public AsyncOCR(OCRCallback callback)
{
callback?.Invoke(this);
}
private async Task DoOCR()
{
try
{
string Identifer = Utility.RandomHex();
DebugLog.Log("Making MS OCR request [" + Identifer + "]");
// No keyfile to check - maybe somehow validate the API key?
// Wait for rate limiter before starting the clock
AsyncStatic.rate.Check();
Stopwatch sw = new Stopwatch();
// Dump the provided image to a memory stream
var ms = new MemoryStream();
image.Save(ms, ImageFormat.Png);
// Dump the stream out to a byte array
byte[] byteData = ms.ToArray();
// Make our connection client
HttpClient client = new HttpClient();
// Build the OCR request
HttpRequestMessage request = new HttpRequestMessage();
request.RequestUri = new Uri(Properties.Settings.Default.microsoftOcrEndpoint + "vision/v2.1/ocr");
request.Method = HttpMethod.Post;
request.Headers.Add(
"Ocp-Apim-Subscription-Key",
Properties.Settings.Default.microsoftOcrApiKey);
request.Content = new ByteArrayContent(byteData);
request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
// Ask for OCR
sw.Start();
HttpResponseMessage response = await client.SendAsync(request);
var json = JToken.Parse(await response.Content.ReadAsStringAsync());
sw.Stop();
// MS data does not contain a meaningful bigbox, just fill something in here
_bigBox = new OCRBox(
(string)json["regions"][0]["boundingBox"],
"Azure doesn't provide this data.");
// MS smallbox data, meanwhile, is organized in interesting ways
_smallBoxes = json["regions"]
.SelectMany(region => region["lines"])
.SelectMany(line => line["words"])
.Select(word => new OCRBox((string)word["boundingBox"], (string)word["text"]))
.ToArray();
_timeStamp = string.Format("{0:00}:{1:00}:{2:00}.{3:000}",
sw.Elapsed.Hours,
sw.Elapsed.Minutes,
sw.Elapsed.Seconds,
sw.Elapsed.Milliseconds);
isDone = true;
callback?.Invoke(this);
DebugLog.Log("Finished MS OCR request [" + Identifer + "]");
}
catch (Exception e)
{
Console.WriteLine("\n" + e.Message);
}
}
private async Task DoOCR()
{
try
{
string Identifer = Utility.RandomHex();
DebugLog.Log("Making Google OCR request [" + Identifer + "]");
if (!File.Exists(Properties.Settings.Default.googleApiKeyPath))
{
throw new FileNotFoundException("Keyfile not present at " + Properties.Settings.Default.googleApiKeyPath);
}
// Wait for rate limiter before starting the clock
AsyncStatic.rate.Check();
Stopwatch sw = new Stopwatch();
// Dump the provided image to a memory stream
var stream = new MemoryStream();
image.Save(stream, ImageFormat.Png);
stream.Position = 0;
// Load the stream as a gimage
GImage gimage = GImage.FromStream(stream);
// Make our connection client
ImageAnnotatorClient client = new ImageAnnotatorClientBuilder
{
CredentialsPath = Properties.Settings.Default.googleApiKeyPath,
}.Build();
// Ask for OCR
sw.Start();
var response = await client.DetectTextAsync(gimage);
sw.Stop();
// If we didn't get anything back
if (response.Count == 0)
{
_bigBox = OCRBox.ErrorBigBox();
_smallBoxes = new OCRBox[] { };
}
else
{
// First result is the big box
_bigBox = new OCRBox(response.First());
// Following results are the small boxes
_smallBoxes = response.Skip(1)
.Select(ann => new OCRBox(ann))
.ToArray();
}
_timeStamp = string.Format("{0:00}:{1:00}:{2:00}.{3:000}",
sw.Elapsed.Hours,
sw.Elapsed.Minutes,
sw.Elapsed.Seconds,
sw.Elapsed.Milliseconds);
isDone = true;
callback?.Invoke(this);
DebugLog.Log("Finished Google OCR request [" + Identifer + "]");
}
catch (Grpc.Core.RpcException e)
{
string url = "";
// Define a regular expression for repeated words.
Regex rx = new Regex(@"(http\S*)",
RegexOptions.Compiled | RegexOptions.IgnoreCase);
// Find matches.
MatchCollection matches = rx.Matches(e.Message);
if (matches.Count > 0)
{
url = matches[0].Groups[0].Value;
}
frmBabel.LogWorkerError(e.Message, url);
} catch (Exception e)
{
frmBabel.LogWorkerError(e.Message, "");
}
}
