static void example1()
{
string dataPath = ".//";
string language = "eng";
OcrEngineMode oem = OcrEngineMode.DEFAULT;
PageSegmentationMode psm = PageSegmentationMode.AUTO_OSD;
TessBaseAPI tessBaseAPI = new TessBaseAPI();
// Initialize tesseract-ocr
if (!tessBaseAPI.Init(dataPath, language, oem))
{
throw new Exception("Could not initialize tesseract.");
}
// Set the Page Segmentation mode
tessBaseAPI.SetPageSegMode(psm);
}
static void example4()
{
string dataPath = "./tessdata/";
string language = "eng";
string inputFile = "./input.png";
OcrEngineMode oem = OcrEngineMode.DEFAULT;
PageSegmentationMode psm = PageSegmentationMode.AUTO_OSD;
TessBaseAPI tessBaseAPI = new TessBaseAPI();
// Initialize tesseract-ocr
if (!tessBaseAPI.Init(dataPath, language, oem))
{
throw new Exception("Could not initialize tesseract.");
}
// Set the Page Segmentation mode
tessBaseAPI.SetPageSegMode(psm);
// Set the input image
Pix pix = tessBaseAPI.SetImage(inputFile);
// Recognize image
tessBaseAPI.Recognize();
//ensure input name is set
tessBaseAPI.SetInputName(inputFile);
var fileInfo = new System.IO.FileInfo(inputFile);
string tessDataPath = tessBaseAPI.GetDatapath();
string outputName = fileInfo.FullName.Replace(fileInfo.Extension, string.Empty); //input name.pdf
// call pdf renderer and export pdf
using (var pdfRenderer = new PdfRenderer(outputName, tessDataPath, false))
{
pdfRenderer.BeginDocument("tesseract.net searchable Pdf generation");
pdfRenderer.AddImage(tessBaseAPI);
pdfRenderer.EndDocument();
}
tessBaseAPI.Dispose();
pix.Dispose();
}
static void example3()
{
string dataPath = "./tessdata/";
//string language = "eng";
string language = "chi_sim";
string inputFile = "./input.png";
OcrEngineMode oem = OcrEngineMode.DEFAULT;
PageSegmentationMode psm = PageSegmentationMode.AUTO_OSD;
TessBaseAPI tessBaseAPI = new TessBaseAPI();
// Initialize tesseract-ocr
if (!tessBaseAPI.Init(dataPath, language, oem))
{
throw new Exception("Could not initialize tesseract.");
}
// Set the Page Segmentation mode
tessBaseAPI.SetPageSegMode(psm);
// Set the input image
Pix pix = tessBaseAPI.SetImage(inputFile);
// Recognize image
tessBaseAPI.Recognize();
ResultIterator resultIterator = tessBaseAPI.GetIterator();
// extract text from result iterator
StringBuilder stringBuilder = new StringBuilder();
PageIteratorLevel pageIteratorLevel = PageIteratorLevel.RIL_PARA;
do
{
stringBuilder.Append(resultIterator.GetUTF8Text(pageIteratorLevel));
} while (resultIterator.Next(pageIteratorLevel));
tessBaseAPI.Dispose();
pix.Dispose();
}
static void Main(string[] args)
{
if (args.Length == 0)
{
printUsage("");
return;
}
if ((args.Length == 1 && args[0] == "-v") || (args.Length == 1 && args[0] == "--version"))
{
Console.WriteLine(string.Format("tesseract-{0}", TessBaseAPI.Version()));
Console.ReadKey();
return;
}
string lang = "eng";
string image = "";
string output = "";
PageSegMode pagesegmode = PageSegMode.PSM_AUTO;
int arg = 0;
int argc = args.Length;
while (arg < argc && (output == string.Empty || args[arg].StartsWith("-")))
{
if (args[arg] == "-l" && arg + 1 < argc)
{
lang = args[arg + 1];
++arg;
}
else if (args[arg] == "-psm" && arg + 1 < argc)
{
//assign pagesegmode
++arg;
}
else if (image == string.Empty)
{
image = args[arg];
}
else if (output == string.Empty)
{
output = args[arg];
}
++arg;
}
if (string.IsNullOrEmpty(output))
{
printUsage(args[0]);
return;
}
TessBaseAPI api = new TessBaseAPI();
api.SetOutputName(output);
api.SetPageSegMode(pagesegmode);
api.Init(args[0],
lang,
OcrEngineMode.OEM_DEFAULT,
args[arg - 1],
argc - arg,
null,
null,
false);
Console.WriteLine(string.Format("Tesseract Open Source OCR Engine v{0} with Leptonica\n",
TessBaseAPI.Version()));
string text_out = string.Empty;
if (!api.ProcessPages(image, null, 0, ref text_out))
{
Console.WriteLine("Error during processing.\n");
}
bool output_hocr = false;
api.GetBoolVariable("tessedit_create_hocr", ref output_hocr);
bool output_box = false;
api.GetBoolVariable("tessedit_create_boxfile", ref output_box);
string outfile = output;
outfile += output_hocr ? ".html" : output_box ? ".box" : ".txt";
File.WriteAllText(outfile, text_out);
}
static void Main(string[] args)
{
if (args.Length == 0)
{
printUsage("");
return;
}
if ((args.Length == 1 && args[0] == "-v") || (args.Length == 1 && args[0] == "--version"))
{
Console.WriteLine(string.Format("tesseract-{0}",TessBaseAPI.Version()));
Console.ReadKey();
return;
}
string lang = "eng";
string image = "";
string output = "";
PageSegMode pagesegmode = PageSegMode.PSM_AUTO;
int arg = 0;
int argc = args.Length;
while (arg < argc && (output == string.Empty || args[arg].StartsWith("-")))
{
if (args[arg] == "-l" && arg + 1 < argc)
{
lang = args[arg + 1];
++arg;
}
else if (args[arg] == "-psm" && arg + 1 < argc)
{
//assign pagesegmode
++arg;
}
else if (image == string.Empty)
{
image = args[arg];
}
else if (output == string.Empty)
{
output = args[arg];
}
++arg;
}
if (string.IsNullOrEmpty(output))
{
printUsage(args[0]);
return;
}
TessBaseAPI api = new TessBaseAPI();
api.SetOutputName(output);
api.SetPageSegMode(pagesegmode);
api.Init(args[0],
lang,
OcrEngineMode.OEM_DEFAULT,
args[arg-1],
argc-arg,
null,
null,
false);
Console.WriteLine(string.Format("Tesseract Open Source OCR Engine v{0} with Leptonica\n",
TessBaseAPI.Version()));
string text_out=string.Empty;
if (!api.ProcessPages(image, null, 0, ref text_out))
{
Console.WriteLine("Error during processing.\n");
}
bool output_hocr = false;
api.GetBoolVariable("tessedit_create_hocr", ref output_hocr);
bool output_box = false;
api.GetBoolVariable("tessedit_create_boxfile", ref output_box);
string outfile = output;
outfile += output_hocr ? ".html" : output_box ? ".box" : ".txt";
File.WriteAllText(outfile, text_out);
}
