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fixed for offsetted regions. Do thresholding as part of find_max_blob().

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2005-08-08  Sven Neumann  <sven@gimp.org>

	* app/base/siox.c (find_max_blob): fixed for offsetted regions.
	Do thresholding as part of find_max_blob().
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Sven Neumann 2005-08-08 04:17:41 +00:00 committed by Sven Neumann
parent eb6268e53b
commit 3f9144e534
2 changed files with 6 additions and 40 deletions
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1
ChangeLog
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@ -1,6 +1,7 @@
2005-08-08 Sven Neumann <sven@gimp.org>
* app/base/siox.c (find_max_blob): fixed for offsetted regions.
Do thresholding as part of find_max_blob().
2005-08-08 Michael Natterer <mitch@gimp.org>

45
app/base/siox.c
View file

@ -522,37 +522,6 @@ create_signature (lab *input,
return rval;
}
static void
threshold_mask (TileManager *mask,
gint x,
gint y,
gint width,
gint height)
{
PixelRegion region;
gpointer pr;
gint row, col;
pixel_region_init (&region, mask, x, y, width, height, TRUE);
for (pr = pixel_regions_register (1, &region);
pr != NULL;
pr = pixel_regions_process (pr))
{
guchar *data = region.data;
for (row = 0; row < region.h; row++)
{
guchar *d = data;
for (col = 0; col < region.w; col++, d++)
*d = (*d & 0x80) ? 255 : 0;
data += region.rowstride;
}
}
}
static void
smooth_mask (TileManager *mask,
gint x,
@ -609,8 +578,8 @@ find_max_blob (TileManager *mask,
gpointer pr;
gint row, col;
gint curlabel = 1;
gint maxblob = 1;
gint maxregion = 0;
gint maxblob = 0;
pixel_region_init (&region, mask, x, y, width, height, FALSE);
@ -705,8 +674,7 @@ find_max_blob (TileManager *mask,
for (col = 0; col < region.w; col++, d++, i++)
{
if (labelfield[i] != 0 && labelfield[i] != maxblob)
*d = 0;
*d = (labelfield[i] == maxblob) ? 255 : 0;
}
data += region.rowstride;
@ -959,10 +927,10 @@ siox_foreground_extract (TileManager *pixels,
siox_progress_update (progress_callback, progress_data, 0.9);
/* Smooth a bit for error killing */
/* smooth a bit for error killing */
smooth_mask (mask, x, y, width, height);
/* Now erode, to make sure only "strongly connected components"
/* erode, to make sure only "strongly connected components"
* keep being connected
*/
erode_mask (mask, x, y, width, height);
@ -974,13 +942,10 @@ siox_foreground_extract (TileManager *pixels,
for (i = 0; i < smoothness; i++)
smooth_mask (mask, x, y, width, height);
/* Threshold the values */
threshold_mask (mask, x, y, width, height);
/* search the biggest connected component again to kill jitter */
find_max_blob (mask, x, y, width, height);
/* Now dilate, to fill up boundary pixels killed by erode */
/* dilate, to fill up boundary pixels killed by erode */
dilate_mask (mask, x, y, width, height);
siox_progress_update (progress_callback, progress_data, 1.0);