Yes, unmanaged DLLs are loaded in the process, not in the app. Domain. Thus you need to start new process with some command line arguments for OCR task. This will significantly reduce performance.
It will be better if some of the core tesseract team just find and fix the memory leak problems. Svetlin Nakov -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Remi Thomas Sent: Monday, September 21, 2009 10:30 AM To: tesseract-ocr Subject: Re: memory problem Hi, It'll not work because this is unmanaged memory leak. Unmanaged memory is clean up when process finish. The only solution is to start a new process for OCR. http://social.msdn.microsoft.com/Forums/en-US/clr/thread/20de15d6-3111-4c2e- a04b-feb341a67ebc Remi On Sep 20, 6:29 am, nicdnepr <[email protected]> wrote: > i tried msdn method with dynamically load\unload assembly to domain, but it > still eat much memory > > my code is > > Bitmap b = new Bitmap(@"d:\0.bmp"); > AppDomainSetup setup = new AppDomainSetup(); > // setup.ApplicationBase = @"c:\temp\"; > AssemblyName assName = AssemblyName.GetAssemblyName(ass); > Evidence baseEvidence = AppDomain.CurrentDomain.Evidence; > Evidence evidence = new Evidence(baseEvidence); > AppDomain newDomain = AppDomain.CreateDomain("newDomain", > evidence, setup); > Assembly a = newDomain.Load(assName); > > Type myType = a.GetType("tessnet2.Tesseract"); > MethodInfo mymethod = myType.GetMethod("Init"); > Object obj = Activator.CreateInstance(myType); > mymethod.Invoke(obj, new object[] { null, "eng", false }); > mymethod = myType.GetMethod("DoOCR"); > obj = Activator.CreateInstance(myType); > > object o = mymethod.Invoke(obj, new object[] { b, > Rectangle.Empty }); > > label1.Text = ((List<tessnet2.Word>)o)[0].Text; > > AppDomain.Unload(newDomain); > > 2009/9/18 Svetlin Nakov <[email protected]> > > > > > It is well known that Tesseract has multiple memory leaks so I think you > > can > > periodically unload the managed wrapper .NET assembly and load again. To do > > so you could load it in a separate application domain and unload the entire > > domain and re-create it periodically (e.g. when the memory consumption > > reaches some threshold). > > > See more about application domains, loading and unloading assemblies at > > runtuime here:http://msdn.microsoft.com/en-us/library/ms173101.aspx > > > Regards, > > > Svetlin Nakov > > Managing Partner > > Consulting and Information Technology Agency > >http://www.citagency.eu > > > -----Original Message----- > > From: [email protected] [mailto: > > [email protected]] > > On Behalf Of nicdnepr > > Sent: Friday, September 18, 2009 3:06 PM > > To: tesseract-ocr > > Subject: memory problem > > > hi > > i use Tessnet2 a .NET 2.0 Open Source OCR assembly using Tesseract > > engine > > from articlehttp://www.pixel-technology.com/freeware/tessnet2/ > > after 1000 persed images i have 500 MB memory used in program. how can > > i resolve this? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en -~----------~----~----~----~------~----~------~--~---
