roles required to enable APIs

To enable APIs, you need the Service Usage Admin IAM role (roles/serviceusage.serviceUsageAdmin), which contains the serviceusage.services.enable permission. Learn how to grant roles.

Enable the API

Crie um contentor do Cloud Storage

1. In the Google Cloud console, go to the Cloud Storage Buckets page.

   Go to Buckets

2. Click add_box Create.
3. On the Create a bucket page, enter your bucket information. To go to the next step, click Continue.
   1. For Name your bucket, enter a unique bucket name. Don't include sensitive information in the bucket name, because the bucket namespace is global and publicly visible.
   2. In the Choose where to store your data section, do the following:
      1. Select a Location type.
      2. Choose a location where your bucket's data is permanently stored from the Location type drop-down menu.
         • If you select the dual-region location type, you can also choose to enable turbo replication by using the relevant checkbox.
      3. To set up cross-bucket replication, select Add cross-bucket replication via Storage Transfer Service and follow these steps:

         Set up cross-bucket replication

         1. In the Bucket menu, select a bucket.

         2. In the Replication settings section, click Configure to configure settings for the replication job.

            The Configure cross-bucket replication pane appears.

            • To filter objects to replicate by object name prefix, enter a prefix that you want to include or exclude objects from, then click add Add a prefix.
            • To set a storage class for the replicated objects, select a storage class from the Storage class menu. If you skip this step, the replicated objects will use the destination bucket's storage class by default.
            • Click Done.
   3. In the Choose how to store your data section, do the following:
      1. In the Set a default class section, select the following: Standard.
      2. To enable hierarchical namespace, in the Optimize storage for data-intensive workloads section, select Enable hierarchical namespace on this bucket.
   4. In the Choose how to control access to objects section, select whether or not your bucket enforces public access prevention, and select an access control method for your bucket's objects.
   5. In the Choose how to protect object data section, do the following:
      • Select any of the options under Data protection that you want to set for your bucket.
        • To enable soft delete, click the Soft delete policy (For data recovery) checkbox, and specify the number of days you want to retain objects after deletion.
        • To set Object Versioning, click the Object versioning (For version control) checkbox, and specify the maximum number of versions per object and the number of days after which the noncurrent versions expire.
        • To enable the retention policy on objects and buckets, click the Retention (For compliance) checkbox, and then do the following:
          • To enable Object Retention Lock, click the Enable object retention checkbox.
          • To enable Bucket Lock, click the Set bucket retention policy checkbox, and choose a unit of time and a length of time for your retention period.
      • To choose how your object data will be encrypted, expand the Data encryption section (expand_more), and select a Data encryption method.
4. Click Create.

Faça um pedido ao Cloud Vision

1. Guarde uma versão local do ficheiro de imagem de exemplo (demo-img.jpg).

2. Na Google Cloud consola, aceda à página Recipientes do Cloud Storage.

   Aceda a Recipientes

3. Selecione o contentor que criou na secção anterior.

4. Clique em Carregar ficheiros e selecione a versão local do ficheiro demo-img.jpg para carregar para o seu contentor do Cloud Storage.

   

   Este é o ficheiro de imagem que acabou de carregar:

   

5. Depois de carregar o ficheiro e este aparecer no contentor do Cloud Storage, partilhe a imagem publicamente.

6. Na secção Experimente este método, conclua o modelo interativo do API Explorer substituindo cloud-samples-data/vision no campo image.source.imageUri pelo nome do contentor do Cloud Storage onde carregou o ficheiro demo-img.jpg. O corpo do pedido deve ter o seguinte aspeto:

   {
     "requests": [
       {
         "features": [
           {
             "type": "LABEL_DETECTION"
           }
         ],
         "image": {
           "source": {
             "imageUri": "gs://cloud-samples-data/vision/demo-img.jpg"
           }
         }
       }
     ]
   }

7. Clique em Executar para enviar o pedido ao serviço. A resposta JSON aparece após o corpo do pedido.

Parabéns! Fez o seu primeiro pedido images.annotate ao Cloud Vision.

Limpar

Para evitar Google Cloud cobranças Google Cloud desnecessárias, use a consola para eliminar o contentor do Cloud Storage (e o seu projeto) se não precisar deles.

O que se segue?

• Veja uma lista de todos os tipos de elementos e as respetivas utilizações.
• Comece a usar a Vision API no seu idioma preferencial através de uma biblioteca cliente da Vision API.
• Use os guias de instruções para saber mais sobre funcionalidades específicas, ver exemplos de anotações e obter anotações para um ficheiro ou uma imagem individual.
• Saiba mais sobre a anotação em lote de imagens e ficheiros (PDF/TIFF/GIF).
• Procure numa lista abrangente de exemplos de código da biblioteca cliente.