public async Task TestOCRFromRx() { var apiKey = System.Environment.GetEnvironmentVariable("VISION_API_KEY"); Assert.IsFalse(string.IsNullOrWhiteSpace(apiKey), "Must provide API Key"); var imageToText = new ImageToText(apiKey); var rxFile = @"c:\dev\rximage.png"; var annotated = @"c:\dev\rximage_annotated.png"; var ocr = await imageToText.ProcessImageFileToTextAsync(rxFile); using (Stream inStream = new FileStream(rxFile, FileMode.Open, FileAccess.Read), annotatedStream = ImageUtilities.AnnotateImageWithOcrResults(inStream, ocr), outStream = new FileStream(annotated, FileMode.OpenOrCreate, FileAccess.Write)) { await annotatedStream.CopyToAsync(outStream); } }