오프라인 상태에서 Cloud Storage의 이미지 파일 배치에 주석을 추가합니다.
코드 샘플
Java
이 샘플을 사용해 보기 전에 Vision 빠른 시작: 클라이언트 라이브러리 사용의 Java 설정 안내를 따르세요. 자세한 내용은 Vision Java API 참고 문서를 참조하세요.
Vision에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.
import com.google.api.gax.longrunning.OperationFuture;
import com.google.api.gax.paging.Page;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.Storage.BlobListOption;
import com.google.cloud.storage.StorageOptions;
import com.google.cloud.vision.v1p4beta1.AnnotateImageRequest;
import com.google.cloud.vision.v1p4beta1.AsyncBatchAnnotateImagesRequest;
import com.google.cloud.vision.v1p4beta1.AsyncBatchAnnotateImagesResponse;
import com.google.cloud.vision.v1p4beta1.BatchAnnotateImagesResponse;
import com.google.cloud.vision.v1p4beta1.BatchAnnotateImagesResponse.Builder;
import com.google.cloud.vision.v1p4beta1.Feature;
import com.google.cloud.vision.v1p4beta1.Feature.Type;
import com.google.cloud.vision.v1p4beta1.GcsDestination;
import com.google.cloud.vision.v1p4beta1.Image;
import com.google.cloud.vision.v1p4beta1.ImageAnnotatorClient;
import com.google.cloud.vision.v1p4beta1.ImageSource;
import com.google.cloud.vision.v1p4beta1.OperationMetadata;
import com.google.cloud.vision.v1p4beta1.OutputConfig;
import com.google.protobuf.util.JsonFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class AsyncBatchAnnotateImagesGcs {
// Performs asynchronous batch annotation of images on Google Cloud Storage
public static void asyncBatchAnnotateImagesGcs(String gcsSourcePath, String gcsDestinationPath)
throws Exception {
// String gcsSourcePath = "gs://YOUR_BUCKET_ID/path_to_your_data";
// String gcsDestinationPath = "gs://YOUR_BUCKET_ID/path_to_store_annotation";
try (ImageAnnotatorClient client = ImageAnnotatorClient.create()) {
List<AnnotateImageRequest> requests = new ArrayList<>();
ImageSource imgSource = ImageSource.newBuilder().setImageUri(gcsSourcePath).build();
Image image = Image.newBuilder().setSource(imgSource).build();
// Set the GCS destination path for where to save the results.
GcsDestination gcsDestination =
GcsDestination.newBuilder().setUri(gcsDestinationPath).build();
// Create the configuration for the output with the batch size.
// The batch size sets how many pages should be grouped into each json output file.
OutputConfig outputConfig =
OutputConfig.newBuilder().setGcsDestination(gcsDestination).setBatchSize(2).build();
// Select the Features required by the vision API
Feature features =
Feature.newBuilder()
.setType(Type.LABEL_DETECTION)
.setType(Type.TEXT_DETECTION)
.setType(Type.IMAGE_PROPERTIES)
.build();
// Build the request
AnnotateImageRequest annotateImageRequest =
AnnotateImageRequest.newBuilder().setImage(image).addFeatures(features).build();
requests.add(annotateImageRequest);
AsyncBatchAnnotateImagesRequest request =
AsyncBatchAnnotateImagesRequest.newBuilder()
.addAllRequests(requests)
.setOutputConfig(outputConfig)
.build();
OperationFuture<AsyncBatchAnnotateImagesResponse, OperationMetadata> response =
client.asyncBatchAnnotateImagesAsync(request);
System.out.println("Waiting for the operation to finish.");
// we're not processing the response, since we'll be reading the output from GCS.
response.get(180, TimeUnit.SECONDS);
// Once the request has completed and the output has been
// written to GCS, we can list all the output files.
Storage storage = StorageOptions.getDefaultInstance().getService();
// Get the destination location from the gcsDestinationPath
Pattern pattern = Pattern.compile("gs://([^/]+)/(.+)");
Matcher matcher = pattern.matcher(gcsDestinationPath);
if (matcher.find()) {
String bucketName = matcher.group(1);
String prefix = matcher.group(2);
// Get the list of objects with the given prefix from the GCS bucket
Bucket bucket = storage.get(bucketName);
Page<Blob> pageList = bucket.list(BlobListOption.prefix(prefix));
Blob firstOutputFile = null;
// List objects with the given prefix.
