Viewing: cloud.google.com

Note: The Vision API now supports offline asynchronous batch image annotation for all features. This asynchronous request supports up to 2000 image files and returns response JSON files that are stored in your Cloud Storage bucket. For more information about this feature, refer to Offline batch image annotation.

The Vision API can detect and extract multiple objects in an image with Object Localization.

Object localization identifies multiple objects in an image and provides a LocalizedObjectAnnotation for each object in the image. Each LocalizedObjectAnnotation identifies information about the object, the position of the object, and rectangular bounds for the region of the image that contains the object.

Object localization identifies both significant and less-prominent objects in an image.

Object information is returned in English only. The Cloud Translation can translate English labels into various other languages.

[image with bounding boxes] Image credit: Bogdan Dada on Unsplash (annotations added).

For example, the API returns the following information and bounding location data for the objects in the preceding image:

Name	mid	Score	Bounds
Bicycle wheel	/m/01bqk0	0.89648587	(0.32076266, 0.78941387), (0.43812272, 0.78941387), (0.43812272, 0.97331065), (0.32076266, 0.97331065)
Bicycle	/m/0199g	0.886761	(0.312, 0.6616471), (0.638353, 0.6616471), (0.638353, 0.9705882), (0.312, 0.9705882)
Bicycle wheel	/m/01bqk0	0.6345275	(0.5125398, 0.760708), (0.6256646, 0.760708), (0.6256646, 0.94601655), (0.5125398, 0.94601655)
Picture frame	/m/06z37_	0.6207608	(0.79177403, 0.16160682), (0.97047985, 0.16160682), (0.97047985, 0.31348917), (0.79177403, 0.31348917)
Tire	/m/0h9mv	0.55886006	(0.32076266, 0.78941387), (0.43812272, 0.78941387), (0.43812272, 0.97331065), (0.32076266, 0.97331065)
Door	/m/02dgv	0.5160098	(0.77569866, 0.37104446), (0.9412425, 0.37104446), (0.9412425, 0.81507325), (0.77569866, 0.81507325)

mid contains a machine-generated identifier (MID) corresponding to a label's Google Knowledge Graph entry. For information on inspecting mid values, see the Google Knowledge Graph Search API documentation.

Try it for yourself

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

Try Cloud Vision API free

Object Localization requests

Set up your Google Cloud project and authentication

If you have not created a Google Cloud project, do so now. Expand this section for instructions.

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 role (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

Enable the Vision API.

Roles required to enable APIs

To enable APIs, you need the serviceusage.services.enable permission. If you created the project, then you likely already have this permission through the Owner role (roles/owner). Otherwise, you can get this permission through the Service Usage Admin role (roles/serviceusage.serviceUsageAdmin). Learn how to grant roles.

Enable the API

Install the Google Cloud CLI.

If you're using an external identity provider (IdP), you must first sign in to the gcloud CLI with your federated identity.

To initialize the gcloud CLI, run the following command:

gcloud init

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 role (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 Vision API.

Roles required to enable APIs

Enable the API

Install the Google Cloud CLI.

If you're using an external identity provider (IdP), you must first sign in to the gcloud CLI with your federated identity.

To initialize the gcloud CLI, run the following command:

gcloud init

Detect objects in a local image

You can use the Vision API to perform feature detection on a local image file.

For REST requests, send the contents of the image file as a base64 encoded string in the body of your request.

For gcloud and client library requests, specify the path to a local image in your request.

Note: This feature returns results with normalizedVertices [0,1] and not real pixel values (vertices).

REST

Before using any of the request data, make the following replacements:

BASE64_ENCODED_IMAGE: The base64 representation (ASCII string) of your binary image data. This string should look similar to the following string:
- /9j/4QAYRXhpZgAA...9tAVx/zDQDlGxn//2Q==
Visit the base64 encode topic for more information.
RESULTS_INT: (Optional) An integer value of results to return. If you omit the "maxResults" field and its value, the API returns the default value of 10 results. This field does not apply to the following feature types: TEXT_DETECTION, DOCUMENT_TEXT_DETECTION, or CROP_HINTS.
PROJECT_ID: Your Google Cloud project ID.

