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- // Copyright 2017, Google LLC
- //
- // 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.
-
- package vision
-
- import (
- "context"
-
- gax "github.com/googleapis/gax-go/v2"
- pb "google.golang.org/genproto/googleapis/cloud/vision/v1"
- "google.golang.org/grpc/codes"
- "google.golang.org/grpc/status"
- )
-
- // AnnotateImage runs image detection and annotation for a single image.
- func (c *ImageAnnotatorClient) AnnotateImage(ctx context.Context, req *pb.AnnotateImageRequest, opts ...gax.CallOption) (*pb.AnnotateImageResponse, error) {
- res, err := c.BatchAnnotateImages(ctx, &pb.BatchAnnotateImagesRequest{
- Requests: []*pb.AnnotateImageRequest{req},
- }, opts...)
- if err != nil {
- return nil, err
- }
- return res.Responses[0], nil
- }
-
- // Called for a single image and a single feature.
- func (c *ImageAnnotatorClient) annotateOne(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, ftype pb.Feature_Type, maxResults int, opts []gax.CallOption) (*pb.AnnotateImageResponse, error) {
- res, err := c.AnnotateImage(ctx, &pb.AnnotateImageRequest{
- Image: img,
- ImageContext: ictx,
- Features: []*pb.Feature{{Type: ftype, MaxResults: int32(maxResults)}},
- }, opts...)
- if err != nil {
- return nil, err
- }
- // When there is only one image and one feature, the response's Error field is
- // unambiguously about that one detection, so we "promote" it to the error return
- // value.
- // res.Error is a google.rpc.Status. Convert to a Go error. Use a gRPC
- // error because it preserves the code as a separate field.
- // TODO(jba): preserve the details field.
- if res.Error != nil {
- return nil, status.Errorf(codes.Code(res.Error.Code), "%s", res.Error.Message)
- }
- return res, nil
- }
-
- // DetectFaces performs face detection on the image.
- // At most maxResults results are returned.
- func (c *ImageAnnotatorClient) DetectFaces(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, maxResults int, opts ...gax.CallOption) ([]*pb.FaceAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_FACE_DETECTION, maxResults, opts)
- if err != nil {
- return nil, err
- }
- return res.FaceAnnotations, nil
- }
-
- // DetectLandmarks performs landmark detection on the image.
- // At most maxResults results are returned.
- func (c *ImageAnnotatorClient) DetectLandmarks(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, maxResults int, opts ...gax.CallOption) ([]*pb.EntityAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_LANDMARK_DETECTION, maxResults, opts)
- if err != nil {
- return nil, err
- }
- return res.LandmarkAnnotations, nil
- }
-
- // DetectLogos performs logo detection on the image.
- // At most maxResults results are returned.
- func (c *ImageAnnotatorClient) DetectLogos(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, maxResults int, opts ...gax.CallOption) ([]*pb.EntityAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_LOGO_DETECTION, maxResults, opts)
- if err != nil {
- return nil, err
- }
- return res.LogoAnnotations, nil
- }
-
- // DetectLabels performs label detection on the image.
- // At most maxResults results are returned.
- func (c *ImageAnnotatorClient) DetectLabels(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, maxResults int, opts ...gax.CallOption) ([]*pb.EntityAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_LABEL_DETECTION, maxResults, opts)
- if err != nil {
- return nil, err
- }
- return res.LabelAnnotations, nil
- }
-
- // DetectTexts performs text detection on the image.
- // At most maxResults results are returned.
- func (c *ImageAnnotatorClient) DetectTexts(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, maxResults int, opts ...gax.CallOption) ([]*pb.EntityAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_TEXT_DETECTION, maxResults, opts)
- if err != nil {
- return nil, err
- }
- return res.TextAnnotations, nil
- }
-
- // DetectDocumentText performs full text (OCR) detection on the image.
- func (c *ImageAnnotatorClient) DetectDocumentText(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) (*pb.TextAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_DOCUMENT_TEXT_DETECTION, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.FullTextAnnotation, nil
- }
-
- // DetectSafeSearch performs safe-search detection on the image.
- func (c *ImageAnnotatorClient) DetectSafeSearch(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) (*pb.SafeSearchAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_SAFE_SEARCH_DETECTION, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.SafeSearchAnnotation, nil
- }
-
- // DetectImageProperties computes properties of the image.
- func (c *ImageAnnotatorClient) DetectImageProperties(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) (*pb.ImageProperties, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_IMAGE_PROPERTIES, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.ImagePropertiesAnnotation, nil
- }
-
- // DetectWeb computes a web annotation on the image.
- func (c *ImageAnnotatorClient) DetectWeb(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) (*pb.WebDetection, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_WEB_DETECTION, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.WebDetection, nil
- }
-
- // CropHints computes crop hints for the image.
- func (c *ImageAnnotatorClient) CropHints(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) (*pb.CropHintsAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_CROP_HINTS, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.CropHintsAnnotation, nil
- }
-
- // LocalizeObject runs the localizer for object detection.
- func (c *ImageAnnotatorClient) LocalizeObjects(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) ([]*pb.LocalizedObjectAnnotation, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_OBJECT_LOCALIZATION, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.LocalizedObjectAnnotations, nil
- }
-
- // ProductSearch searches the image for products.
- func (c *ImageAnnotatorClient) ProductSearch(ctx context.Context, img *pb.Image, ictx *pb.ImageContext, opts ...gax.CallOption) (*pb.ProductSearchResults, error) {
- res, err := c.annotateOne(ctx, img, ictx, pb.Feature_PRODUCT_SEARCH, 0, opts)
- if err != nil {
- return nil, err
- }
- return res.ProductSearchResults, nil
- }
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