Hi everybody,
I am writing a C# Web Application that must perform OCR over various
TIFF files. I am using the latest tessnet2 release (april 21, 2009).
Here is the codebehind of my page:
tessnet2.Tesseract ocr = null;
string tessImgPath = "";
string tessDataPath = "";
protected void Page_Load(object sender, EventArgs e)
{
InitialiseData();
tessImgPath = Server.MapPath("../Images/P0028594.tif");
Bitmap image = new Bitmap(tessImgPath);
List<tessnet2.Word> m_words;
m_words = ocr.DoOCR(image, Rectangle.Empty);
if (m_words != null)
{
int lc = tessnet2.Tesseract.LineCount(m_words);
for (int i = 0; i < lc; i++)
{
Response.Write(tessnet2.Tesseract.GetLineText
(m_words, i) + "<br>");
}
}
}
void InitialiseData()
{
ocr = new tessnet2.Tesseract();
tessDataPath = Server.MapPath("../tessdata");
ocr.SetRootPath(tessDataPath, "ita");
ocr.Init("ita", false);
}
I have the following problem: if the application is running in Debug
mode, it works correctly, while running in Release mode (or also Start
Without Debugging), the row
ocr.Init("ita", false);
causes following error:
Attempted to read or write protected memory. This is often an
indication that other memory is corrupt.
Here is the Stack Trace:
[AccessViolationException: Attempted to read or write protected
memory. This is often an indication that other memory is corrupt.]
fgets(SByte* , Int32 , _iobuf* ) +0
read_word_list(SByte* filename, UInt64* dawg, Int32 max_num_edges,
Int32 reserved_edges) +562
init_permute() +543
program_editup(SByte* configfile) +335
tessnet2.Tesseract.Init(String lang, Boolean numericMode) +66
SDG_MODI.Web.Home2.Home.InitialiseData() in C:\Produzione
\PROGETTI_NET\SDG_MODI\SDG_MODI\Web\Home2\frm_HOM2.aspx.cs:110
SDG_MODI.Web.Home2.Home.Page_Load(Object sender, EventArgs e) in C:
\Produzione\PROGETTI_NET\SDG_MODI\SDG_MODI\Web\Home2\frm_HOM2.aspx.cs:
28
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp,
Object o, Object t, EventArgs e) +15
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object
sender, EventArgs e) +33
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+1436
What I have to do for avoid this error?
Another question: I need also to show the TIFF image into the Web
page. Actually it seems not possible, so I think I need some code to
perform a conversion between TIFF and, i.e., JPG. Can someone point me
out to some useful code? Thank you!
Best Regards
ZioZione
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