mirror of https://github.com/restic/restic.git
106 lines
4.1 KiB
Go
106 lines
4.1 KiB
Go
// Copyright 2016 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
/*
|
|
NOTE: This package is deprecated. Use cloud.google.com/go/vision/apiv1 instead.
|
|
|
|
|
|
Package vision provides a client for the Google Cloud Vision API.
|
|
|
|
Google Cloud Vision allows easy integration of vision detection features
|
|
into developer applications, including image labeling, face and landmark
|
|
detection, optical character recognition (OCR), and tagging of explicit
|
|
content. For more information about Cloud Vision, read the Google Cloud Vision API
|
|
Documentation at https://cloud.google.com/vision/docs.
|
|
|
|
Note: This package is in beta. Some backwards-incompatible changes may occur.
|
|
|
|
Creating Images
|
|
|
|
The Cloud Vision API supports a variety of image file formats, including JPEG,
|
|
PNG8, PNG24, Animated GIF (first frame only), and RAW. See
|
|
https://cloud.google.com/vision/docs/image-best-practices#image_types for the
|
|
complete list of formats. Be aware that Cloud Vision sets upper limits on file
|
|
size as well as on the total combined size of all images in a request. Reducing
|
|
your file size can significantly improve throughput; however, be careful not to
|
|
reduce image quality in the process. See
|
|
https://cloud.google.com/vision/docs/image-best-practices#image_sizing for
|
|
current file size limits.
|
|
|
|
Creating an Image instance does not perform an API request.
|
|
|
|
Use NewImageFromReader to obtain an image from any io.Reader, such as an open file:
|
|
|
|
f, err := os.Open("path/to/image.jpg")
|
|
if err != nil { ... }
|
|
defer f.Close()
|
|
img, err := vision.NewImageFromReader(f)
|
|
if err != nil { ... }
|
|
|
|
Use NewImageFromURI to refer to an image in Google Cloud Storage or a public URL:
|
|
|
|
img := vision.NewImageFromURI("gs://my-bucket/my-image.png")
|
|
|
|
Annotating Images
|
|
|
|
Client.Annotate is the most general method in the package. It can run multiple
|
|
detections on multiple images with a single API call.
|
|
|
|
To describe the detections you want to perform on an image, create an
|
|
AnnotateRequest and specify the maximum number of results to return for each
|
|
detection of interest. The exceptions are safe search and image properties,
|
|
where a boolean is used instead.
|
|
|
|
resultSlice, err := client.Annotate(ctx, &vision.AnnotateRequest{
|
|
Image: img,
|
|
MaxLogos: 5,
|
|
MaxTexts: 100,
|
|
SafeSearch: true,
|
|
})
|
|
if err != nil { ... }
|
|
|
|
You can pass as many AnnotateRequests as desired to client.Annotate. The return
|
|
value is a slice of an Annotations. Each Annotations value may contain an Error
|
|
along with one or more successful results. The failed detections will have a nil annotation.
|
|
|
|
result := resultSlice[0]
|
|
if result.Error != nil { ... } // some detections failed
|
|
for _, logo := range result.Logos { ... }
|
|
for _, text := range result.Texts { ... }
|
|
if result.SafeSearch != nil { ... }
|
|
|
|
Other methods on Client run a single detection on a single image. For instance,
|
|
Client.DetectFaces will run face detection on the provided Image. These methods
|
|
return a single annotation of the appropriate type (for example, DetectFaces
|
|
returns a FaceAnnotation). The error return value incorporates both API call
|
|
errors and the detection errors stored in Annotations.Error, simplifying your
|
|
logic.
|
|
|
|
faces, err := client.DetectFaces(ctx, 10) // maximum of 10 faces
|
|
if err != nil { ... }
|
|
|
|
Here faces is a slice of FaceAnnotations. The Face field of each FaceAnnotation
|
|
provides easy access to the positions of facial features:
|
|
|
|
fmt.Println(faces[0].Face.Nose.Tip)
|
|
fmt.Println(faces[0].Face.Eyes.Left.Pupil)
|
|
|
|
|
|
Authentication
|
|
|
|
See examples of authorization and authentication at
|
|
https://godoc.org/cloud.google.com/go#pkg-examples.
|
|
*/
|
|
package vision // import "cloud.google.com/go/vision"
|