private static string RunOcr()
{
int res;
TNSOCR.Img_DeleteAllBlocks(ImgObj);
if (Frame.Width > 0)
{
Rectangle r = Frame;
int w, h;
TNSOCR.Img_GetSize(ImgObj, out w, out h);
if (r.X < 0)
{
r.X = 0;
}
if (r.Y < 0)
{
r.Y = 0;
}
if (r.Width > w)
{
r.Width = w;
}
if (r.Height > h)
{
r.Height = h;
}
int BlkObj;
res = TNSOCR.Img_AddBlock(ImgObj, r.Left, r.Top, r.Width, r.Height, out BlkObj);
if (res > TNSOCR.ERROR_FIRST)
{
ShowError("Img_AddBlock", res);
return(null);
}
//detect text block inversion
TNSOCR.Blk_Inversion(BlkObj, TNSOCR.BLK_INVERSE_DETECT);
Frame.Width = 0;
}
//zoning will not be executed since we have created text block
res = TNSOCR.Img_OCR(ImgObj, TNSOCR.OCRSTEP_ZONING, TNSOCR.OCRSTEP_LAST, 0);
if (res > TNSOCR.ERROR_FIRST)
{
ShowError("Img_OCR", res);
return(null);
}
int flags = TNSOCR.FMT_EDITCOPY; //or TNSOCR.FMT_EXACTCOPY
StringBuilder txt = new StringBuilder(0);
int n = TNSOCR.Img_GetImgText(ImgObj, txt, 0, flags); //get buffer text length plus null-terminated zero
txt = new StringBuilder(n + 1);
TNSOCR.Img_GetImgText(ImgObj, txt, n + 1, flags);
return(txt.ToString());
}
private static bool LoadImage(string fileName)
{
int res = TNSOCR.Img_LoadFile(ImgObj, fileName);
if (res > TNSOCR.ERROR_FIRST)
{
ShowError("Img_LoadFile", res);
return(false);
}
int w0, h0, w, h;
//native size
TNSOCR.Img_GetSize(ImgObj, out w0, out h0);
//now apply image scaling, binarize image, deskew etc,
//everything except zoning and OCR
res = TNSOCR.Img_OCR(ImgObj, TNSOCR.OCRSTEP_FIRST, TNSOCR.OCRSTEP_ZONING - 1, 0);
if (res > TNSOCR.ERROR_FIRST)
{
ShowError("Img_OCR", res);
return(false);
}
//final size after pre-processing
TNSOCR.Img_GetSize(ImgObj, out w, out h);
/*res = TNSOCR.Img_GetSkewAngle(ImgObj);
* if (res > TNSOCR.ERROR_FIRST)
* {
* ShowError("Img_GetSkewAngle", res);
* //lbSkew.Text = "";
* }
* else
* {
* //lbSkew.Text = "Skew angle (degrees): " + (res / 1000.0);
* }
*
* //pixel lines info
* res = TNSOCR.Img_GetPixLineCnt(ImgObj);
* if (res > TNSOCR.ERROR_FIRST)
* {
* ShowError("Img_GetPixLineCnt", res);
* return false;
* }
* //lbLines.Text = "Lines: " + res.ToString();
*
* //edPage.Text = "1";
* //lbPages.Text = "of " + TNSOCR.Img_GetPageCount(ImgObj).ToString();
*/
Frame = new Rectangle(0, 0, w, h);
return(true);
}
private static void SetAdditionalSettings()
{
//copy some settings (this is image scale, we handle this externally)
/*StringBuilder val = new StringBuilder(256);
* if (TNSOCR.Cfg_GetOption(CfgObj, TNSOCR.BT_DEFAULT, "ImgAlizer/AutoScale", val, 256) < TNSOCR.ERROR_FIRST)
* cbScale.Enabled = (val.ToString() == "1");*/
//default this option is disabled because it takes about 10% of total recognition time
//enable it to demonstrate this feature
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Zoning/FindBarcodes", "1");
//also enable auto-detection of image inversion
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "ImgAlizer/Inversion", "2");
}
private static void Close()
{
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
}
private static void SetLanguage(string language)
{
for (int i = 0; i < languages.Length; i++)
{
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + languages[i], language == languages[i] ? "1" : "0");
//Console.WriteLine("Set " + languages[i] + " " + (language == languages[i] ? "1" : "0") + " " + res);
}
/*StringBuilder val;
* for (int i = 0; i < languages.Length; i++)
* {
* val = new StringBuilder(256);
* if (TNSOCR.Cfg_GetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + languages[i], val, 256) < TNSOCR.ERROR_FIRST)
* {
* Console.WriteLine("Lang " + languages[i] + " " + val);
* }
* }*/
}
private static void Initialize()
{
//get NSOCR version
StringBuilder val;
val = new StringBuilder(256);
TNSOCR.Engine_GetVersion(val); //if you get "BadImageFormatException" error here: find and check "LIBNAME" constant in "NSOCR.cs"
//Text = Text + " [ NSOCR version: " + val + " ] ";
TNSOCR.Engine_SetLicenseKey(""); //required for licensed version only
//init engine and create ocr-related objects
TNSOCR.Engine_Initialize();
TNSOCR.Cfg_Create(out CfgObj);
TNSOCR.Ocr_Create(CfgObj, out OcrObj);
TNSOCR.Img_Create(OcrObj, out ImgObj);
TNSOCR.Cfg_LoadOptions(CfgObj, "Config.dat"); //load options, if path not specified, current folder and folder with NSOCR.dll will be checked
