See https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!searchin/tesseract-ocr/zdenko%7Csort:date/tesseract-ocr/xvTFjYCDRQU/SI6du-4JBAAJ Example how to use tessseract C-API in python with cffi
On Mon, Apr 1, 2019 at 1:23 PM Guru Govindan <[email protected]> wrote: > Hi There, > I recently migrated to tesseract 4 and tried pytesseract. But that is too > slow for the kind of application I am creating. > > I wanted to write my own python wrapper that would use the tesseract.so.4 > directly. > I saw the example on the github page for the same ( > https://github.com/tesseract-ocr/tesseract/wiki/APIExample) > > But I have issues initializing TessBaseAPIInit4(). > > I have multiple variables that I want to set and it keeps getting > segmentation fault. > I am not sure what I am doing wrong. I also tried the C++ version of it. > Please let me know if it is a known problem. > > import os > from ctypes import * > > > lang = "eng" > filename = "/data/framecache/testing.jpg" > libname = "/usr/local/lib/libtesseract.so.4" > > > TESSDATA_PREFIX = os.environ.get('TESSDATA_PREFIX') > if not TESSDATA_PREFIX: > TESSDATA_PREFIX = "/home/vagrant/reelz_base/shared/tessdata" > > > print "TESSDATA_PREFIX={}".format(TESSDATA_PREFIX) > > > tesseract = cdll.LoadLibrary(libname) > tesseract.TessVersion.restype = c_char_p > tesseract_version = tesseract.TessVersion() > > > > > api = tesseract.TessBaseAPICreate() > print api > > > vars_vec = ["tesseract_char_whitelist", > "tessedit_pageseg_mode", > "image_default_resolution"] > > > vars_values = ["ABCDEFGHIJKLMNOPQRSTUVWXYZ", > "6", > "70"] > > > > > vec_arr_type = c_char_p * len(vars_vec) > vars_vec_arr = vec_arr_type() > for i, val in enumerate(vars_vec): > vars_vec_arr[i] = val > > > print "vars_vec_arr={}".format(vars_vec_arr) > > > val_arr_type = c_char_p * len(vars_values) > vars_val_arr = val_arr_type() > > > for i, val in enumerate(vars_values): > vars_val_arr[i] = val > > > print "vars_val_arr={}".format(vars_val_arr) > > > > > > > rc = tesseract.TessBaseAPIInit4(api, TESSDATA_PREFIX, lang , 2, None, 0, > vars_vec_arr, vars_val_arr, 0, c_bool(False)) > > > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/tesseract-ocr. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/10d9034d-f516-405a-be23-fe23d25d8ea4%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/10d9034d-f516-405a-be23-fe23d25d8ea4%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- ____________________________________________________________ भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAG2NduU8d7%2BWcQxVOkLQWHFrMXMMfG4QEQWfU%3DBeEk2_GiiqEA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
