X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=images%2Fsig-txt.c;h=ab04143428848fa9c0eb97d5506828689e4cc7d9;hb=0e5c5828c3f3e1abd14bd012827e6b467075290b;hp=0429b7390162c31e9938b7fc829690600f33e180;hpb=a71db29f49ca53affdec9bb557d386fbd2c04328;p=libucw.git

diff --git a/images/sig-txt.c b/images/sig-txt.c
index 0429b739..ab041434 100644
--- a/images/sig-txt.c
+++ b/images/sig-txt.c
@@ -7,7 +7,7 @@
  *	of the GNU Lesser General Public License.
  */
 
-#define LOCAL_DEBUG
+#undef LOCAL_DEBUG
 
 #include "sherlock/sherlock.h"
 #include "images/images.h"
@@ -22,6 +22,12 @@
 void
 image_sig_detect_textured(struct image_sig_data *data)
 {
+  if (image_sig_textured_threshold <= 0)
+    {
+      DBG("Zero textured threshold.");
+      return;
+    }
+	
   uns cols = data->cols;
   uns rows = data->rows;
   uns cell_cols = MIN((cols + 1) / 2, MAX_CELLS_COLS);
@@ -31,6 +37,12 @@ image_sig_detect_textured(struct image_sig_data *data)
   uns i, j;
   u32 cnt[IMAGE_REG_MAX];
 
+  if (cell_cols * cell_rows < 4)
+    {
+      DBG("Image is not textured.");
+      return;
+    }
+
   DBG("Detecting textured image... cols=%u rows=%u cell_cols=%u cell_rows=%u", cols, rows, cell_cols, cell_rows);
   
   /* Compute cells boundaries */
@@ -75,7 +87,7 @@ image_sig_detect_textured(struct image_sig_data *data)
   DBG("Coefficient=%g", (double)e / (data->regions_count * data->blocks_count));
 
   /* Threshold */
-  if (e <= image_sig_textured_threshold * data->regions_count * data->blocks_count)
+  if (e < image_sig_textured_threshold * data->regions_count * data->blocks_count)
     {
       data->flags |= IMAGE_SIG_TEXTURED;
       DBG("Image is textured.");