Class: Google::Cloud::Vision::V1::ImageAnnotatorClient

Inherits:
Object
  • Object
show all
Defined in:
lib/google/cloud/vision/v1/image_annotator_client.rb

Overview

Service that performs Google Cloud Vision API detection tasks over client images, such as face, landmark, logo, label, and text detection. The ImageAnnotator service returns detected entities from the images.

Constant Summary collapse

SERVICE_ADDRESS =

The default address of the service.

"vision.googleapis.com".freeze
DEFAULT_SERVICE_PORT =

The default port of the service.

443
GRPC_INTERCEPTORS =

The default set of gRPC interceptors.

[]
DEFAULT_TIMEOUT = 
30
ALL_SCOPES =

The scopes needed to make gRPC calls to all of the methods defined in this service.

[
  "https://www.googleapis.com/auth/cloud-platform",
  "https://www.googleapis.com/auth/cloud-vision"
].freeze

Instance Method Summary collapse

Constructor Details

#initialize(credentials: nil, scopes: ALL_SCOPES, client_config: {}, timeout: DEFAULT_TIMEOUT, metadata: nil, exception_transformer: nil, lib_name: nil, lib_version: "") ⇒ ImageAnnotatorClient

Returns a new instance of ImageAnnotatorClient

Parameters:

  • credentials (Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc) —

    Provides the means for authenticating requests made by the client. This parameter can be many types. A Google::Auth::Credentials uses a the properties of its represented keyfile for authenticating requests made by this client. A String will be treated as the path to the keyfile to be used for the construction of credentials for this client. A Hash will be treated as the contents of a keyfile to be used for the construction of credentials for this client. A GRPC::Core::Channel will be used to make calls through. A GRPC::Core::ChannelCredentials for the setting up the RPC client. The channel credentials should already be composed with a GRPC::Core::CallCredentials object. A Proc will be used as an updater_proc for the Grpc channel. The proc transforms the metadata for requests, generally, to give OAuth credentials.

  • scopes (Array<String>) —

    The OAuth scopes for this service. This parameter is ignored if an updater_proc is supplied.

  • client_config (Hash) —

    A Hash for call options for each method. See Google::Gax#construct_settings for the structure of this data. Falls back to the default config if not specified or the specified config is missing data points.

  • timeout (Numeric) —

    The default timeout, in seconds, for calls made through this client.

  • metadata (Hash) —

    Default metadata to be sent with each request. This can be overridden on a per call basis.

  • exception_transformer (Proc) —

    An optional proc that intercepts any exceptions raised during an API call to inject custom error handling.



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# File 'lib/google/cloud/vision/v1/image_annotator_client.rb', line 99

def initialize \
    credentials: nil,
    scopes: ALL_SCOPES,
    client_config: {},
    timeout: DEFAULT_TIMEOUT,
    metadata: nil,
    exception_transformer: nil,
    lib_name: nil,
    lib_version: ""
  # These require statements are intentionally placed here to initialize
  # the gRPC module only when it's required.
  # See https://github.com/googleapis/toolkit/issues/446
  require "google/gax/grpc"
  require "google/cloud/vision/v1/image_annotator_services_pb"

  credentials ||= Google::Cloud::Vision::V1::Credentials.default

  @operations_client = OperationsClient.new(
    credentials: credentials,
    scopes: scopes,
    client_config: client_config,
    timeout: timeout,
    lib_name: lib_name,
    lib_version: lib_version,
  )

  if credentials.is_a?(String) || credentials.is_a?(Hash)
    updater_proc = Google::Cloud::Vision::V1::Credentials.new(credentials).updater_proc
  end
  if credentials.is_a?(GRPC::Core::Channel)
    channel = credentials
  end
  if credentials.is_a?(GRPC::Core::ChannelCredentials)
    chan_creds = credentials
  end
  if credentials.is_a?(Proc)
    updater_proc = credentials
  end
  if credentials.is_a?(Google::Auth::Credentials)
    updater_proc = credentials.updater_proc
  end

  package_version = Gem.loaded_specs['google-cloud-vision'].version.version

  google_api_client = "gl-ruby/#{RUBY_VERSION}"
  google_api_client << " #{lib_name}/#{lib_version}" if lib_name
  google_api_client << " gapic/#{package_version} gax/#{Google::Gax::VERSION}"
  google_api_client << " grpc/#{GRPC::VERSION}"
  google_api_client.freeze

  headers = { :"x-goog-api-client" => google_api_client }
  headers.merge!(metadata) unless metadata.nil?
  client_config_file = Pathname.new(__dir__).join(
    "image_annotator_client_config.json"
  )
  defaults = client_config_file.open do |f|
    Google::Gax.construct_settings(
      "google.cloud.vision.v1.ImageAnnotator",
      JSON.parse(f.read),
      client_config,
      Google::Gax::Grpc::STATUS_CODE_NAMES,
      timeout,
      errors: Google::Gax::Grpc::API_ERRORS,
      metadata: headers
    )
  end

