Detectar etiquetas en una imagen con la API Cloud Vision

Antes de empezar

Si aún no lo has hecho, sigue estas instrucciones para configurar tu proyecto y crear un segmento de Cloud Storage.

Configurar el proyecto

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

Crea un segmento de 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.

Hacer una solicitud a Cloud Vision

1. Guarda una versión local del archivo de imagen de muestra (demo-img.jpg).

2. En la Google Cloud consola, ve a la página Segmentos de Cloud Storage.

   Ir a Contenedores

3. Selecciona el segmento que has creado en la sección anterior.

4. Haz clic en Subir archivos y selecciona la versión local del archivo demo-img.jpg que quieras subir a tu segmento de Cloud Storage.

   

   Este es el archivo de imagen que acabas de subir:

   

5. Una vez que el archivo se haya subido y aparezca en el segmento de Cloud Storage, comparte la imagen públicamente.

6. En la sección Prueba este método, completa la plantilla interactiva del Explorador de APIs. Para ello, sustituye cloud-samples-data/vision en el campo image.source.imageUri por el nombre del segmento de Cloud Storage en el que has subido el archivo demo-img.jpg. El cuerpo de la solicitud debe tener el siguiente aspecto:

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

7. Haz clic en Ejecutar para enviar la solicitud al servicio. La respuesta JSON aparece después del cuerpo de la solicitud.

¡Enhorabuena! Has enviado tu primera solicitud images.annotate a Cloud Vision.

Limpieza

Para evitar que se te cobren cargos innecesarios, usa la consola para eliminar tu segmento de Cloud Storage (y tu proyecto) si no los necesitas. Google Cloud Google Cloud

Siguientes pasos

• Consulta una lista de todos los tipos de funciones y sus usos.
• Empieza a usar la API Vision en el lenguaje que elijas con una biblioteca de cliente de la API Vision.
• Consulta las guías prácticas para obtener más información sobre funciones específicas, ver ejemplos de anotaciones y obtener anotaciones de un archivo o una imagen concretos.
• Consulta información sobre la anotación por lotes de imágenes y archivos (PDF, TIFF o GIF).
• Consulta una lista completa de ejemplos de código de bibliotecas de cliente.