System.out.println("Output files:");
for (Blob blob : pageList.iterateAll()) {
System.out.println(blob.getName());
// Process the first output file from GCS.
// Since we specified batch size = 2, the first response contains
// the first two image requests
if (firstOutputFile == null) {
firstOutputFile = blob;
}
}
// Get the contents of the file and convert the JSON contents to an
// BatchAnnotateImagesResponse
// object. If the Blob is small read all its content in one request
// (Note: the file is a .json file)
// Storage guide: https://cloud.google.com/storage/docs/downloading-objects
String jsonContents = new String(firstOutputFile.getContent());
Builder builder = BatchAnnotateImagesResponse.newBuilder();
JsonFormat.parser().merge(jsonContents, builder);
// Build the AnnotateFileResponse object
BatchAnnotateImagesResponse batchAnnotateImagesResponse = builder.build();
// Here we print the response for the first image
// The response contains more information:
// annotation/pages/blocks/paragraphs/words/symbols/colors
// including confidence score and bounding boxes
System.out.format("\nResponse: %s\n", batchAnnotateImagesResponse.getResponses(0));
} else {
System.out.println("No MATCH");
}
} catch (Exception e) {
System.out.println("Error during asyncBatchAnnotateImagesGcs: \n" + e.toString());
}
}
}
Python
이 샘플을 사용해 보기 전에 Vision 빠른 시작: 클라이언트 라이브러리 사용의 Python 설정 안내를 따르세요. 자세한 내용은 Vision Python API 참고 문서를 참조하세요.
Vision에 인증하려면 애플리케이션 기본 사용자 인증 정보를 설정합니다. 자세한 내용은 로컬 개발 환경의 인증 설정을 참조하세요.
def async_batch_annotate_images_uri(input_image_uri, output_uri):
"""Batch annotation of images on Google Cloud Storage asynchronously.
Args:
input_image_uri: The path to the image in Google Cloud Storage (gs://...)
output_uri: The path to the output path in Google Cloud Storage (gs://...)
"""
import re
from google.cloud import storage
from google.cloud import vision_v1p4beta1 as vision
client = vision.ImageAnnotatorClient()
# Construct the request for the image(s) to be annotated:
image_source = vision.ImageSource(image_uri=input_image_uri)
image = vision.Image(source=image_source)
features = [
vision.Feature(type_=vision.Feature.Type.LABEL_DETECTION),
vision.Feature(type_=vision.Feature.Type.TEXT_DETECTION),
vision.Feature(type_=vision.Feature.Type.IMAGE_PROPERTIES),
]
requests = [
vision.AnnotateImageRequest(image=image, features=features),
]
gcs_destination = vision.GcsDestination(uri=output_uri)
output_config = vision.OutputConfig(gcs_destination=gcs_destination, batch_size=2)
operation = client.async_batch_annotate_images(
requests=requests, output_config=output_config
)
print("Waiting for the operation to finish.")
operation.result(timeout=10000)
# Once the request has completed and the output has been
# written to Google Cloud Storage, we can list all the output files.
storage_client = storage.Client()
match = re.match(r"gs://([^/]+)/(.+)", output_uri)
bucket_name = match.group(1)
prefix = match.group(2)
bucket = storage_client.get_bucket(bucket_name)
# Lists objects with the given prefix.
blob_list = list(bucket.list_blobs(prefix=prefix))
print("Output files:")
for blob in blob_list:
print(blob.name)
# Processes the first output file from Google Cloud Storage.
# Since we specified batch_size=2, the first response contains
# annotations for the first two annotate image requests.
output = blob_list[0]
json_string = output.download_as_bytes().decode("utf-8")
response = vision.BatchAnnotateImagesResponse.from_json(json_string)
# Prints the actual response for the first annotate image request.
print(
"The annotation response for the first request: {}".format(
response.responses[0]
)
)
다음 단계
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