  # Allow overriding the service path/port in subclasses.
  service_path = self.class::SERVICE_ADDRESS
  port = self.class::DEFAULT_SERVICE_PORT
  interceptors = self.class::GRPC_INTERCEPTORS
  @image_annotator_stub = Google::Gax::Grpc.create_stub(
    service_path,
    port,
    chan_creds: chan_creds,
    channel: channel,
    updater_proc: updater_proc,
    scopes: scopes,
    interceptors: interceptors,
    &Google::Cloud::Vision::V1::ImageAnnotator::Stub.method(:new)
  )

  @batch_annotate_images = Google::Gax.create_api_call(
    @image_annotator_stub.method(:batch_annotate_images),
    defaults["batch_annotate_images"],
    exception_transformer: exception_transformer
  )
  @async_batch_annotate_files = Google::Gax.create_api_call(
    @image_annotator_stub.method(:async_batch_annotate_files),
    defaults["async_batch_annotate_files"],
    exception_transformer: exception_transformer
  )
end

Instance Method Details

#async_batch_annotate_files(requests, options: nil) ⇒ Google::Gax::Operation

Run asynchronous image detection and annotation for a list of generic files, such as PDF files, which may contain multiple pages and multiple images per page. Progress and results can be retrieved through the +google.longrunning.Operations+ interface. +Operation.metadata+ contains +OperationMetadata+ (metadata). +Operation.response+ contains +AsyncBatchAnnotateFilesResponse+ (results).

Examples:

require "google/cloud/vision/v1"

image_annotator_client = Google::Cloud::Vision::V1.new

# TODO: Initialize +requests+:
requests = []

# Register a callback during the method call.
operation = image_annotator_client.async_batch_annotate_files(requests) do |op|
  raise op.results.message if op.error?
  op_results = op.results
  # Process the results.

  metadata = op.metadata
  # Process the metadata.
end

# Or use the return value to register a callback.
operation.on_done do |op|
  raise op.results.message if op.error?
  op_results = op.results
  # Process the results.

  metadata = op.metadata
  # Process the metadata.
end

# Manually reload the operation.
operation.reload!

# Or block until the operation completes, triggering callbacks on
# completion.
operation.wait_until_done!

Parameters:

  • requests (Array<Google::Cloud::Vision::V1::AsyncAnnotateFileRequest | Hash>) —

    Individual async file annotation requests for this batch. A hash of the same form as Google::Cloud::Vision::V1::AsyncAnnotateFileRequest can also be provided.

  • options (Google::Gax::CallOptions) —

    Overrides the default settings for this call, e.g, timeout, retries, etc.

Returns:

  • (Google::Gax::Operation)

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/vision/v1/image_annotator_client.rb', line 280

def async_batch_annotate_files \
    requests,
    options: nil
  req = {
    requests: requests
  }.delete_if { |_, v| v.nil? }
  req = Google::Gax::to_proto(req, Google::Cloud::Vision::V1::AsyncBatchAnnotateFilesRequest)
  operation = Google::Gax::Operation.new(
    @async_batch_annotate_files.call(req, options),
    @operations_client,
    Google::Cloud::Vision::V1::AsyncBatchAnnotateFilesResponse,
    Google::Cloud::Vision::V1::OperationMetadata,
    call_options: options
  )
  operation.on_done { |operation| yield(operation) } if block_given?
  operation
end

#batch_annotate_images(requests, options: nil) {|result, operation| ... } ⇒ Google::Cloud::Vision::V1::BatchAnnotateImagesResponse

Run image detection and annotation for a batch of images.

Examples:

require "google/cloud/vision/v1"

image_annotator_client = Google::Cloud::Vision::V1.new

# TODO: Initialize +requests+:
requests = []
response = image_annotator_client.batch_annotate_images(requests)

Parameters:

  • requests (Array<Google::Cloud::Vision::V1::AnnotateImageRequest | Hash>) —

    Individual image annotation requests for this batch. A hash of the same form as Google::Cloud::Vision::V1::AnnotateImageRequest can also be provided.

  • options (Google::Gax::CallOptions) —

    Overrides the default settings for this call, e.g, timeout, retries, etc.

Yields:

  • (result, operation) —

    Access the result along with the RPC operation

Yield Parameters:

Returns:

Raises:

  • (Google::Gax::GaxError) —

    if the RPC is aborted.



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# File 'lib/google/cloud/vision/v1/image_annotator_client.rb', line 218

def batch_annotate_images \
    requests,
    options: nil,
    &block
  req = {
    requests: requests
  }.delete_if { |_, v| v.nil? }
  req = Google::Gax::to_proto(req, Google::Cloud::Vision::V1::BatchAnnotateImagesRequest)
  @batch_annotate_images.call(req, options, &block)
end