public IEnumerable <Rectangle> ExtractLicensePlates()
{
ObjectsResponse ??= _client.Annotate(new AnnotateImageRequest()
{
Image = _image,
Features =
{
new Feature {
Type = Feature.Types.Type.ObjectLocalization
}
}
});
return(ObjectsResponse.LocalizedObjectAnnotations.Where(e => e.Name == "License plate")
.Select(e => GoogleVisionCoordinateTranslator.RelativePolyToRectangle(e.BoundingPoly, Width, Height)));
}
public virtual IEnumerable <Rectangle> ExtractText()
{
TextResponse ??= _client.Annotate(new AnnotateImageRequest()
{
Image = _image,
Features =
{
new Feature {
Type = Feature.Types.Type.TextDetection
}
}
});
// filter text annotations that contains line breaks, this is probably the first one covering the whole image
return(TextResponse.TextAnnotations.Where(t => !t.Description.Contains("\n"))
.Select(t => GoogleVisionCoordinateTranslator.AbsolutePolyToRectangle(t.BoundingPoly)));
}
public virtual IEnumerable <Rectangle> ExtractFaces()
{
FacesResponse ??= _client.Annotate(new AnnotateImageRequest()
{
Image = _image,
Features =
{
new Feature {
Type = Feature.Types.Type.FaceDetection
}
}
});
return(FacesResponse.FaceAnnotations
.Select(f => GoogleVisionCoordinateTranslator.AbsolutePolyToRectangle(f.BoundingPoly))
.Select(f => GoogleVisionCoordinateTranslator.RotateRectangle(f, _rotationToApplyForFaceProcessing, Width, Height)));
}