/// <summary>
/// Распознать печатный текст
/// </summary>
/// <param name="localImagePath"></param>
/// <returns></returns>
public static async Task <string> ReadPrintedText(string localImagePath)
{
string detectedText;
ImageAnnotatorClient client = await ImageAnnotatorClient.CreateAsync();
IReadOnlyList <EntityAnnotation> textAnnotations = await client.DetectTextAsync(await Google.Cloud.Vision.V1.Image.FromFileAsync(localImagePath));
detectedText = textAnnotations[0].Description;
if (detectedText != null)
{
return(detectedText);
}
else
{
throw new TextDetectorException();
}
}
public async Task <ResultFromOCRBindingModel> GetData()
{
Environment.SetEnvironmentVariable(
"GOOGLE_APPLICATION_CREDENTIALS",
CommonSecurityConstants.PathToGoogleCloudJson);
ResultFromOCRBindingModel result =
new ResultFromOCRBindingModel();
Regex snRegex = SerialNumberRegexes
.GetSNRegex("LG");
Regex modelRegex = UnitModels
.GetModelRegex(
"LG",
"TV");
ImageAnnotatorClient client =
await ImageAnnotatorClient.CreateAsync();
Image image = await Image
.FromFileAsync(
@"E:\ALEKS\Images\pictures-diploma-project\1.jpg");
IReadOnlyList <EntityAnnotation> annotations =
await client.DetectTextAsync(image);
foreach (EntityAnnotation annotation in annotations)
{
if (snRegex.Match(annotation.Description)
.Success)
{
result.ApplianceSerialNumber =
annotation.Description;
}
else if (modelRegex.Match(annotation.Description)
.Success)
{
result.ApplianceModel = annotation.Description;
}
}
return(result);
}
public static Task <IReadOnlyList <Google.Cloud.Vision.V1.EntityAnnotation> > TextDetectionAsync(byte[] img_byte)
{
var newTask = Task.Factory.StartNew(async() =>
{
IReadOnlyList <Google.Cloud.Vision.V1.EntityAnnotation> response;
Channel channel = new Channel(
ImageAnnotatorClient.DefaultEndpoint.Host,
ImageAnnotatorClient.DefaultEndpoint.Port,
Credential.ToChannelCredentials());
ImageAnnotatorClient client = ImageAnnotatorClient.Create(channel);
using (MemoryStream imageStream = new MemoryStream(img_byte))
{
var image = Google.Cloud.Vision.V1.Image.FromStream(imageStream);
response = await client.DetectTextAsync(image);
}
return(response);
});
return(newTask.Result);
}
public static async Task <string> MakeOCRRequest(string imageFilePath)
{
string credentialsPath = Environment.GetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS");
var image = Image.FromFile(imageFilePath);
ImageAnnotatorClientBuilder builder = new ImageAnnotatorClientBuilder
{
CredentialsPath = credentialsPath
};
try
{
ImageAnnotatorClient client = builder.Build();
var response = await client.DetectTextAsync(image);
string contentString = response.ToString();
return(JToken.Parse(contentString).ToString());
}
catch (Exception e)
{
Console.WriteLine("\n" + e.Message);
return("error");
}
}