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Add special case for the 0,0 vector to hexagon search.

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This commit is contained in:
Ari Koivula 2013-10-08 16:11:00 +03:00
parent 8910037936
commit cdcb56dd4a
1 changed files with 25 additions and 0 deletions
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25
src/search.c
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@ -139,6 +139,31 @@ void hexagon_search(picture *pic, picture *ref,
best_index = i;
}
}
// Try the 0,0 vector.
if (!(x == 0 && y == 0)) {
unsigned cost = get_block_sad(pic, ref, orig_x, orig_y,
orig_x, orig_y,
block_width, block_width);
if (cost > 0 && cost < best_cost) {
best_cost = cost;
best_index = 0;
x = 0;
y = 0;
// Redo the search around the 0,0 point.
for (i = 1; i < 7; ++i) {
const vector2d *pattern = large_hexbs + i;
unsigned cost = get_block_sad(pic, ref, orig_x, orig_y,
orig_x + pattern->x, orig_y + pattern->y,
block_width, block_width);
if (cost > 0 && cost < best_cost) {
best_cost = cost;
best_index = i;
}
}
}
}
// Iteratively search the 3 new points around the best match, until the best
// match is in the center.