Vision/src/VisionClient.php
public function annotate(Image $image, array $options = [])
    {
        $res = $this->annotateBatch([$image], $options);
        return $res[0];
    }
public function annotate(Image $image, array $options = [])
    {
        $res = $this->annotateBatch([$image], $options);
        return $res[0];
    }
public function annotate ( Image $ image , array $ options = [ ] ) { $ res = $ this -> annotateBatch ( [ $ image ] , $ options ) ; return $ res [ 0 ] ; }
Annotate a single image.

Example:
```
$familyPhotoResource = fopen(__DIR__ . '/assets/family-photo.jpg', 'r');

$image = $vision->image($familyPhotoResource, [
'FACE_DETECTION'
]);

$result = $vision->annotate($image);
```

@see https://cloud.google.com/vision/docs/reference/rest/v1/images/annotate Annotate API documentation

@param  Image $image The image to annotate
@param  array $options Configuration options
@return Annotation
Annotate a single image .