ho_bitmap *
ho_bitmap_edge (const ho_bitmap * m, const int n)
{
ho_bitmap *m_out;
ho_bitmap *m_temp1;
ho_bitmap *m_temp2;
int i;
m_temp1 = ho_bitmap_clone (m);
if (!m_temp1)
return NULL;
for (i = 0; i < n; i++)
{
m_temp2 = ho_bitmap_erosion (m_temp1);
ho_bitmap_free (m_temp1);
if (!m_temp2)
return NULL;
m_temp1 = m_temp2;
}
m_out = ho_bitmap_clone (m);
if (!m_out)
return NULL;
m_out->x = m->x;
m_out->y = m->y;
m_out->type = m->type;
m_out->font_height = m->font_height;
m_out->font_width = m->font_width;
m_out->font_spacing = m->font_spacing;
m_out->line_spacing = m->line_spacing;
m_out->avg_line_fill = m->avg_line_fill;
m_out->com_line_fill = m->com_line_fill;
m_out->nikud = m->nikud;
ho_bitmap_andnot (m_out, m_temp1);
ho_bitmap_free (m_temp1);
return m_out;
}
/**
fill a text buffer with fonts recognized from a page layout
@param l_page the page layout to recognize
@param s_text_out the text buffer to fill
@param html output format is html
@param font_code code for the font to use
@param nikud recognize nikud
@param progress a progress indicator 0..100
@return FALSE
*/
int hocr_font_recognition( const ho_layout* l_page, ho_string* s_text_out, HEBOCR_FONT_OPTIONS *font_options, int html, int* progress )
{
int block_index;
int line_index;
int word_index;
int font_index;
int current_font_number = 0;
int number_of_fonts = l_page->number_of_fonts;
ho_bitmap *m_text = NULL;
ho_bitmap *m_mask = NULL;
ho_bitmap *m_font_main_sign = NULL;
ho_bitmap *m_font_nikud = NULL;
char text_out[200];
const char *font;
const char *font_nikud;
const char *font_dagesh;
const char *font_shin;
/* init progress */
*progress = 0;
/* did we get a text buffer and a layout ? */
if (!s_text_out || !l_page)
return TRUE;
/* loop over the layout */
for (block_index = 0; block_index < l_page->n_blocks; block_index++)
{
/* start of paragraph */
if (html)
{
/* FIXME: text overflow ?! */
sprintf (text_out,
" <div class=\"ocr_par\" id=\"par_%d\" title=\"bbox %d %d %d %d\">\n",
block_index + 1, l_page->m_blocks_text[block_index]->x,
l_page->m_blocks_text[block_index]->y,
l_page->m_blocks_text[block_index]->x +
l_page->m_blocks_text[block_index]->width,
l_page->m_blocks_text[block_index]->y +
l_page->m_blocks_text[block_index]->height);
ho_string_cat (s_text_out, text_out);
}
for (line_index = 0; line_index < l_page->n_lines[block_index];
line_index++)
{
/* start of line */
/* loop on all the words in this line */
for (word_index = 0;
word_index < l_page->n_words[block_index][line_index]; word_index++)
{
int word_length = l_page->n_fonts[block_index][line_index][word_index];
unsigned char word_end = FALSE;
unsigned char word_start = TRUE;
int last_char_i = 0;
int char_i = 0;
/* start of word */
for (font_index = 0; font_index < word_length; font_index++)
{
word_end = (font_index == (word_length - 1));
word_start = (font_index == 0);
/* get font images */
/* get the font */
m_text =
ho_layout_get_font_text (l_page, block_index,
line_index, word_index, font_index);
if (!m_text)
return TRUE;
/* get font line mask */
m_mask =
ho_layout_get_font_line_mask (l_page, block_index,
line_index, word_index, font_index);
if (!m_mask)
return TRUE;
/* get font main sign */
m_font_main_sign = ho_font_main_sign (m_text, m_mask);
if (!m_font_main_sign)
return TRUE;
/* recognize font from images */
last_char_i = char_i;
font =
ho_recognize_font (m_font_main_sign, m_mask,
font_options->font_code, font_options->do_linguistics, word_end, word_start, &char_i,
last_char_i);
/* insert font to text out */
ho_string_cat (s_text_out, font);
/* get font nikud */
if (font_options->nikud)
{
m_font_nikud = ho_bitmap_clone (m_text);
if (!m_font_nikud)
return TRUE;
ho_bitmap_andnot (m_font_nikud, m_font_main_sign);
/* recognize font from images */
font_nikud = ho_recognize_nikud (m_font_nikud, m_mask,
font_options->font_code, &font_dagesh, &font_shin);
/* free bitmaps */
ho_bitmap_free (m_font_nikud);
m_font_nikud = NULL;
/* insert font nikud to text out */
ho_string_cat (s_text_out, font_shin);
ho_string_cat (s_text_out, font_dagesh);
ho_string_cat (s_text_out, font_nikud);
}
/* free bitmaps */
ho_bitmap_free (m_font_main_sign);
ho_bitmap_free (m_text);
ho_bitmap_free (m_mask);
/* this are empty pointers */
m_text = m_mask = m_font_main_sign = NULL;
/* update progress */
current_font_number++;
*progress = 100 * current_font_number / number_of_fonts;
}
/* end of word */
ho_string_cat (s_text_out, " ");
}
/* end of line */
if (html)
ho_string_cat (s_text_out, "<br/>\n");
else
ho_string_cat (s_text_out, "\n");
}
/* end of block */
if (html)
ho_string_cat (s_text_out, "<br/>\n </div>\n");
else
ho_string_cat (s_text_out, "\n");
}
return FALSE;
}
