public static List <string> ExtractKeyValuePairs(Line[] lines)
{
//Initialize settings
List <TextExtract> searchKeyList = OCRHelper.RetrieveAllSearchTextKeyFields(); // Retrieve all key-fields as reference
List <Word> textvalues = new List <Word>();
List <Line> linevalues = new List <Line>();
List <string> result = new List <string>();
int x_margin, y_margin, x_width, y_height;
// Extract regions of text words
foreach (Line sline in lines)
{
int[] lvalues = sline.BoundingBox;
linevalues.Add(new Line {
Text = sline.Text, BoundingBox = lvalues
});
foreach (Word sword in sline.Words)
{
int[] wvalues = sword.BoundingBox;
textvalues.Add(new Word {
Text = sword.Text, BoundingBox = wvalues
});
}
}
// Search Key-Value Pairs inside the documents
if (searchKeyList.Count > 0)
{
foreach (TextExtract key in searchKeyList)
{
var resultkeys = linevalues.Where(a => a.Text.Contains(key.Text));
foreach (var fieldtext in resultkeys)
{
// Assign all fields values per text
x_margin = key.MarginX;
y_margin = key.MarginY;
x_width = key.Width;
y_height = key.Height;
// For every value candidate set all values above
string txtreply = string.Join(" ",
from a in textvalues
where
(a.BoundingBox[0] >= fieldtext.BoundingBox[0] + x_margin) &&
(a.BoundingBox[0] <= fieldtext.BoundingBox[0] + x_margin + x_width) &&
(a.BoundingBox[1] >= fieldtext.BoundingBox[1] + y_margin) &&
(a.BoundingBox[1] <= fieldtext.BoundingBox[1] + y_height)
select(string) a.Text);
result.Add(fieldtext.Text + " - " + txtreply);
}
}
return(result);
}
else
{
return(null);
}
}
public static async Task <List <string> > MakeAnalysisWithImage(Stream stream, string subscriptionKey, string uriEndPoint)
{
List <string> result = new List <string>();
HttpClient client = new HttpClient();
// Request headers
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", subscriptionKey);
string requestParameters = String.Format("?mode=Printed");
// Assemble the URI for the REST API method.
string uri = uriEndPoint + requestParameters;
HttpResponseMessage response;
BinaryReader binaryReader = new BinaryReader(stream);
byte[] byteData = binaryReader.ReadBytes((int)stream.Length);
using (ByteArrayContent content = new ByteArrayContent(byteData))
{
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
// Asynchronously call the REST API method.
response = await client.PostAsync(uri, content);
}
string operationLocation = null;
// The response contains the URI to retrieve the result of the process.
if (response.IsSuccessStatusCode)
{
operationLocation = response.Headers.GetValues("Operation-Location").FirstOrDefault();
}
string contentString;
int i = 0;
do
{
System.Threading.Thread.Sleep(1000);
response = await client.GetAsync(operationLocation);
contentString = await response.Content.ReadAsStringAsync();
++i;
}while (i < 10 && contentString.IndexOf("\"status\":\"Succeeded\"") == -1);
string json = response.Content.ReadAsStringAsync().Result;
json = json.TrimStart(new char[] { '[' }).TrimEnd(new char[] { ']' });
RecognizeText ocrOutput = JsonConvert.DeserializeObject <RecognizeText>(json);
if (ocrOutput != null && ocrOutput.RecognitionResult != null && ocrOutput.RecognitionResult.Lines != null)
{
List <string> resultText = new List <string>();
resultText = (from Line sline in ocrOutput.RecognitionResult.Lines
select(string) sline.Text).ToList <string>();
resultText = OCRHelper.ExtractKeyValuePairs(ocrOutput.RecognitionResult.Lines);
return(resultText);
}
else
{
return(null);
}
}