// Recognize text from a remote image
private async Task <TextOperationResult> ExtractRemoteTextAsync(ComputerVisionClient computerVision, string imageUrl)
{
if (!Uri.IsWellFormedUriString(imageUrl, UriKind.Absolute))
{
Debug.WriteLine("\nInvalid remoteImageUrl:\n{0} \n", imageUrl);
return(null);
}
// Start the async process to recognize the text
RecognizeTextHeaders textHeaders = await computerVision.RecognizeTextAsync(imageUrl, textRecognitionMode);
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = textHeaders.OperationLocation.Substring(textHeaders.OperationLocation.Length - numberOfCharsInOperationId);
TextOperationResult result = await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
Debug.WriteLine("Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
// Return the results
return(result);
}
// Retrieve the recognized text
private static async Task GetTextAsync(
ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(
operationLocation.Length - Constants.NUMBER_OF_CHARS_IN_OPERATION_ID);
Console.WriteLine("\nCalling GetHandwritingRecognitionOperationResultAsync()");
TextOperationResult result =
await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
Console.WriteLine(
"Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
DisplayResults(result);
}
public static async Task <RecognitionResult> MakeTextRequest(MediaFile file)
{
using (var stream = file.GetStream())
{
var client = CreateClient();
RecognizeTextInStreamHeaders headers = await client.RecognizeTextInStreamAsync(stream, TextRecognitionMode.Handwritten);
if (headers?.OperationLocation == null)
{
return(null);
}
// Extract the operation id from the url
string operationId = headers.OperationLocation.Substring(headers.OperationLocation.Length - 36);
TextOperationResult result = await client.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
await Task.Delay(1000);
result = await client.GetTextOperationResultAsync(operationId);
}
return(result.RecognitionResult);
}
}
/// <summary>
/// Perform OCR analysis of the specified BHL page.
/// </summary>
/// <remarks>It is assumed that the page being analyzed is handwritten.</remarks>
/// <param name="pageID">BHL identifier for the page</param>
/// <returns>Text of the page</returns>
static public async Task GetNewText(int pageID)
{
// Invoke the Azure Computer Vision service to extract the text of the page.
// Assume this is a handwritten page.
string imageUrl = string.Format(Config.BhlPageImageUrl, pageID.ToString());
TextOperationResult result = await NewTextAsync(
async (ComputerVisionClient client) => await client.RecognizeTextAsync(imageUrl, TextRecognitionMode.Handwritten),
headers => headers.OperationLocation);
// Write the new text to a file
if (result.Status == TextOperationStatusCodes.Succeeded)
{
StringBuilder sb = new StringBuilder();
if (result.RecognitionResult.Lines != null)
{
foreach (var line in result.RecognitionResult.Lines)
{
sb.AppendLine(line.Text);
}
}
File.WriteAllText(
string.Format("{0}\\{1}.txt", Config.NewFolder, pageID.ToString()),
sb.ToString());
}
}
private async Task <List <string> > GetTextAsync(ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(operationLocation.Length - numberOfCharsInOperationId);
TextOperationResult result = await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running || result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
Debug.WriteLine("Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
List <string> resultlines = new List <string>();
IList <Line> lines = result.RecognitionResult?.Lines;
foreach (Line line in lines)
{
resultlines.Add(line.Text.Trim().Replace(" ", ""));
}
return(resultlines);
}
// Retrieve the recognized text
private static async Task <IList <Line> > GetTextAsync(ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(
operationLocation.Length - numberOfCharsInOperationId);
Console.WriteLine("\nCalling GetHandwritingRecognitionOperationResultAsync()");
TextOperationResult result =
await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
Console.WriteLine(
"Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(200);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
// Display the results
var lines = result.RecognitionResult.Lines;
return(lines);
}
private static List <AzureResource> ConvertTextResultToAzureResources(TextOperationResult predictionResult)
{
var types = new List <AzureResourceType>();
foreach (var line in predictionResult.RecognitionResult.Lines)
{
var wordsList = line.Words.Select(word => word.Text).ToList();
// Case insensitive
wordsList = wordsList.ConvertAll(w => w.ToLower());
// Remove punctiation marks
wordsList = wordsList.ConvertAll(w => w.Replace("[.,]+", string.Empty));
foreach (var pattern in RecognizedTextToAzureTag.Keys)
{
// Check that contains all words in pattern
if (pattern.Intersect(wordsList).Count() == pattern.Count())
{
types.Add(RecognizedTextToAzureTag[pattern]);
}
}
}
List <AzureResource> allResources = AzureResourceManager.Instance.AvailableResources;
return(allResources.Where(r => types.Contains(r.Type)).ToList());
}
private async Task <string[]> GetTextAsync(
ComputerVisionClient computerVision, string operationLocation)
{
string[] results;
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(
operationLocation.Length - numberOfCharsInOperationId);
TextOperationResult result =
await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
var lines = result.RecognitionResult.Lines;
return(lines.Select(l => l.Text).ToArray());
}
private async Task <TextOperationResult> GetTextAsync(
ComputerVisionClient computerVision,
string operationLocation,
CancellationToken cancellationToken)
{
// Retrieve the URI where the recognized text will be stored from the Operation-Location header
string operationId = operationLocation.Substring(operationLocation.Length - NumberOfCharsInOperationId);
TextOperationResult result = await computerVision.GetTextOperationResultAsync(operationId, cancellationToken);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
System.Diagnostics.Debug.WriteLine(
"Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId, cancellationToken);
}
return(result);
}
/// <summary>
/// Log text from the given TextOperationResult object.
