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Use ocrx_cinfo to hold character box and confidence information

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With hocr_char_boxes enabled in hocr output, each grapheme now gets
its own span tag, which holds the character confidence and box
coordinates. Using x_bboxes at the ocrx_word level was
inappropriate, as it was impossible to find which grapheme was
represented by each bounding box.
This commit is contained in:
Nick White 2016-05-06 13:03:39 +01:00
parent 06b7a7b188
commit d71133a769
1 changed files with 23 additions and 19 deletions
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32
api/baseapi.cpp
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@ -1582,37 +1582,41 @@ char* TessBaseAPI::GetHOCRText(struct ETEXT_DESC* monitor, int page_number) {
default: // Do nothing.
break;
}
hocr_str += "'>";
if (bold) hocr_str += "<strong>";
if (italic) hocr_str += "<em>";
word = "";
if (hocr_boxes) {
hocr_str += "; x_bboxes";
}
do {
const char *grapheme = res_it->GetUTF8Text(RIL_SYMBOL);
if (grapheme && grapheme[0] != 0) {
word += HOcrEscape(grapheme);
}
delete []grapheme;
if (hocr_boxes) {
res_it->BoundingBox(RIL_SYMBOL, &left, &top, &right, &bottom);
hocr_str += "<span class='ocrx_cinfo' title='x_bboxes";
hocr_str.add_str_int(" ", left);
hocr_str.add_str_int(" ", top);
hocr_str.add_str_int(" ", right);
hocr_str.add_str_int(" ", bottom);
hocr_str += "; x_conf";
hocr_str.add_str_int(" ", res_it->Confidence(RIL_SYMBOL));
hocr_str += "'>";
}
hocr_str += HOcrEscape(grapheme);
if (hocr_boxes) {
hocr_str += "</span>";
}
}
delete []grapheme;
res_it->Next(RIL_SYMBOL);
} while (!res_it->Empty(RIL_BLOCK) && !res_it->IsAtBeginningOf(RIL_WORD));
hocr_str += "'>";
bool last_word_in_line = res_it->IsAtFinalElement(RIL_TEXTLINE, RIL_WORD);
bool last_word_in_para = res_it->IsAtFinalElement(RIL_PARA, RIL_WORD);
bool last_word_in_block = res_it->IsAtFinalElement(RIL_BLOCK, RIL_WORD);
if (bold) hocr_str += "<strong>";
if (italic) hocr_str += "<em>";
hocr_str += word;
if (italic) hocr_str += "</em>";
if (bold) hocr_str += "</strong>";
hocr_str += "</span> ";
bool last_word_in_line = res_it->IsAtFinalElement(RIL_TEXTLINE, RIL_WORD);
bool last_word_in_para = res_it->IsAtFinalElement(RIL_PARA, RIL_WORD);
bool last_word_in_block = res_it->IsAtFinalElement(RIL_BLOCK, RIL_WORD);
wcnt++;
// Close any ending block/paragraph/textline.
if (last_word_in_line) {