commit
dd7d1ab9dd
1 changed files with 11 additions and 7 deletions
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@ -648,9 +648,11 @@ static void find_leftmost_to_line(void *user_data, int y, int left, int right)
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}
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}
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static double distance(struct quirc_point a, struct quirc_point b)
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static double length(struct quirc_point a, struct quirc_point b)
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{
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return sqrt((a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y));
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double x = abs(a.x - b.x) + 1;
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double y = abs(a.y - b.y) + 1;
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return sqrt(x * x + y * y);
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}
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/* Estimate grid size by determing distance between capstones
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*/
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@ -662,17 +664,19 @@ static void measure_grid_size(struct quirc *q, int index)
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struct quirc_capstone *b = &(q->capstones[qr->caps[1]]);
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struct quirc_capstone *c = &(q->capstones[qr->caps[2]]);
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double ab = distance(b->corners[0], a->corners[3]);
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double capstone_ab_size = (distance(b->corners[0], b->corners[3]) + distance(a->corners[0], a->corners[3]))/2.0;
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double ab = length(b->corners[0], a->corners[3]);
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double capstone_ab_size = (length(b->corners[0], b->corners[3]) + length(a->corners[0], a->corners[3]))/2.0;
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double ver_grid = 7.0 * ab / capstone_ab_size;
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double bc = distance(b->corners[0], c->corners[1]);
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double capstone_bc_size = (distance(b->corners[0], b->corners[1]) + distance(c->corners[0], c->corners[1]))/2.0;
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double bc = length(b->corners[0], c->corners[1]);
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double capstone_bc_size = (length(b->corners[0], b->corners[1]) + length(c->corners[0], c->corners[1]))/2.0;
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double hor_grid = 7.0 * bc / capstone_bc_size;
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double grid_size_estimate = (ver_grid + hor_grid) / 2;
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qr->grid_size = 4*((int)(grid_size_estimate - 17.0 + 2.0) / 4) + 17;
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int ver = (int)((grid_size_estimate - 17.0 + 2.0) / 4.0);
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qr->grid_size = 4*ver + 17;
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}
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/* Read a cell from a grid using the currently set perspective
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