hOCR output includes character location -- look into that. --Sven On Sat, Jul 14, 2012 at 7:07 AM, moka <[email protected]> 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] > 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
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