/// </summary>
/// <param name="results">The TextOperationResult.</param>
protected void LogTextRecognitionResult(TextOperationResult results)
{
StringBuilder stringBuilder = new StringBuilder();
if (results != null && results.RecognitionResult != null && results.RecognitionResult.Lines != null && results.RecognitionResult.Lines.Count > 0)
{
stringBuilder.Append("Text: ");
stringBuilder.AppendLine();
foreach (var line in results.RecognitionResult.Lines)
{
foreach (var word in line.Words)
{
stringBuilder.Append(word.Text);
stringBuilder.Append(" ");
}
stringBuilder.AppendLine();
stringBuilder.AppendLine();
}
}
if (string.IsNullOrWhiteSpace(stringBuilder.ToString()))
{
Log("No text is recognized.");
}
else
{
Log(stringBuilder.ToString());
}
if (results.Status == TextOperationStatusCodes.Running || results.Status == TextOperationStatusCodes.NotStarted)
{
Log(Invariant($"Status is {results.Status} after trying {MaxRetryTimes} times"));
}
}
private async Task <TextOperationResult> RecognizeAsync <T>(Func <ComputerVisionClient, Task <T> > GetHeadersAsyncFunc, Func <T, string> GetOperationUrlFunc) where T : new()
{
// -----------------------------------------------------------------------
// KEY SAMPLE CODE STARTS HERE
// -----------------------------------------------------------------------
var result = default(TextOperationResult);
OutputWriterSB.AppendLine("Create result variable for storing result");
//
// Create Cognitive Services Vision API Service client.
//
var Credentials = new ApiKeyServiceClientCredentials("d8358f4194c8447bbca7c9e1605f15b0");
var Endpoint = "https://sushmavisionapi.cognitiveservices.azure.com/";
using (var client = new ComputerVisionClient(Credentials)
{
Endpoint = Endpoint
})
{
Debug.WriteLine("ComputerVisionClient is created");
OutputWriterSB.AppendLine("ComputerVisionClient is created");
try
{
Debug.WriteLine("Calling ComputerVisionClient.RecognizeTextAsync()...");
OutputWriterSB.AppendLine("Calling ComputerVisionClient.RecognizeTextAsync()...");
T recognizeHeaders = await GetHeadersAsyncFunc(client);
string operationUrl = GetOperationUrlFunc(recognizeHeaders);
string operationId = operationUrl.Substring(operationUrl.LastIndexOf('/') + 1);
Debug.WriteLine("Calling ComputerVisionClient.GetTextOperationResultAsync()...");
OutputWriterSB.AppendLine("Calling ComputerVisionClient.GetTextOperationResultAsync()...");
result = await client.GetTextOperationResultAsync(operationId);
for (int attempt = 1; attempt <= 3; attempt++)
{
if (result.Status == TextOperationStatusCodes.Failed || result.Status == TextOperationStatusCodes.Succeeded)
{
break;
}
Debug.WriteLine(string.Format("Server status: {0}, wait {1} seconds...", result.Status, TimeSpan.FromSeconds(3)));
await Task.Delay(TimeSpan.FromSeconds(3));
Debug.WriteLine("Calling ComputerVisionClient.GetTextOperationResultAsync()...");
result = await client.GetTextOperationResultAsync(operationId);
}
}
catch (Exception ex)
{
result = new TextOperationResult()
{
Status = TextOperationStatusCodes.Failed
};
Debug.WriteLine(ex.Message);
}
return(result);
}
}
private async Task <TextOperationResult> RecognizeAsync <T>(Func <ComputerVisionClient, Task <T> > GetHeadersAsyncFunc, Func <T, string> GetOperationUrlFunc) where T : new()
{
// -----------------------------------------------------------------------
// KEY SAMPLE CODE STARTS HERE
// -----------------------------------------------------------------------
var result = default(TextOperationResult);
//
// Create Cognitive Services Vision API Service client.