HTTP method and URL:

POST https://vision.googleapis.com/v1/images:annotate

Request JSON body:

{
  "requests": [
    {
      "image": {
        "content": "BASE64_ENCODED_IMAGE"
      },
      "features": [
        {
          "maxResults": RESULTS_INT,
          "type": "OBJECT_LOCALIZATION"
        },
      ]
    }
  ]
}

To send your request, choose one of these options:

curl

Note: The following command assumes that you have logged in to the gcloud CLI with your user account by running gcloud init or gcloud auth login , or by using Cloud Shell, which automatically logs you into the gcloud CLI . You can check the currently active account by running gcloud auth list.

Save the request body in a file named request.json, and execute the following command:

curl -X POST \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-user-project: PROJECT_ID" \
     -H "Content-Type: application/json; charset=utf-8" \
     -d @request.json \
     "https://vision.googleapis.com/v1/images:annotate"

PowerShell

Note: The following command assumes that you have logged in to the gcloud CLI with your user account by running gcloud init or gcloud auth login . You can check the currently active account by running gcloud auth list.

Save the request body in a file named request.json, and execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_ID" }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://vision.googleapis.com/v1/images:annotate" | Select-Object -Expand Content

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format.

Response:

Note: Zero coordinate values omitted. When the API detects a coordinate ("x" or "y") value of 0, that coordinate is omitted in the JSON response. Thus, a response with a bounding poly around the entire image would be
[{},{"x": 1},{"x": 1,"y": 1},{"y": 1}]. For more information, see the API Reference documentation.

Response

{
  "responses": [
    {
      "localizedObjectAnnotations": [
        {
          "mid": "/m/01bqk0",
          "name": "Bicycle wheel",
          "score": 0.89648587,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.32076266,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.97331065
              },
              {
                "x": 0.32076266,
                "y": 0.97331065
              }
            ]
          }
        },
        {
          "mid": "/m/0199g",
          "name": "Bicycle",
          "score": 0.886761,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.312,
                "y": 0.6616471
              },
              {
                "x": 0.638353,
                "y": 0.6616471
              },
              {
                "x": 0.638353,
                "y": 0.9705882
              },
              {
                "x": 0.312,
                "y": 0.9705882
              }
            ]
          }
        },
        {
          "mid": "/m/01bqk0",
          "name": "Bicycle wheel",
          "score": 0.6345275,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.5125398,
                "y": 0.760708
              },
              {
                "x": 0.6256646,
                "y": 0.760708
              },
              {
                "x": 0.6256646,
                "y": 0.94601655
              },
              {
                "x": 0.5125398,
                "y": 0.94601655
              }
            ]
          }
        },
        {
          "mid": "/m/06z37_",
          "name": "Picture frame",
          "score": 0.6207608,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.79177403,
                "y": 0.16160682
              },
              {
                "x": 0.97047985,
                "y": 0.16160682
              },
              {
                "x": 0.97047985,
                "y": 0.31348917
              },
              {
                "x": 0.79177403,
                "y": 0.31348917
              }
            ]
          }
        },
        {
          "mid": "/m/0h9mv",
          "name": "Tire",
          "score": 0.55886006,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.32076266,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.97331065
              },
              {
                "x": 0.32076266,
                "y": 0.97331065
              }
            ]
          }
        },
        {
          "mid": "/m/02dgv",
          "name": "Door",
          "score": 0.5160098,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.77569866,
                "y": 0.37104446
              },
              {
                "x": 0.9412425,
                "y": 0.37104446
              },
              {
                "x": 0.9412425,
                "y": 0.81507325
              },
              {
                "x": 0.77569866,
                "y": 0.81507325
              }
            ]
          }
        }
      ]
    }
  ]
}

Go

Before trying this sample, follow the Go setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Go API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.


// localizeObjects gets objects and bounding boxes from the Vision API for an image at the given file path.
func localizeObjects(w io.Writer, file string) error {
	ctx := context.Background()

	client, err := vision.NewImageAnnotatorClient(ctx)
	if err != nil {
		return err
	}

	f, err := os.Open(file)
	if err != nil {
		return err
	}
	defer f.Close()

	image, err := vision.NewImageFromReader(f)
	if err != nil {
		return err
	}
	annotations, err := client.LocalizeObjects(ctx, image, nil)
	if err != nil {
		return err
	}

	if len(annotations) == 0 {
		fmt.Fprintln(w, "No objects found.")
		return nil
	}

	fmt.Fprintln(w, "Objects:")
	for _, annotation := range annotations {
		fmt.Fprintln(w, annotation.Name)
		fmt.Fprintln(w, annotation.Score)

		for _, v := range annotation.BoundingPoly.NormalizedVertices {
			fmt.Fprintf(w, "(%f,%f)\n", v.X, v.Y)
		}
	}

	return nil
}

Java

Before trying this sample, follow the Java setup instructions in the Vision API Quickstart Using Client Libraries. For more information, see the Vision API Java reference documentation.

Note: For Java Spring framework users, Spring Cloud Google Cloud offers a way to automatically configure authentication settings and client objects to use Vision API.

/**
 * Detects localized objects in the specified local image.
 *
 * @param filePath The path to the file to perform localized object detection on.
 * @throws Exception on errors while closing the client.
 * @throws IOException on Input/Output errors.
 */
public static void detectLocalizedObjects(String filePath) throws IOException {
  List<AnnotateImageRequest> requests = new ArrayList<>();

  ByteString imgBytes = ByteString.readFrom(new FileInputStream(filePath));

  Image img = Image.newBuilder().setContent(imgBytes).build();
  AnnotateImageRequest request =
      AnnotateImageRequest.newBuilder()
          .addFeatures(Feature.newBuilder().setType(Type.OBJECT_LOCALIZATION))
          .setImage(img)
          .build();
  requests.add(request);

  // Initialize client that will be used to send requests. This client only needs to be created
  // once, and can be reused for multiple requests. After completing all of your requests, call
  // the "close" method on the client to safely clean up any remaining background resources.
  try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {
    // Perform the request
    BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);
    List<AnnotateImageResponse> responses = response.getResponsesList();

    // Display the results
    for (AnnotateImageResponse res : responses) {
      for (LocalizedObjectAnnotation entity : res.getLocalizedObjectAnnotationsList()) {
        System.out.format("Object name: %s%n", entity.getName());
        System.out.format("Confidence: %s%n", entity.getScore());
        System.out.format("Normalized Vertices:%n");
        entity
            .getBoundingPoly()
            .getNormalizedVerticesList()
            .forEach(vertex -> System.out.format("- (%s, %s)%n", vertex.getX(), vertex.getY()));
      }
    }
  }
}

Node.js

Before trying this sample, follow the Node.js setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Node.js API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Imports the Google Cloud client libraries
const vision = require('@google-cloud/vision');
const fs = require('fs');

// Creates a client
const client = new vision.ImageAnnotatorClient();

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
// const fileName = `/path/to/localImage.png`;
const request = {
  image: {content: fs.readFileSync(fileName)},
};

const [result] = await client.objectLocalization(request);
const objects = result.localizedObjectAnnotations;
objects.forEach(object => {
  console.log(`Name: ${object.name}`);
  console.log(`Confidence: ${object.score}`);
  const vertices = object.boundingPoly.normalizedVertices;
  vertices.forEach(v => console.log(`x: ${v.x}, y:${v.y}`));
});

Python

Before trying this sample, follow the Python setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Python API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

def localize_objects(path):
    """Localize objects in the local image.

    Args:
    path: The path to the local file.
    """
    from google.cloud import vision

    client = vision.ImageAnnotatorClient()

    with open(path, "rb") as image_file:
        content = image_file.read()
    image = vision.Image(content=content)

    objects = client.object_localization(image=image).localized_object_annotations

    print(f"Number of objects found: {len(objects)}")
    for object_ in objects:
        print(f"\n{object_.name} (confidence: {object_.score})")
        print("Normalized bounding polygon vertices: ")
        for vertex in object_.bounding_poly.normalized_vertices:
            print(f" - ({vertex.x}, {vertex.y})")

Additional languages

C#: Please follow the C# setup instructions on the client libraries page and then visit the Vision reference documentation for .NET.

PHP: Please follow the PHP setup instructions on the client libraries page and then visit the Vision reference documentation for PHP.

Ruby: Please follow the Ruby setup instructions on the client libraries page and then visit the Vision reference documentation for Ruby.

Detect objects in a remote image

You can use the Vision API to perform feature detection on a remote image file that is located in Cloud Storage or on the Web. To send a remote file request, specify the file's Web URL or Cloud Storage URI in the request body.

Note: This feature returns results with normalizedVertices [0,1] and not real pixel values (vertices).

Caution: When fetching images from HTTP/HTTPS URLs, Google cannot guarantee that the request will be completed. Your request might fail if the specified host denies the request (for example, due to request throttling or DoS prevention), or if Google throttles requests to the site for abuse prevention. As a best practice, don't depend on externally-hosted images for production applications.

REST

Before using any of the request data, make the following replacements:

CLOUD_STORAGE_IMAGE_URI: the path to a valid image file in a Cloud Storage bucket. You must at least have read privileges to the file. Example:
- ```
https://cloud.google.com/vision/docs/images/bicycle_example.png
```
RESULTS_INT: (Optional) An integer value of results to return. If you omit the "maxResults" field and its value, the API returns the default value of 10 results. This field does not apply to the following feature types: TEXT_DETECTION, DOCUMENT_TEXT_DETECTION, or CROP_HINTS.
PROJECT_ID: Your Google Cloud project ID.

HTTP method and URL:

POST https://vision.googleapis.com/v1/images:annotate

Request JSON body:

{
  "requests": [
    {
      "image": {
        "source": {
          "imageUri": "CLOUD_STORAGE_IMAGE_URI"
        }
      },
      "features": [
        {
          "maxResults": RESULTS_INT,
          "type": "OBJECT_LOCALIZATION"
        },
      ]
    }
  ]
}

To send your request, choose one of these options:

curl

Save the request body in a file named request.json, and execute the following command:

curl -X POST \
     -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-user-project: PROJECT_ID" \
     -H "Content-Type: application/json; charset=utf-8" \
     -d @request.json \
     "https://vision.googleapis.com/v1/images:annotate"

PowerShell

Save the request body in a file named request.json, and execute the following command:

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred"; "x-goog-user-project" = "PROJECT_ID" }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://vision.googleapis.com/v1/images:annotate" | Select-Object -Expand Content

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format.

Response:

Response

{
  "responses": [
    {
      "localizedObjectAnnotations": [
        {
          "mid": "/m/01bqk0",
          "name": "Bicycle wheel",
          "score": 0.89648587,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.32076266,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.97331065
              },
              {
                "x": 0.32076266,
                "y": 0.97331065
              }
            ]
          }
        },
        {
          "mid": "/m/0199g",
          "name": "Bicycle",
          "score": 0.886761,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.312,
                "y": 0.6616471
              },
              {
                "x": 0.638353,
                "y": 0.6616471
              },
              {
                "x": 0.638353,
                "y": 0.9705882
              },
              {
                "x": 0.312,
                "y": 0.9705882
              }
            ]
          }
        },
        {
          "mid": "/m/01bqk0",
          "name": "Bicycle wheel",
          "score": 0.6345275,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.5125398,
                "y": 0.760708
              },
              {
                "x": 0.6256646,
                "y": 0.760708
              },
              {
                "x": 0.6256646,
                "y": 0.94601655
              },
              {
                "x": 0.5125398,
                "y": 0.94601655
              }
            ]
          }
        },
        {
          "mid": "/m/06z37_",
          "name": "Picture frame",
          "score": 0.6207608,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.79177403,
                "y": 0.16160682
              },
              {
                "x": 0.97047985,
                "y": 0.16160682
              },
              {
                "x": 0.97047985,
                "y": 0.31348917
              },
              {
                "x": 0.79177403,
                "y": 0.31348917
              }
            ]
          }
        },
        {
          "mid": "/m/0h9mv",
          "name": "Tire",
          "score": 0.55886006,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.32076266,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.78941387
              },
              {
                "x": 0.43812272,
                "y": 0.97331065
              },
              {
                "x": 0.32076266,
                "y": 0.97331065
              }
            ]
          }
        },
        {
          "mid": "/m/02dgv",
          "name": "Door",
          "score": 0.5160098,
          "boundingPoly": {
            "normalizedVertices": [
              {
                "x": 0.77569866,
                "y": 0.37104446
              },
              {
                "x": 0.9412425,
                "y": 0.37104446
              },
              {
                "x": 0.9412425,
                "y": 0.81507325
              },
              {
                "x": 0.77569866,
                "y": 0.81507325
              }
            ]
          }
        }
      ]
    }
  ]
}

Go

Before trying this sample, follow the Go setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Go API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.


// localizeObjects gets objects and bounding boxes from the Vision API for an image at the given file path.
func localizeObjectsURI(w io.Writer, file string) error {
	ctx := context.Background()

	client, err := vision.NewImageAnnotatorClient(ctx)
	if err != nil {
		return err
	}

	image := vision.NewImageFromURI(file)
	annotations, err := client.LocalizeObjects(ctx, image, nil)
	if err != nil {
		return err
	}

	if len(annotations) == 0 {
		fmt.Fprintln(w, "No objects found.")
		return nil
	}

	fmt.Fprintln(w, "Objects:")
	for _, annotation := range annotations {
		fmt.Fprintln(w, annotation.Name)
		fmt.Fprintln(w, annotation.Score)

		for _, v := range annotation.BoundingPoly.NormalizedVertices {
			fmt.Fprintf(w, "(%f,%f)\n", v.X, v.Y)
		}
	}

	return nil
}

Java

Before trying this sample, follow the Java setup instructions in the Vision API Quickstart Using Client Libraries. For more information, see the Vision API Java reference documentation.

Note: For Java Spring framework users, Spring Cloud Google Cloud offers a way to automatically configure authentication settings and client objects to use Vision API.

/**
 * Detects localized objects in a remote image on Google Cloud Storage.
 *
 * @param gcsPath The path to the remote file on Google Cloud Storage to detect localized objects
 *     on.
 * @throws Exception on errors while closing the client.
 * @throws IOException on Input/Output errors.
 */
public static void detectLocalizedObjectsGcs(String gcsPath) throws IOException {
  List<AnnotateImageRequest> requests = new ArrayList<>();

  ImageSource imgSource = ImageSource.newBuilder().setGcsImageUri(gcsPath).build();
  Image img = Image.newBuilder().setSource(imgSource).build();

  AnnotateImageRequest request =
      AnnotateImageRequest.newBuilder()
          .addFeatures(Feature.newBuilder().setType(Type.OBJECT_LOCALIZATION))
          .setImage(img)
          .build();
  requests.add(request);

  // Initialize client that will be used to send requests. This client only needs to be created
  // once, and can be reused for multiple requests. After completing all of your requests, call
  // the "close" method on the client to safely clean up any remaining background resources.
  try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {
    // Perform the request
    BatchAnnotateImagesResponse response = client.batchAnnotateImages(requests);
    List<AnnotateImageResponse> responses = response.getResponsesList();
    client.close();
    // Display the results
    for (AnnotateImageResponse res : responses) {
      for (LocalizedObjectAnnotation entity : res.getLocalizedObjectAnnotationsList()) {
        System.out.format("Object name: %s%n", entity.getName());
        System.out.format("Confidence: %s%n", entity.getScore());
        System.out.format("Normalized Vertices:%n");
        entity
            .getBoundingPoly()
            .getNormalizedVerticesList()
            .forEach(vertex -> System.out.format("- (%s, %s)%n", vertex.getX(), vertex.getY()));
      }
    }
  }
}

Node.js

Before trying this sample, follow the Node.js setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Node.js API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Imports the Google Cloud client libraries
const vision = require('@google-cloud/vision');

// Creates a client
const client = new vision.ImageAnnotatorClient();

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
// const gcsUri = `gs://bucket/bucketImage.png`;

const [result] = await client.objectLocalization(gcsUri);
const objects = result.localizedObjectAnnotations;
objects.forEach(object => {
  console.log(`Name: ${object.name}`);
  console.log(`Confidence: ${object.score}`);
  const veritices = object.boundingPoly.normalizedVertices;
  veritices.forEach(v => console.log(`x: ${v.x}, y:${v.y}`));
});

Python

Before trying this sample, follow the Python setup instructions in the Vision quickstart using client libraries. For more information, see the Vision Python API reference documentation.

To authenticate to Vision, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

def localize_objects_uri(uri):
    """Localize objects in the image on Google Cloud Storage

    Args:
    uri: The path to the file in Google Cloud Storage (gs://...)
    """
    from google.cloud import vision

    client = vision.ImageAnnotatorClient()

    image = vision.Image()
    image.source.image_uri = uri

    objects = client.object_localization(image=image).localized_object_annotations

    print(f"Number of objects found: {len(objects)}")
    for object_ in objects:
        print(f"\n{object_.name} (confidence: {object_.score})")
        print("Normalized bounding polygon vertices: ")
        for vertex in object_.bounding_poly.normalized_vertices:
            print(f" - ({vertex.x}, {vertex.y})")

gcloud

To detect labels in an image, use the gcloud ml vision detect-objects command as shown in the following example:

gcloud ml vision detect-objects https://cloud.google.com/vision/docs/images/bicycle_example.png

Additional languages

C#: Please follow the C# setup instructions on the client libraries page and then visit the Vision reference documentation for .NET.

PHP: Please follow the PHP setup instructions on the client libraries page and then visit the Vision reference documentation for PHP.

Ruby: Please follow the Ruby setup instructions on the client libraries page and then visit the Vision reference documentation for Ruby.

Try the feature with the Google APIs Explorer

Try object detection and localization with the Google APIs Explorer. You can use the image specified already (https://cloud.google.com/vision/docs/images/bicycle_example.png) or specify your own image in its place. Send the request by selecting Execute.

[image without bounding boxes] Image credit: Bogdan Dada on Unsplash.

Request body:

{
  "requests": [
    {
      "features": [
        {
          "maxResults": 10,
          "type": "OBJECT_LOCALIZATION"
        }
      ],
      "image": {
        "source": {
          "imageUri": "https://cloud.google.com/vision/docs/images/bicycle_example.png"
        }
      }
    }
  ]
}

Open the Google APIs Explorer and send the request

To open the Google APIs Explorer, click Try it!.

Try it!
Optional. Modify the existing request body.
To send the request, click Execute.

Detect multiple objects Stay organized with collections Save and categorize content based on your preferences.

Try it for yourself

Object Localization requests

Set up your Google Cloud project and authentication

Detect objects in a local image

REST

curl

PowerShell

Response

Go

Java

Node.js

Python

Additional languages

Detect objects in a remote image

REST

curl

PowerShell

Response

Go

Java

Node.js

Python

gcloud

Additional languages

Try the feature with the Google APIs Explorer

Open the Google APIs Explorer and send the request

Products and pricing

Support

Resources

Engage