internal ResultIterator(ResultIterator resultIterator)
{
var pointer = Native.DllImports.TessResultIteratorCopy(resultIterator.handleRef);
if (pointer == IntPtr.Zero)
{
throw new ArgumentNullException("TessBaseAPIGetIterator returned a null pointer");
}
handleRef = new HandleRef(this, pointer);
}
/// <summary>
/// Get a reading-order iterator to the results of LayoutAnalysis and/or
/// Recognize.The returned iterator must be deleted after use.
/// WARNING! This class points to data held within the TessBaseAPI class, and
/// therefore can only be used while the TessBaseAPI class still exists and
/// has not been subjected to a call of Init, SetImage, Recognize, Clear, End
/// DetectOS, or anything else that changes the internal PAGE_RES.
/// </summary>
/// <returns></returns>
public ResultIterator GetIterator()
{
ResultIterator iterator = null;
try
{
iterator = new ResultIterator(this);
}
catch (ArgumentNullException)
{ }
return(iterator);
}
public static ScanResults GetResults(this Tesseract.ResultIterator iter)
{
var llsr = new List <CharResult[]>();
iter.Begin();
if (iter.TryGetBoundingBox(PageIteratorLevel.Symbol, out Rect symbolBounds))
{
var lsr = new List <CharResult>();
using (var choice = iter.GetChoiceIterator())
{
do
{
lsr.Add(new CharResult()
{
Character = choice.GetText().First(),
Confidence = choice.GetConfidence()
});
} while (choice.Next());
}
llsr.Add(lsr.ToArray());
}
while (!iter.IsAtFinalOf(PageIteratorLevel.TextLine, PageIteratorLevel.Symbol))
{
iter.Next(PageIteratorLevel.Symbol);
if (iter.TryGetBoundingBox(PageIteratorLevel.Symbol, out symbolBounds))
{
var lsr = new List <CharResult>();
using (var choice = iter.GetChoiceIterator())
{
do
{
lsr.Add(new CharResult()
{
Character = choice.GetText().First(),
Confidence = choice.GetConfidence()
});
} while (choice.Next());
}
llsr.Add(lsr.ToArray());
}
}
;
return(new ScanResults()
{
Results = llsr.ToArray()
});
}
public void Print(ResultIterator iter)
{
logger.Log("Is beginning of block: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Block));
logger.Log("Is beginning of para: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Para));
logger.Log("Is beginning of text line: {0}", iter.IsAtBeginningOf(PageIteratorLevel.TextLine));
logger.Log("Is beginning of word: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Word));
logger.Log("Is beginning of symbol: {0}", iter.IsAtBeginningOf(PageIteratorLevel.Symbol));
logger.Log("Block text: \"{0}\"", iter.GetText(PageIteratorLevel.Block));
logger.Log("Para text: \"{0}\"", iter.GetText(PageIteratorLevel.Para));
logger.Log("TextLine text: \"{0}\"", iter.GetText(PageIteratorLevel.TextLine));
logger.Log("Word text: \"{0}\"", iter.GetText(PageIteratorLevel.Word));
logger.Log("Symbol text: \"{0}\"", iter.GetText(PageIteratorLevel.Symbol));
}
/// <summary>
/// Processes the specific image.
/// </summary>
/// <remarks>
/// You can only have one result iterator open at any one time.
/// </remarks>
/// <param name="image">The image to process.</param>
/// <param name="region">The image region to process.</param>
/// <returns>A result iterator</returns>
public ResultIterator Process(IPix image, Rect region)
{
if (image == null) throw new ArgumentNullException("image");
if (region.X1 < 0 || region.Y1 < 0 || region.X2 > image.Width || region.Y2 > image.Height)
throw new ArgumentException("The image region to be processed must be within the image bounds.", "region");
if (processCount > 0) throw new InvalidOperationException("Only one image can be processed at once. Please make sure you dispose of the result iterator once your finished with it.");
processCount++;
Interop.TessApi.BaseApiSetImage(handle, image.Handle);
Interop.TessApi.BaseApiSetRectangle(handle, region.X1, region.Y1, region.Width, region.Height);
if (Interop.TessApi.BaseApiRecognize(handle, IntPtr.Zero) != 0) {
throw new InvalidOperationException("failed to process document.");
}
var iteratorHandle = Interop.TessApi.BaseApiGetIterator(handle);
var iterator = new ResultIterator(iteratorHandle);
iterator.Disposed += OnIteratorDisposed;
return iterator;
}
internal PageIterator(ResultIterator resultIterator)
{
handleRef = new HandleRef(this, Native.DllImports.TessResultIteratorGetPageIterator(resultIterator.handleRef));
}
internal ResultIterator(ResultIterator resultIterator)
: base(Native.DllImports.TessResultIteratorCopy((HandleRef)resultIterator))
{
}
internal ChoiceIterator(ResultIterator resultIterator)
: base(Native.DllImports.TessResultIteratorGetChoiceIterator((HandleRef)resultIterator))
{
}