int
main (int argc, char * argv[]) {
ho_pixbuf * pix = NULL;
ho_pixbuf * pix_temp = NULL;
ho_objmap * obj = NULL;
ho_pixsum * sums = NULL;
int i;
/* read image and convert to bw */
/* ---------------------------- */
/* try to read pnm files */
pix = ho_pixbuf_pnm_load_path("./images/p6.pnm");
ho_pixbuf_pnm_save_path(pix, "t-p6.pnm");
/* convert image to gray and then to b/w */
ho_pixbuf_filter_gray(pix);
ho_pixbuf_filter_polarize(pix, 150);
ho_pixbuf_pnm_save_path(pix, "t-bw-p6.pnm");
/* run layout filters */
/* ------------------ */
/* filter by size */
ho_pixbuf_layout_filter (pix, 0, 10, 100, 10, 100);
/* smear image */
//ho_pixbuf_filter_hsmear (pix, 0, 0, 10, 0);
//ho_pixbuf_filter_vsmear (pix, 0, 0, 10, 0);
//ho_pixbuf_op_mov (pix, 0, 1);
/* create a sums transforamtion of pix */
sums = ho_pixsum_new(pix->width, pix->height);
ho_pixsum_from_pixbuf(sums, pix, 0);
/* segment the image verticaly using the sums map */
ho_pixbuf_layout_segment_vertical (pix, sums, 0,
0, 0, pix->width, pix->height, 0.05);
/* connect small gaps between vertical segments, using smear */
/* ho_pixbuf_filter_hsmear */
/* (pix = pix, chanel = 0, value = 255, gap = 5, moment = 0) */
ho_pixbuf_filter_hsmear (pix, 0, 0, 5, 0);
/* create objmap */
obj = ho_objmap_new(pix->width, pix->height);
ho_objmap_from_pixbuf (obj, pix, 0);
/* loop on all the objects and dump to disk */
for (i = 1; i <= ho_objmap_get_size(obj); i++) {
printf("o%d %d %d %d %d 0\n", i,
ho_objmap_get_object(obj,i).x,
pix->height - ho_objmap_get_object(obj,i).y - ho_objmap_get_object(obj,i).height,
ho_objmap_get_object(obj,i).x + ho_objmap_get_object(obj,i).width,
pix->height - ho_objmap_get_object(obj,i).y);
ho_pixbuf_layout_segment_horizontal (pix, sums, 0,
ho_objmap_get_object(obj,i).x, ho_objmap_get_object(obj,i).y,
ho_objmap_get_object(obj,i).width, ho_objmap_get_object(obj,i).height,
0.12);
}
//ho_pixbuf_filter_vsmear (pix, 1, 255, 5, 0);
//ho_pixbuf_layout_filter_by_height (pix, 1, 10, 120);
//ho_pixbuf_layout_smear(pix, 1, 10, 120);
/* draw a grid with: step_size=100, channel=1, value=0 */
ho_pixbuf_draw_grid (pix, 100, 2, 0);
/* save layout image */
ho_pixbuf_pnm_save_path(pix, "t-p6-layout.pnm");
ho_objmap_free(obj);
ho_pixbuf_free(pix_temp);
ho_pixbuf_free(pix);
return 0;
}
int
ho_recognize_nikud_dimentions (const ho_bitmap * m_text,
const ho_bitmap * m_mask, double *height,
double *width, double *top, double *bottom,
double *top_left, double *top_mid, double *top_right,
double *mid_left, double *mid_right,
double *bottom_left, double *bottom_mid,
double *bottom_right,
double *dots_above, double *dots_below, double *dots_inside,
double *objs_above, double *objs_below, double *objs_inside,
double *main_obj_height, double *main_obj_width,
double *top_dot_x, double *inside_dot_x, double *font_width_by_height)
{
int i, x, y;
int obj_width, obj_height;
int obj_x, obj_y;
int obj_w, obj_h;
int line_start, line_end, line_height;
int sum, font_start_x, font_end_x, font_height, font_width;
int font_start_y, font_end_y;
ho_objmap *o_obj = NULL;
unsigned char is_dot, is_obj;
/* init values to zero */
*height = 0.0;
*width = 0.0;
*top = 0.0;
*bottom = 0.0;
*top_left = 0.0;
*top_mid = 0.0;
*top_right = 0.0;
*mid_left = 0.0;
*mid_right = 0.0;
*bottom_left = 0.0;
*bottom_mid = 0.0;
*bottom_right = 0.0;
*dots_above = 0.0;
*dots_below = 0.0;
*dots_inside = 0.0;
*objs_above = 0.0;
*objs_below = 0.0;
*objs_inside = 0.0;
*top_dot_x = 0.0;
*inside_dot_x = 0.0;
*font_width_by_height = 0.0;
/* get line start and end */
x = m_mask->width / 2;
for (y = 0; y < m_mask->height && !ho_bitmap_get (m_mask, x, y); y++) ;
line_start = y - 1;
for (; y < m_mask->height && ho_bitmap_get (m_mask, x, y); y++) ;
line_end = y;
line_height = line_end - line_start;
if (line_height < 4 || m_text->width < 4)
return TRUE;
*font_width_by_height = (double) m_mask->width / (double) line_height;
/* get all the objects of nikud */
o_obj = ho_objmap_new_from_bitmap (m_text);
if (!o_obj)
return TRUE;
/* if no nikud just return */
if (ho_objmap_get_size (o_obj) == 0)
{
ho_objmap_free (o_obj);
return FALSE;
}
/* count points and objects above/in/below font */
obj_x = 0;
obj_y = 0;
obj_w = 0;
obj_h = 0;
for (i = 0; i < ho_objmap_get_size (o_obj); i++)
{
/* is this object inside line ? */
y = ho_objmap_get_object (o_obj, i).y;
x = ho_objmap_get_object (o_obj, i).x;
