Maybe you don't need all these details but at least this can be useful for other forum users. The rules are a bit complex.
As Quan said, Tesseract first looks if the TESSDATA_PREFIX environment variable exists. If it does, Tess then appends to it the string stored in the "m_data_sub_dir" param. The resulting dir name is where Tess looks for lang files. Now the hard part: - If the environment variable does not exist, under Windows Tess checks if it's run via a DLL or linked statically into an EXE. Whichever is in effect, its location is taken as a base directory. The name of the DLL being checked is stored in the "tessedit_module_name" config param, default is "tessdll.dll". - If for some reason Tess cannot obtain executable's file name, as a base directory it takes the current working directory (namely "./"). - By default "m_data_sub_dir" is "tessdata/" but it can be altered via a config file (you can specify it in the command line). - Both the environment variable and "m_data_sub_dir" should contain trailing "/". - Windows installer automatically creates TESSDATA_PREFIX and sets it to "<ProgramFiles>\Tesseract-OCR\". So, if don't want to deal with environment variables, you can stick to a config file and set "m_data_sub_dir" to point to any directory you like using a *relative* path. Well, almost to any. It should be on the same drive. Warm regards, Dmitri Silaev www.CustomOCR.com On Fri, May 20, 2011 at 2:47 PM, Daniel <[email protected]> wrote: > I'm attempting to integrate Tesseract 3 with another stand-alone app, > but I'm running into a problem: Tesseract always looks for the > language files in "\Program Files (x86)\Tesseract-OCR\tessdata"; I > need to store the language files in a different location (a subfolder > of my app's installation folder.) > > I'm assuming Tesseract is getting this folder from the registry, so I > could just change the installation path listed, but (a) I don't want > to break user's possible other installations, and (b) I tried that and > it (inexplicably) didn't work. > > Is there a way to specify the hard path from the command line, or do I > have to modify the code? > > -- > 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 > -- 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