//
using (var client = new ComputerVisionClient(Credentials)
{
Endpoint = Endpoint
})
{
Log("ComputerVisionClient is created");
try
{
Log("Calling ComputerVisionClient.RecognizeTextAsync()...");
T recognizeHeaders = await GetHeadersAsyncFunc(client);
string operationUrl = GetOperationUrlFunc(recognizeHeaders);
string operationId = operationUrl.Substring(operationUrl.LastIndexOf('/') + 1);
Log("Calling ComputerVisionClient.GetTextOperationResultAsync()...");
result = await client.GetTextOperationResultAsync(operationId);
for (int attempt = 1; attempt <= MaxRetryTimes; attempt++)
{
if (result.Status == TextOperationStatusCodes.Failed || result.Status == TextOperationStatusCodes.Succeeded)
{
break;
}
Log(string.Format("Server status: {0}, wait {1} seconds...", result.Status, QueryWaitTimeInSecond));
await Task.Delay(QueryWaitTimeInSecond);
Log("Calling ComputerVisionClient.GetTextOperationResultAsync()...");
result = await client.GetTextOperationResultAsync(operationId);
}
}
catch (ClientException ex)
{
result = new TextOperationResult()
{
Status = TextOperationStatusCodes.Failed
};
Log(ex.Error.Message);
}
return(result);
}
// -----------------------------------------------------------------------
// KEY SAMPLE CODE ENDS HERE
// -----------------------------------------------------------------------
}
public async Task <IHttpActionResult> Post()
{
//HttpRequestMessage request = this.Request;
ComputerVisionClient computerVision = new ComputerVisionClient(
new ApiKeyServiceClientCredentials(subscriptionKey),
new System.Net.Http.DelegatingHandler[] { });
// Specify the Azure region
computerVision.Endpoint = "https://eastus2.api.cognitive.microsoft.com";
RecognizeTextHeaders analysis = null;
//using (Stream imageStream = await request.Content.ReadAsStreamAsync())
//{
// analysis = await computerVision.RecognizeTextInStreamAsync(imageStream, TextRecognitionMode.Printed);
//}
analysis = await computerVision.RecognizeTextAsync("https://amazonasatual.com.br/wp-content/uploads/2018/08/CNH-falsa-Manaus.jpeg", TextRecognitionMode.Printed);
string operation = analysis.OperationLocation.Split('/').GetValue(analysis.OperationLocation.Split('/').Length - 1).ToString();
Thread.Sleep(5000);
TextOperationResult result = await computerVision.GetTextOperationResultAsync(operation);
Cadastro cadastro = new Cadastro();
cadastro.Nome = result.RecognitionResult.Lines[5].Text;
cadastro.RG = result.RecognitionResult.Lines[7].Text;
cadastro.CPF = result.RecognitionResult.Lines[11].Text;
{
DateTime resultado;
if (DateTime.TryParse(result.RecognitionResult.Lines[12].Text, out resultado))
{
cadastro.DtNascimento = resultado;
}
}
cadastro.NomeMae = result.RecognitionResult.Lines[19].Text;
{
DateTime resultado;
if (DateTime.TryParse(result.RecognitionResult.Lines[29].Text, out resultado))
{
cadastro.Validade = resultado;
}
}
return(Ok(cadastro));
}
private async Task <RecognitionResult> RecognizeTextAndAdd(ImageFile imageFile, TextRecognitionMode textRecognitionMode)
{
RecognitionResult recognitionResult = null;
TextOperationResult textOperationResult = await UploadAndRecognizeImageAsync(imageFile.Path, textRecognitionMode);
if (textOperationResult.Status == TextOperationStatusCodes.Succeeded)
{
recognitionResult = textOperationResult.RecognitionResult;
_computerVisionRepository.AddRecognitionResult(imageFile, recognitionResult, textRecognitionMode);
}
return(recognitionResult);
}
private static void DisplayResults(TextOperationResult result)
{
// Display the results
Console.WriteLine();
var lines = result.RecognitionResult.Lines;
foreach (Line line in lines)
{
Console.WriteLine(line.Text);
}