obj_width = ho_objmap_get_object (o_obj, i).width;
obj_height = ho_objmap_get_object (o_obj, i).height;
is_dot = (obj_height < line_height / 4 && obj_height > line_height / 16
&& obj_width < line_height / 4 && obj_width > line_height / 16);
is_obj = (obj_height > line_height / 4 || obj_width > line_height / 4);
if (is_dot)
{
/* count */
if ((y + obj_height / 2) < line_start)
{
(*dots_above) += 0.1;
*top_dot_x = (double) x / (double) (m_text->width);
}
else if ((y + obj_height / 2) > line_end)
{
(*dots_below) += 0.1;
}
else
{
(*dots_inside) += 0.1;
*inside_dot_x = (double) x / (double) (m_text->width);
}
}
else if (is_obj)
{
/* count */
if ((y + obj_height / 2) < line_start)
{
(*objs_above) += 0.1;
}
else if ((y + obj_height / 2) > line_end)
{
(*objs_below) += 0.1;
/* get metrics of bigest obj under font */
if (obj_width > *width)
{
obj_x = x;
obj_y = y;
obj_w = obj_width;
obj_h = obj_height;
}
}
else
{
(*objs_inside) += 0.1;
}
}
}
/* free obj map */
ho_objmap_free (o_obj);
/* if nothing below font we are finished */
if (!(*objs_below) && !(*dots_below))
return FALSE;
/* get nikud metrics */
*main_obj_height = 2.0 * (double) obj_h / (double) line_height;
*main_obj_width = 2.0 * (double) obj_w / (double) line_height;
if (obj_y && obj_h)
{
*top = 2.0 * (double) (obj_y - line_end) / (double) line_height;
*bottom =
2.0 * (double) ((obj_y + obj_h) - line_end) / (double) line_height;
}
/* get nikud start and end */
sum = 0;
for (y = line_end + 1; y < m_text->height && sum == 0; y++)
for (sum = 0, x = 1; x < (m_text->width - 1); x++)
sum += ho_bitmap_get (m_text, x, y);
font_start_y = y - 1;
sum = 0;
for (y = m_text->height - 1; y > font_start_y && sum == 0; y--)
for (sum = 0, x = 1; x < (m_text->width - 1); x++)
sum += ho_bitmap_get (m_text, x, y);
font_end_y = y + 1;
font_height = font_end_y - font_start_y;
if (!font_height)
return TRUE;
*height = 2.0 * (double) font_height / (double) line_height;
sum = 0;
for (x = 2; x < m_text->width && sum == 0; x++)
for (sum = 0, y = line_end; y < (m_text->height - 1); y++)
sum += ho_bitmap_get (m_text, x, y);
font_start_x = x - 1;
sum = 0;
for (sum = 0, x = m_text->width - 2; x > (font_start_x + 1) && sum == 0; x--)
for (sum = 0, y = line_end; y < (m_text->height - 1); y++)
sum += ho_bitmap_get (m_text, x, y);
font_end_x = x + 1;
font_width = font_end_x - font_start_x;
if (!font_width)
return TRUE;
*width = 2.0 * (double) font_width / (double) line_height;
/* get nikud egdes */
for (y = font_start_y, x = font_start_x;
x < font_end_x && y < (font_end_y)
&& !ho_bitmap_get (m_text, x, y); x++, y++) ;
*top_left = (double) (x - font_start_x) / (double) (line_height / 4);
if (*top_left > 1.0)
*top_left = 1.0;
for (y = font_end_y, x = font_start_x;
x < font_end_x && y > (font_start_y)
&& !ho_bitmap_get (m_text, x, y); x++, y--) ;
*bottom_left = (double) (x - font_start_x) / (double) (line_height / 4);
if (*bottom_left > 1.0)
*bottom_left = 1.0;
for (y = font_start_y, x = font_end_x - 1;
x > font_start_x && y < (font_end_y)
&& !ho_bitmap_get (m_text, x, y); x--, y++) ;
*top_right = (double) (font_end_x - x) / (double) (line_height / 4);
if (*top_right > 1.0)
*top_right = 1.0;
for (y = font_end_y, x = font_end_x - 1;
x > font_start_x && y > font_start_y
&& !ho_bitmap_get (m_text, x, y); x--, y--) ;
*bottom_right = (double) (font_end_x - x) / (double) (line_height / 4);
if (*bottom_right > 1.0)
*bottom_right = 1.0;
for (y = font_start_y, x = font_start_x + font_width / 2;
y < (font_start_y + font_height) && !ho_bitmap_get (m_text, x, y); y++) ;
*top_mid = (double) (y - font_start_y) / (double) (line_height / 4);
if (*top_mid > 1.0)
*top_mid = 1.0;
for (y = font_end_y, x = font_start_x + font_width / 2;
y > (font_start_y + font_height) && !ho_bitmap_get (m_text, x, y); y--) ;
*bottom_mid = (double) (font_end_y - y) / (double) (line_height / 4);
if (*bottom_mid > 1.0)
*bottom_mid = 1.0;
for (y = font_start_y + font_height / 2, x = font_start_x;
x < (font_end_x) && !ho_bitmap_get (m_text, x, y); x++) ;
*mid_left = (double) (x - font_start_x) / (double) (line_height / 4);
if (*mid_left > 1.0)
*mid_left = 1.0;
for (y = font_start_y + font_height / 2, x = font_end_x - 1;
x > (font_start_x) && !ho_bitmap_get (m_text, x, y); x--) ;
*mid_right = (double) (font_end_x - x) / (double) (line_height / 4);
if (*mid_right > 1.0)
*mid_right = 1.0;
return FALSE;
}
