}
#endif
-gdouble image_sim_compare(ImageSimilarityData *a, ImageSimilarityData *b)
+gdouble image_sim_compare_transfo(ImageSimilarityData *a, ImageSimilarityData *b, gchar transfo)
{
gint sim;
- gint i;
+ gint i1, i2, *i;
+ gint j1, j2, *j;
if (!a || !b || !a->filled || !b->filled) return 0.0;
sim = 0.0;
- for (i = 0; i < 1024; i++)
+ if (transfo & 1) { i = &j2; j = &i2; } else { i = &i2; j = &j2; }
+ for (j1 = 0; j1 < 32; j1++)
{
- sim += abs(a->avg_r[i] - b->avg_r[i]);
- sim += abs(a->avg_g[i] - b->avg_g[i]);
- sim += abs(a->avg_b[i] - b->avg_b[i]);
+ if (transfo & 2) *j = 31-j1; else *j = j1;
+ for (i1 = 0; i1 < 32; i1++)
+ {
+ if (transfo & 4) *i = 31-i1; else *i = i1;
+ sim += abs(a->avg_r[i1*32+j1] - b->avg_r[i2*32+j2]);
+ sim += abs(a->avg_g[i1*32+j1] - b->avg_g[i2*32+j2]);
+ sim += abs(a->avg_b[i1*32+j1] - b->avg_b[i2*32+j2]);
+ }
}
return 1.0 - ((gdouble)sim / (255.0 * 1024.0 * 3.0));
}
-/* this uses a cutoff point so that it can abort early when it gets to
- * a point that can simply no longer make the cut-off point.
- */
-gdouble image_sim_compare_fast(ImageSimilarityData *a, ImageSimilarityData *b, gdouble min)
+gdouble image_sim_compare(ImageSimilarityData *a, ImageSimilarityData *b)
+{
+ gboolean test_transformations = TRUE; /* could be a function parameter */
+ gint max_t = (test_transformations ? 8 : 1);
+
+ gint t;
+ gdouble score, max_score = 0;
+
+ for(t = 0; t < max_t; t++)
+ {
+ score = image_sim_compare_transfo(a, b, t);
+ if (score > max_score) max_score = score;
+ }
+ return max_score;
+}
+
+
+/*
+4 rotations (0, 90, 180, 270) combined with two mirrors (0, H)
+generate all possible isometric transformations
+= 8 tests
+= change dir of x, change dir of y, exchange x and y = 2^3 = 8
+*/
+gdouble image_sim_compare_fast_transfo(ImageSimilarityData *a, ImageSimilarityData *b, gdouble min, gchar transfo)
{
gint sim;
- gint i;
- gint j;
+ gint i1, i2, *i;
+ gint j1, j2, *j;
#ifdef ALTERNATE_INCLUDE_COMPARE_CHANGE
if (alternate_enabled) return alternate_image_sim_compare_fast(a, b, min);
min = 1.0 - min;
sim = 0.0;
- for (j = 0; j < 1024; j += 32)
+ if (transfo & 1) { i = &j2; j = &i2; } else { i = &i2; j = &j2; }
+ for (j1 = 0; j1 < 32; j1++)
{
- for (i = j; i < j + 32; i++)
+ if (transfo & 2) *j = 31-j1; else *j = j1;
+ for (i1 = 0; i1 < 32; i1++)
{
- sim += abs(a->avg_r[i] - b->avg_r[i]);
- sim += abs(a->avg_g[i] - b->avg_g[i]);
- sim += abs(a->avg_b[i] - b->avg_b[i]);
+ if (transfo & 4) *i = 31-i1; else *i = i1;
+ sim += abs(a->avg_r[i1*32+j1] - b->avg_r[i2*32+j2]);
+ sim += abs(a->avg_g[i1*32+j1] - b->avg_g[i2*32+j2]);
+ sim += abs(a->avg_b[i1*32+j1] - b->avg_b[i2*32+j2]);
}
/* check for abort, if so return 0.0 */
if ((gdouble)sim / (255.0 * 1024.0 * 3.0) > min) return 0.0;
return (1.0 - ((gdouble)sim / (255.0 * 1024.0 * 3.0)) );
}
+
+/* this uses a cutoff point so that it can abort early when it gets to
+ * a point that can simply no longer make the cut-off point.
+ */
+gdouble image_sim_compare_fast(ImageSimilarityData *a, ImageSimilarityData *b, gdouble min)
+{
+ gboolean test_transformations = TRUE; /* could be a function parameter */
+ gint max_t = (test_transformations ? 8 : 1);
+
+ gint t;
+ gdouble score, max_score = 0;
+
+ for(t = 0; t < max_t; t++)
+ {
+ score = image_sim_compare_fast_transfo(a, b, min, t);
+ if (score > max_score) max_score = score;
+ }
+ return max_score;
+}
/* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */