Prédiction

Prédiction

En savoir plus

Pour obtenir une documentation détaillée incluant cet exemple de code, consultez la page suivante :

Exemple de code

Go

Pour savoir comment installer et utiliser la bibliothèque cliente pour AutoML Vision Object Detection, consultez la page Bibliothèques clientes AutoML Vision Object Detection. Pour en savoir plus, consultez la documentation de référence de l'API Go AutoML Vision Object Detection en langage.

Pour vous authentifier auprès d'AutoML Vision Object Detection, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local. 

import (
	"context"
	"fmt"
	"io"
	"io/ioutil"
	"os"

	automl "cloud.google.com/go/automl/apiv1"
	"cloud.google.com/go/automl/apiv1/automlpb"
)

// visionObjectDetectionPredict does a prediction for image classification.
func visionObjectDetectionPredict(w io.Writer, projectID string, location string, modelID string, filePath string) error {
	// projectID := "my-project-id"
	// location := "us-central1"
	// modelID := "IOD123456789..."
	// filePath := "path/to/image.jpg"

	ctx := context.Background()
	client, err := automl.NewPredictionClient(ctx)
	if err != nil {
		return fmt.Errorf("NewPredictionClient: %w", err)
	}
	defer client.Close()

	file, err := os.Open(filePath)
	if err != nil {
		return fmt.Errorf("Open: %w", err)
	}
	defer file.Close()
	bytes, err := ioutil.ReadAll(file)
	if err != nil {
		return fmt.Errorf("ReadAll: %w", err)
	}

	req := &automlpb.PredictRequest{
		Name: fmt.Sprintf("projects/%s/locations/%s/models/%s", projectID, location, modelID),
		Payload: &automlpb.ExamplePayload{
			Payload: &automlpb.ExamplePayload_Image{
				Image: &automlpb.Image{
					Data: &automlpb.Image_ImageBytes{
						ImageBytes: bytes,
					},
				},
			},
		},
		// Params is additional domain-specific parameters.
		Params: map[string]string{
			// score_threshold is used to filter the result.
			"score_threshold": "0.8",
		},
	}

	resp, err := client.Predict(ctx, req)
	if err != nil {
		return fmt.Errorf("Predict: %w", err)
	}

	for _, payload := range resp.GetPayload() {
		fmt.Fprintf(w, "Predicted class name: %v\n", payload.GetDisplayName())
		fmt.Fprintf(w, "Predicted class score: %v\n", payload.GetImageObjectDetection().GetScore())
		boundingBox := payload.GetImageObjectDetection().GetBoundingBox()
		fmt.Fprintf(w, "Normalized vertices:\n")
		for _, vertex := range boundingBox.GetNormalizedVertices() {
			fmt.Fprintf(w, "\tX: %v, Y: %v\n", vertex.GetX(), vertex.GetY())
		}
	}

	return nil
}

Java

Pour savoir comment installer et utiliser la bibliothèque cliente pour AutoML Vision Object Detection, consultez la page Bibliothèques clientes AutoML Vision Object Detection. Pour en savoir plus, consultez la documentation de référence de l'API Java AutoML Vision Object Detection en langage.

Pour vous authentifier auprès d'AutoML Vision Object Detection, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local. 

import com.google.cloud.automl.v1.AnnotationPayload;
import com.google.cloud.automl.v1.BoundingPoly;
import com.google.cloud.automl.v1.ExamplePayload;
import com.google.cloud.automl.v1.Image;
import com.google.cloud.automl.v1.ModelName;
import com.google.cloud.automl.v1.NormalizedVertex;
import com.google.cloud.automl.v1.PredictRequest;
import com.google.cloud.automl.v1.PredictResponse;
import com.google.cloud.automl.v1.PredictionServiceClient;
import com.google.protobuf.ByteString;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

class VisionObjectDetectionPredict {

  static void predict() throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "YOUR_PROJECT_ID";
    String modelId = "YOUR_MODEL_ID";
    String filePath = "path_to_local_file.jpg";
    predict(projectId, modelId, filePath);
  }

  static void predict(String projectId, String modelId, String filePath) throws IOException {
    // 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 (PredictionServiceClient client = PredictionServiceClient.create()) {
      // Get the full path of the model.
      ModelName name = ModelName.of(projectId, "us-central1", modelId);
      ByteString content = ByteString.copyFrom(Files.readAllBytes(Paths.get(filePath)));
      Image image = Image.newBuilder().setImageBytes(content).build();
      ExamplePayload payload = ExamplePayload.newBuilder().setImage(image).build();
      PredictRequest predictRequest =
          PredictRequest.newBuilder()
              .setName(name.toString())
              .setPayload(payload)
              .putParams(
                  "score_threshold", "0.5") // [0.0-1.0] Only produce results higher than this value
              .build();

      PredictResponse response = client.predict(predictRequest);
      for (AnnotationPayload annotationPayload : response.getPayloadList()) {
        System.out.format("Predicted class name: %s\n", annotationPayload.getDisplayName());
        System.out.format(
            "Predicted class score: %.2f\n",
            annotationPayload.getImageObjectDetection().getScore());
        BoundingPoly boundingPoly = annotationPayload.getImageObjectDetection().getBoundingBox();
        System.out.println("Normalized Vertices:");
        for (NormalizedVertex vertex : boundingPoly.getNormalizedVerticesList()) {
          System.out.format("\tX: %.2f, Y: %.2f\n", vertex.getX(), vertex.getY());
        }
      }
    }
  }
}

Node.js

Pour savoir comment installer et utiliser la bibliothèque cliente pour AutoML Vision Object Detection, consultez la page Bibliothèques clientes AutoML Vision Object Detection. Pour en savoir plus, consultez la documentation de référence de l'API Node.js AutoML Vision Object Detection en langage.

Pour vous authentifier auprès d'AutoML Vision Object Detection, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local. 

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const location = 'us-central1';
// const modelId = 'YOUR_MODEL_ID';
// const filePath = 'path_to_local_file.jpg';

// Imports the Google Cloud AutoML library
const {PredictionServiceClient} = require('@google-cloud/automl').v1;
const fs = require('fs');

// Instantiates a client
const client = new PredictionServiceClient();

// Read the file content for translation.
const content = fs.readFileSync(filePath);

async function predict() {
  // Construct request
  // params is additional domain-specific parameters.
  // score_threshold is used to filter the result
  const request = {
    name: client.modelPath(projectId, location, modelId),
    payload: {
      image: {
        imageBytes: content,
      },
    },
    params: {
      score_threshold: '0.8',
    },
  };

  const [response] = await client.predict(request);

  for (const annotationPayload of response.payload) {
    console.log(`Predicted class name: ${annotationPayload.displayName}`);
    console.log(
      `Predicted class score: ${annotationPayload.imageObjectDetection.score}`
    );
    console.log('Normalized vertices:');
    for (const vertex of annotationPayload.imageObjectDetection.boundingBox
      .normalizedVertices) {
      console.log(`\tX: ${vertex.x}, Y: ${vertex.y}`);
    }
  }
}

predict();

Python

Pour savoir comment installer et utiliser la bibliothèque cliente pour AutoML Vision Object Detection, consultez la page Bibliothèques clientes AutoML Vision Object Detection. Pour en savoir plus, consultez la documentation de référence de l'API Python AutoML Vision Object Detection en langage.

Pour vous authentifier auprès d'AutoML Vision Object Detection, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local. 

from google.cloud import automl

# TODO(developer): Uncomment and set the following variables
# project_id = "YOUR_PROJECT_ID"
# model_id = "YOUR_MODEL_ID"
# file_path = "path_to_local_file.jpg"

prediction_client = automl.PredictionServiceClient()

# Get the full path of the model.
model_full_id = automl.AutoMlClient.model_path(project_id, "us-central1", model_id)

# Read the file.
with open(file_path, "rb") as content_file:
    content = content_file.read()

image = automl.Image(image_bytes=content)
payload = automl.ExamplePayload(image=image)

# params is additional domain-specific parameters.
# score_threshold is used to filter the result
# https://cloud.google.com/automl/docs/reference/rpc/google.cloud.automl.v1#predictrequest
params = {"score_threshold": "0.8"}

request = automl.PredictRequest(name=model_full_id, payload=payload, params=params)

response = prediction_client.predict(request=request)
print("Prediction results:")
for result in response.payload:
    print(f"Predicted class name: {result.display_name}")
    print(f"Predicted class score: {result.image_object_detection.score}")
    bounding_box = result.image_object_detection.bounding_box
    print("Normalized Vertices:")
    for vertex in bounding_box.normalized_vertices:
        print(f"\tX: {vertex.x}, Y: {vertex.y}")

Étapes suivantes

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