Hello, I'd like to know how Tesseract reallt deal with the recognized result. Or I need to produce a hocr file and read from it to get position information, that doesn't sound good....
Le lundi 16 juillet 2012 16:43:31 UTC+2, sventech a écrit : > > hOCR output includes character location -- look into that. > --Sven > > On Sat, Jul 14, 2012 at 7:07 AM, moka <[email protected] <javascript:>> > wrote: > > I used the source code by "tesseractdotnet", it can get characters > position. > > > > "tesseractdotnet" based-on tesseract-ocr v3.01 r590. > > > > When I get the tesseract 3.02 r729 from svn, and use the under code on > > Windows XP(VS2008), > > > > bool succed = api->Recognize(monitor) >= 0; > > succed return true, > > int nChars = head->count; > > the nChars is always zero. > > how to get characters position in tesseract 3.02 r729? > > > > detail code: > > > > int main(int argc, char **argv) { > > > > char* image1 = "c:\\eurotext.tif"; > > char* lang1 = "eng"; > > int psm = 3; > > char* text = new char[1024]; > > int rc = 0; > > > > rc = image2text(image1,lang1,psm,text); > > > > printf("text: %s\n", text); > > } > > > > int image2text(const char* image,const char* lang,int psm,char* > textout){ > > tesseract::PageSegMode pagesegmode = tesseract::PSM_AUTO; > > pagesegmode = static_cast<tesseract::PageSegMode>(psm); > > > > tesseract::TessBaseAPI api; > > > > // initialize monitor > > ETEXT_DESC* monitor = NULL; > > ETEXT_DESC* head = NULL; > > int fixed_buffer_factor = 100; > > int MAX_CHAR_RECOGNIZE = 32000; > > int n = 127; > > monitor = new ETEXT_DESC[fixed_buffer_factor*n]; > > monitor[1].more_to_come = 127; > > monitor[1].count = 0; > > > > > > // initialize api > > int rc = api.Init(image, lang, tesseract::OEM_DEFAULT); > > if (rc) { > > // fprintf(stderr, "Could not initialize tesseract.\n"); > > return 1; > > } > > > > // We have 2 possible sources of pagesegmode: a config file and > > // the command line. For backwards compatability reasons, the > > // default in tesseract is tesseract::PSM_SINGLE_BLOCK, but the > > // default for this program is tesseract::PSM_AUTO. We will let > > // the config file take priority, so the command-line default > > // can take priority over the tesseract default, so we use the > > // value from the command line only if the retrieved mode > > // is still tesseract::PSM_SINGLE_BLOCK, indicating no change > > // in any config file. Therefore the only way to force > > // tesseract::PSM_SINGLE_BLOCK is from the command line. > > // It would be simpler if we could set the value before Init, > > // but that doesn't work. > > if (api.GetPageSegMode() == tesseract::PSM_SINGLE_BLOCK) > > api.SetPageSegMode(pagesegmode); > > > > FILE* fin = fopen(image, "rb"); > > if (fin == NULL) { > > // printf("Cannot open input file: %s\n", image); > > return 2; > > } > > fclose(fin); > > > > PIX *pixs; > > if ((pixs = pixRead(image)) == NULL) { > > // printf("Unsupported image type.\n"); > > return 3; > > } > > > > // detect characters > > api.Clear(); > > api.ClearAdaptiveClassifier(); > > try > > { > > api.SetImage(pixs); > > bool succed = api.Recognize(monitor) >= 0; > > char* text = api.GetUTF8Text(); > > sprintf(textout, "%s", text); > > delete text; > > > > head = &monitor[1]; > > > > int lineIndex=0; > > int lineIdx = 0; > > int nChars = head->count; > > int i = 0; > > while (i < nChars) > > { > > // typedef struct { /*single character */ > > // It should be noted that the format for char_code for > version > > 2.0 and beyond > > // is UTF8 which means that ASCII characters will come out > as > > one structure but > > // other characters will be returned in two or more > instances of > > this structure > > // with a single byte of the UTF8 code in each, but each > will > > have the same > > // bounding box. Programs which want to handle languagues > with > > different > > // characters sets will need to handle extended characters > > appropriately, but > > // *all* code needs to be prepared to receive UTF8 coded > > characters for > > // characters such as bullet and fancy quotes. > > // uinT16 char_code; /*character itself */ > > // inT16 left; /*of char (-1) */ > > // inT16 right; /*of char (-1) */ > > // inT16 top; /*of char (-1) */ > > // inT16 bottom; /*of char (-1) */ > > // inT16 font_index; /*what font (0) */ > > // uinT8 confidence; /*0=perfect, 100=reject > > (0/100) */ > > // uinT8 point_size; /*of char, 72=i inch, > (10) */ > > // inT8 blanks; /*no of spaces before > this > > char (1) */ > > // uinT8 formatting; /*char formatting (0) */ > > //} EANYCODE_CHAR; /*single character */ > > > > > > EANYCODE_CHAR* ch = &(head + i)->text[0]; > > printf("%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,", ch->char_code, > > ch->left, ch->top, ch->right, ch->bottom, ch->font_index, > ch->confidence, > > ch->point_size, ch->formatting); > > i++; /*go to next char*/ > > } /* end while */ > > > > } > > catch (...) > > { > > > > } > > > > head = NULL; > > monitor = NULL; > > > > pixDestroy(&pixs); > > > > return 0; > > } > > > > > > > > > > > > > > -- > > 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]<javascript:> > > To unsubscribe from this group, send email to > > [email protected] <javascript:> > > For more options, visit this group at > > http://groups.google.com/group/tesseract-ocr?hl=en > > > > -- > ``All that is gold does not glitter, > not all those who wander are lost; > the old that is strong does not wither, > deep roots are not reached by the frost. > From the ashes a fire shall be woken, > a light from the shadows shall spring; > renewed shall be blade that was broken, > the crownless again shall be king.” > -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. 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