//Console.WriteLine("Version:{0} CfgObj:{1} OcrObj:{2} ImgObj:{3}", val, CfgObj, OcrObj, ImgObj);
// These have no use
//SetAdditionalSettings();
}
public async Task <object> Invoke(dynamic input)
{
Image bmp;
int CfgObj;
bool Dwn = false;
Rectangle Frame;
Graphics gr;
int ImgObj;
bool NoEvent;
int OcrObj;
var fileByte = (byte[])input.byte64;
StringBuilder val;
val = new StringBuilder(256);
TNSOCR.Engine_GetVersion(val);
//if you get "BadImageFormatException" error here: find and check "LIBNAME" constant in "NSOCR.cs"
// Console.WriteLine(" [ NSOCR version: " + val + " ] ");
TNSOCR.Engine_SetLicenseKey(((string)input.finalKey)); //required for licensed version only
//init engine and create ocr-related objects
TNSOCR.Engine_Initialize();
TNSOCR.Cfg_Create(out CfgObj);
TNSOCR.Ocr_Create(CfgObj, out OcrObj);
TNSOCR.Img_Create(OcrObj, out ImgObj);
TNSOCR.Cfg_LoadOptions(CfgObj, "Config.dat");
val = new StringBuilder(256);
#region Language
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "English", (((bool)input.English)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Bulgarian", (((bool)input.Bulgarian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Catalan", (((bool)input.Catalan)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Croatian", (((bool)input.Croatian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Czech", (((bool)input.Czech)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Danish", (((bool)input.Danish)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Dutch", (((bool)input.Dutch)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Estonian", (((bool)input.Estonian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Finnish", (((bool)input.Finnish)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "French", (((bool)input.French)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "German", (((bool)input.German)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Hungarian", (((bool)input.Hungarian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Indonesian", (((bool)input.Indonesian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Italian", (((bool)input.Italian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Latvian", (((bool)input.Latvian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Lithuanian", (((bool)input.Lithuanian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Norwegian", (((bool)input.Norwegian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Polish", (((bool)input.Polish)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Portuguese", (((bool)input.Portuguese)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Romanian", (((bool)input.Romanian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Russian", (((bool)input.Russian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Slovak", (((bool)input.Slovak)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Slovenian", (((bool)input.Slovenian)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Spanish", (((bool)input.Spanish)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Swedish", (((bool)input.Swedish)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Turkish", (((bool)input.Turkish)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Arabic", (((bool)input.Arabic)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Chinese_Simplified", (((bool)input.Chinese_Simplified)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Chinese_Traditional", (((bool)input.Chinese_Traditional)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Japanese", (((bool)input.Japanese)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Languages/" + "Korean", (((bool)input.Korean)) ? "1" : "0");
#endregion
#region Configuration