Console.WriteLine();
}
// Retrieve the recognized text
private static async Task GetTextAsync(
ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(
operationLocation.Length - numberOfCharsInOperationId);
Console.WriteLine("\nCalling GetHandwritingRecognitionOperationResultAsync()");
TextOperationResult result =
await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
Console.WriteLine(
"Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
// Write to text file instead of console
// EXAMPLE==> string path = @"D:\ouput\outfile"+temp+".txt"
string path = @"OUTPUT_PATH" + temp + ".txt";
temp = temp + 1;
if (!File.Exists(path))
{
File.Create(path).Dispose();
}
if (File.Exists(path))
{
foreach (Line line in result.RecognitionResult.Lines)
{
using (var tw = new StreamWriter(path, true))
{
tw.WriteLine(line.Text);
}
}
}
Console.WriteLine("Successfully extracted");
await Task.Delay(1000);
//Environment.Exit(0);
}
private void ShowExtractedText(TextOperationResult result)
{
if (result == null || result.Status != TextOperationStatusCodes.Succeeded)
{
ImageDescription = "Error occurred.";
return;
}
foreach (var line in result.RecognitionResult.Lines)
{
ImageDescription += line.Text + "<br>";
}
}
protected internal override IOperationResult ReadResponse(IPooledSocket socket)
{
string response = TextSocketHelper.ReadResponse(socket);
var result = new TextOperationResult();
//maybe we should throw an exception when the item is not found?
if (String.Compare(response, "NOT_FOUND", StringComparison.Ordinal) == 0)
return result.Fail("Failed to read response. Item not found");
result.Success =
UInt64.TryParse(response, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite, CultureInfo.InvariantCulture, out this.result);
return result;
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
GetResponse r = GetHelper.ReadItem(socket);
var result = new TextOperationResult();
if (r == null) return result.Fail("Failed to read response");
this.result = r.Item;
this.Cas = r.CasValue;
GetHelper.FinishCurrent(socket);
return result.Pass();
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
string response = TextSocketHelper.ReadResponse(socket);
var result = new TextOperationResult();
//maybe we should throw an exception when the item is not found?
if (String.Compare(response, "NOT_FOUND", StringComparison.Ordinal) == 0)
{
return(result.Fail("Failed to read response. Item not found"));
}
result.Success = UInt64.TryParse(response, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite, CultureInfo.InvariantCulture, out this.result);
return(result);
}
// Fail if we didn't get a valid result from the recognition service
private static void ValidateTextOperationResult(this TextOperationResult result, string name)
{
switch (result.Status)
{
case TextOperationStatusCodes.Failed:
throw new FunctionInvocationException($"Text recognition server wasn't able to recognize text in '{name}'");
case TextOperationStatusCodes.NotStarted:
throw new FunctionInvocationException($"Text recognition server wasn't able to start recognizing text in '{name}'");
case TextOperationStatusCodes.Running:
throw new FunctionTimeoutException($"Text recognition server didn't respond on a reasonable time frame when recognizing text in '{name}'");
}
}
protected internal override async Task <IOperationResult> ReadResponseAsync(PooledSocket socket, CancellationToken cancellationToken = default(CancellationToken))
{
string response = await TextSocketHelper.ReadResponseAsync(socket, cancellationToken).ConfigureAwait(false);
var result = new TextOperationResult();
//maybe we should throw an exception when the item is not found?
