Recognize Method (original) (raw)
Summary
Recognizes the OCR data found on this IOcrPage.
Syntax
C#
Objective-C
C++/CLI
Java
Python
- (BOOL)recognize:(nullable LTOcrProgressHandler)progressHandler error:(NSError **)error public void recognize(OcrProgressListener callback) Parameters
callback
Optional callback to show operation progress.
Example
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Ocr;
using Leadtools.Forms.Common;
using Leadtools.Document.Writer;
using Leadtools.WinForms;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
public void OcrPageExample()
{
string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif");
string pdfFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.pdf");
// Create an instance of the engine
using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD))
{
// Start the engine using default parameters
ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir);
// Create an OCR document
using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument())
{
// Add this image to the document
IOcrPage ocrPage = ocrDocument.Pages.AddPage(tifFileName, null);
// Auto-recognize the zones in the page
ocrPage.AutoZone(null);
// Show its information
Console.WriteLine("Size: {0} by {1} pixels", ocrPage.Width, ocrPage.Height);
Console.WriteLine("Resolution: {0} by {1} dots/inch", ocrPage.DpiX, ocrPage.DpiX);
Console.WriteLine("Bits/Pixel: {0}, Bytes/Line: {1}", ocrPage.BitsPerPixel, ocrPage.BytesPerLine);
byte[] palette = ocrPage.GetPalette();
int paletteEntries;
if (palette != null)
paletteEntries = palette.Length / 3;
else
paletteEntries = 0;
Console.WriteLine("Number of entries in the palette: {0}", paletteEntries);
Console.WriteLine("Original format of this page: {0}", ocrPage.OriginalFormat);
Console.WriteLine("Has this page been recognized? : {0}", ocrPage.IsRecognized);
ShowZonesInfo(ocrPage);
// Recognize it and save it as PDF
ocrPage.Recognize(null);
ocrDocument.Save(pdfFileName, DocumentFormat.Pdf, null);
}
// Shutdown the engine
// Note: calling Dispose will also automatically shutdown the engine if it has been started
ocrEngine.Shutdown();
}
}
private void ShowZonesInfo(IOcrPage ocrPage)
{
Console.WriteLine("Zones:");
foreach (OcrZone ocrZone in ocrPage.Zones)
{
int index = ocrPage.Zones.IndexOf(ocrZone);
Console.WriteLine("Zone index: {0}", index);
Console.WriteLine(" Id {0}", ocrZone.Id);
Console.WriteLine(" Bounds {0}", ocrZone.Bounds);
Console.WriteLine(" ZoneType {0}", ocrZone.ZoneType);
Console.WriteLine(" CharacterFilters: {0}", ocrZone.CharacterFilters);
Console.WriteLine("----------------------------------");
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
public const string OcrLEADRuntimeDir = @"C:\LEADTOOLS22\Bin\Common\OcrLEADRuntime";
}