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Zoning/FindBarcodes", (((bool)input.FindBarcodes)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "ImgAlizer/Inversion", (((bool)input.ImgInversion)) ? "2" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Zoning/DetectInversion", (((bool)input.ZonesInversion)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "ImgAlizer/SkewAngle", (((bool)input.DetectFixSkew)) ? "360" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "ImgAlizer/AutoRotate", (((bool)input.Rotation)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "ImgAlizer/NoiseFilter", (((bool)input.ImgNoiseFilter)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "PixLines/RemoveLines", (((bool)input.RemoveLines)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "PixLines/FindHorLines", (((bool)input.RemoveLines)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "PixLines/FindVerLines", (((bool)input.RemoveLines)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Main/GrayMode", (((bool)input.GrayMode)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Main/FastMode", (((bool)input.FastMode)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Binarizer/BinTwice", (((bool)input.BinTwice)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "WordAlizer/CorrectMixed", (((bool)input.CorrectMixed)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Dictionaries/UseDictionary", (((bool)input.Dictionary)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Zoning/OneColumn", (((bool)input.OneColumn)) ? "1" : "0");
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Main/EnabledChars", (((string)input.EnabledChars)));
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Main/DisabledChars", (((string)input.DisabledChars)));
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Binarizer/SimpleThr", (((string)input.BinarizationThreshold)));
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "WordAlizer/TextQual", (((string)input.TextQuality)));
TNSOCR.Cfg_SetOption(CfgObj, TNSOCR.BT_DEFAULT, "Main/PdfDPI", (((string)input.PDFRenderingDPI)));
#endregion
IntPtr unmanagedPointer = Marshal.AllocHGlobal(fileByte.Length);
Marshal.Copy(fileByte, 0, unmanagedPointer, fileByte.Length);
// Call unmanaged code
var res = TNSOCR.Img_LoadFromMemory(ImgObj, unmanagedPointer, fileByte.Length);
Marshal.FreeHGlobal(unmanagedPointer);
res = TNSOCR.Img_OCR(ImgObj, TNSOCR.OCRSTEP_FIRST, TNSOCR.OCRSTEP_ZONING - 1, TNSOCR.OCRFLAG_NONE);
if (res > TNSOCR.ERROR_FIRST)
{
//Console.WriteLine("Img_OCR", res);
//Console.ReadLine();
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
return("");
}
res = TNSOCR.Img_OCR(ImgObj, TNSOCR.OCRSTEP_ZONING, TNSOCR.OCRSTEP_LAST, TNSOCR.OCRFLAG_NONE);
if (res > TNSOCR.ERROR_FIRST)
{
// Console.WriteLine("Img_OCR", res);
// Console.ReadLine();
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
return("");
}
var flags = TNSOCR.FMT_EDITCOPY; //or TNSOCR.FMT_EXACTCOPY
var txt = new StringBuilder(0);
var n = TNSOCR.Img_GetImgText(ImgObj, txt, 0, flags); //get buffer text length plus null-terminated zero
txt = new StringBuilder(n + 1);
TNSOCR.Img_GetImgText(ImgObj, txt, n + 1, flags);
// Console.WriteLine(txt.ToString());
int SvrObj;
res = TNSOCR.Svr_Create(CfgObj, TNSOCR.SVR_FORMAT_XML, out SvrObj);
if (res > TNSOCR.ERROR_FIRST)
{
// Console.WriteLine("Svr_Create", res);
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
return("");
}
TNSOCR.Svr_NewDocument(SvrObj);
res = TNSOCR.Svr_AddPage(SvrObj, ImgObj, 0);
if (res > TNSOCR.ERROR_FIRST)
{
// Console.WriteLine("Svr_AddPage", res);
TNSOCR.Svr_Destroy(SvrObj);
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
return("");
}
// IntPtr demo = new IntPtr();
//Array bytes = new byte[21126];
res = TNSOCR.Svr_SaveToMemory(SvrObj, IntPtr.Zero, 0);
var size = res;
if (res > TNSOCR.ERROR_FIRST)
{
// Console.WriteLine("Svr_SaveToFile", res);
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
return("");
}
var demo = IntPtr.Zero;
try
{
demo = Marshal.AllocHGlobal(size);
res = TNSOCR.Svr_SaveToMemory(SvrObj, demo, size);
var managedArray2 = new byte[size];
Marshal.Copy(demo, managedArray2, 0, size);
var str5 = Encoding.Unicode.GetString(managedArray2);
TNSOCR.Svr_Destroy(SvrObj);
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
return(str5);
}
catch (Exception e)
{
return(e.Message);
}
finally
{
// Free unmanaged memory
if (demo != IntPtr.Zero)
{
Marshal.FreeHGlobal(demo);
}
if (ImgObj != 0)
{
TNSOCR.Img_Destroy(ImgObj);
}
if (OcrObj != 0)
{
TNSOCR.Ocr_Destroy(OcrObj);
}
if (CfgObj != 0)
{
TNSOCR.Cfg_Destroy(CfgObj);
}
TNSOCR.Engine_Uninitialize();
}
//here you can adjust configuration (scale image, select languages, etc) - refer to other C# sample projects
//
}