if (String.Compare(response, "NOT_FOUND", StringComparison.Ordinal) == 0)
{
return(result.Fail("Failed to read response. Item not found"));
}
result.Success = UInt64.TryParse(response, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite, CultureInfo.InvariantCulture, out this.result);
return(result);
}
protected override Enyim.Caching.Memcached.Results.IOperationResult ReadResponse(PooledSocket socket)
{
string description = TextSocketHelper.ReadResponse(socket);
if (String.Compare(description, "END", StringComparison.Ordinal) == 0)
{
return(null);
}
if (description.Length < 7 || String.Compare(description, 0, "CONFIG ", 0, 7, StringComparison.Ordinal) != 0)
{
throw new MemcachedClientException("No CONFIG response received.\r\n" + description);
}
string[] parts = description.Split(' ');
/****** Format ********
*
* CONFIG <key> <flags> <bytes>
* 0 1 2 3
*
*/
ushort flags = UInt16.Parse(parts[2], CultureInfo.InvariantCulture);
int length = Int32.Parse(parts[3], CultureInfo.InvariantCulture);
byte[] allNodes = new byte[length];
byte[] eod = new byte[2];
socket.Read(allNodes, 0, length);
socket.Read(eod, 0, 2); // data is terminated by \r\n
this.result = new CacheItem(flags, new ArraySegment <byte>(allNodes, 0, length));
this.ConfigResult = this.result;
string response = TextSocketHelper.ReadResponse(socket);
if (String.Compare(response, "END", StringComparison.Ordinal) != 0)
{
throw new MemcachedClientException("No END was received.");
}
var result = new TextOperationResult();
return(result.Pass());
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
GetResponse r = GetHelper.ReadItem(socket);
var result = new TextOperationResult();
if (r == null)
{
return(result.Fail("Failed to read response"));
}
this.result = r.Item;
this.Cas = r.CasValue;
GetHelper.FinishCurrent(socket);
return(result.Pass());
}
/// <summary>
/// Use the Azure Computer Vision API to perform OCR analysis of the specified BHL page image.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="GetHeadersAsyncFunc"></param>
/// <param name="GetOperationUrlFunc"></param>
/// <returns></returns>
static private async Task <TextOperationResult> NewTextAsync <T>(Func <ComputerVisionClient, Task <T> > GetHeadersAsyncFunc, Func <T, string> GetOperationUrlFunc) where T : new()
{
var result = default(TextOperationResult);
// Create Cognitive Services Computer Vision API Service client.
ApiKeyServiceClientCredentials credentials = new ApiKeyServiceClientCredentials(Config.SubscriptionKey);
using (var client = new ComputerVisionClient(credentials)
{
Endpoint = Config.Endpoint
})
{
try
{
T recognizeHeaders = await GetHeadersAsyncFunc(client);
string operationUrl = GetOperationUrlFunc(recognizeHeaders);
string operationId = operationUrl.Substring(operationUrl.LastIndexOf('/') + 1);
result = await client.GetTextOperationResultAsync(operationId);
// Retry a few times in the case of failure
for (int attempt = 1; attempt <= Config.MaxRetryTimes; attempt++)
{
if (result.Status == TextOperationStatusCodes.Failed ||
result.Status == TextOperationStatusCodes.Succeeded)
{
break;
}
await Task.Delay(Config.QueryWaitTimeInSeconds); // Wait a bit before retrying
result = await client.GetTextOperationResultAsync(operationId);
}
}
catch (Exception ex)
{
result = new TextOperationResult()
{
Status = TextOperationStatusCodes.Failed
};
}
return(result);
}
}
protected internal override async Task <IOperationResult> ReadResponseAsync(PooledSocket socket, CancellationToken cancellationToken = default(CancellationToken))
{
var response = await GetHelper.ReadItemAsync(socket, cancellationToken).ConfigureAwait(false);
var result = new TextOperationResult();
if (response == null)
{
return(result.Fail("Failed to read response"));
}
this.result = response.Item;
this.Cas = response.CasValue;
await GetHelper.FinishCurrentAsync(socket, cancellationToken).ConfigureAwait(false);
return(result.Pass());
}
// Retrieve the recognized text
private static async Task <String> GetTextAsync(
ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(
operationLocation.Length - numberOfCharsInOperationId);
TextOperationResult result =
await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
String S1 = "";
try
{
if (result != null && result.Status != null)
{
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
result = await computerVision.GetTextOperationResultAsync(operationId);
}
var lines = result.RecognitionResult.Lines;
foreach (Line line in lines)
{
if (line.Text.Contains("+"))
{
line.Text = line.Text.Replace(" ", "");
}
S1 = S1 + line.Text + "\n";
}
}
}
catch (Exception e)
{
}
return(S1);
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
this.result = new Dictionary <string, CacheItem>();
this.Cas = new Dictionary <string, ulong>();
var result = new TextOperationResult();
var response = new BinaryResponse();
while (response.Read(socket))
{
this.StatusCode = response.StatusCode;
// found the noop, quit
if (response.CorrelationId == this.noopId)
{
return(result.Pass());
}
string key;
// find the key to the response
if (!this.idToKey.TryGetValue(response.CorrelationId, out key))
{
// we're not supposed to get here tho
log.WarnFormat("Found response with CorrelationId {0}, but no key is matching it.", response.CorrelationId);
continue;
}
if (log.IsDebugEnabled)
{
log.DebugFormat("Reading item {0}", key);
}
// deserialize the response
int flags = BinaryConverter.DecodeInt32(response.Extra, 0);
this.result[key] = new CacheItem((ushort)flags, response.Data);
this.Cas[key] = response.CAS;
}
// finished reading but we did not find the NOOP
return(result.Fail("Found response with CorrelationId {0}, but no key is matching it."));
}
public async Task <string> TextFromImageAsync(byte[] data)
{
ComputerVisionClient computerVision = new ComputerVisionClient(new ApiKeyServiceClientCredentials("8715a698ede2411b8909589611ad3f6d"), new System.Net.Http.DelegatingHandler[] { });
computerVision.Endpoint = "https://westcentralus.api.cognitive.microsoft.com";
HttpOperationHeaderResponse <RecognizeTextInStreamHeaders> res = await computerVision.RecognizeTextInStreamWithHttpMessagesAsync(new MemoryStream(data), TextRecognitionMode.Printed);
var str = await res.Response.Content.ReadAsStringAsync();
var id = res.Headers.OperationLocation;
const int numberOfCharsInOperationId = 36;
id = id.Substring(id.Length - numberOfCharsInOperationId);
TextOperationResult result = await computerVision.GetTextOperationResultAsync(id);
var r = res.Response.Content.ReadAsStringAsync();
return(r.ToString());
}
private static async Task GetTextAsync(
ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be
// stored from the Operation-Location header
string operationId = operationLocation.Substring(
operationLocation.Length - numberOfCharsInOperationId);
Console.WriteLine("\nCalling GetHandwritingRecognitionOperationResultAsync()");
TextOperationResult result =
await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
int maxRetries = 10;
while ((result.Status == TextOperationStatusCodes.Running ||
result.Status == TextOperationStatusCodes.NotStarted) && i++ < maxRetries)
{
Console.WriteLine(
"Server status: {0}, waiting {1} seconds...", result.Status, i);
await Task.Delay(1000);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
StringBuilder text = new StringBuilder();
// Display the results
Console.WriteLine();
var lines = result.RecognitionResult.Lines;
foreach (Line line in lines)
{
text.AppendLine(line.Text);
}
Recipes recp = new Recipes();
recp.Title = Guid.NewGuid().ToString();
recp.Text = text.ToString();
DataRepository.Instance.Save <Recipes>(recp);
}
private TextRecognitionResult GetTextRecognitionResult(TextOperationResult result)
{
var lines = result.RecognitionResult.Lines
.Select(x => new Dtos.Line()
{
BoundingBox = BoundingBox.Create(x.BoundingBox.ToList()),
Text = x.Text,
Words = x.Words.Select(y => new Dtos.Word()
{
BoundingBox = BoundingBox.Create(x.BoundingBox.ToList()),
Text = y.Text
}).ToList()
}).ToList();
return(new TextRecognitionResult()
{
Lines = lines
});
}
private static async Task <TextOperationResult> GetTextRecognitionResultAsync(ComputerVisionClient computerVision, string operationLocation)
{
// Retrieve the URI where the recognized text will be stored from the Operation-Location header
string operationId = operationLocation.Substring(operationLocation.Length - NumberOfCharsInOperationId);
TextOperationResult result = await computerVision.GetTextOperationResultAsync(operationId);
// Wait for the operation to complete
int i = 0;
while ((result.Status == TextOperationStatusCodes.Running || result.Status == TextOperationStatusCodes.NotStarted) &&
i++ < MaxRetriesOnTextRecognition)
{
await Task.Delay(DelayOnTextRecognition);
result = await computerVision.GetTextOperationResultAsync(operationId);
}
return(result);
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
this.result = new Dictionary<string, CacheItem>();
this.Cas = new Dictionary<string, ulong>();
var result = new TextOperationResult();
var response = new BinaryResponse();
while (response.Read(socket))
{
this.StatusCode = response.StatusCode;
// found the noop, quit
if (response.CorrelationId == this.noopId)
return result.Pass();
string key;
// find the key to the response
if (!this.idToKey.TryGetValue(response.CorrelationId, out key))
{
// we're not supposed to get here tho
log.WarnFormat("Found response with CorrelationId {0}, but no key is matching it.", response.CorrelationId);
continue;
}
if (log.IsDebugEnabled) log.DebugFormat("Reading item {0}", key);
// deserialize the response
int flags = BinaryConverter.DecodeInt32(response.Extra, 0);
this.result[key] = new CacheItem((ushort)flags, response.Data);
this.Cas[key] = response.CAS;
}
// finished reading but we did not find the NOOP
return result.Fail("Found response with CorrelationId {0}, but no key is matching it.");
}
