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fix false positive detection

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This commit is contained in:
APrigarina 2021-03-04 14:04:50 +03:00
parent 0f7b2eb79f
commit 125cc79c17
1 changed files with 30 additions and 8 deletions
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38
modules/objdetect/src/qrcode.cpp
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@ -235,9 +235,11 @@ vector<Vec3d> QRDetect::searchHorizontalLines()
vector<Point2f> QRDetect::separateVerticalLines(const vector<Vec3d> &list_lines)
{
CV_TRACE_FUNCTION();
for (int coeff_epsilon = 1; coeff_epsilon < 10; coeff_epsilon++)
const double min_dist_between_points = 10.0;
const double max_ratio = 1.0;
for (int coeff_epsilon_i = 1; coeff_epsilon_i < 101; ++coeff_epsilon_i)
{
const float coeff_epsilon = coeff_epsilon_i * 0.1f;
vector<Point2f> point2f_result = extractVerticalLines(list_lines, eps_horizontal * coeff_epsilon);
if (!point2f_result.empty())
{
@ -247,9 +249,23 @@ vector<Point2f> QRDetect::separateVerticalLines(const vector<Vec3d> &list_lines)
point2f_result, 3, labels,
TermCriteria(TermCriteria::EPS + TermCriteria::COUNT, 10, 0.1),
3, KMEANS_PP_CENTERS, centers);
if (compactness == 0)
double min_dist = std::numeric_limits<double>::max();
for (size_t i = 0; i < centers.size(); i++)
{
double dist = norm(centers[i] - centers[(i+1) % centers.size()]);
if (dist < min_dist)
{
min_dist = dist;
}
}
if (min_dist < min_dist_between_points)
{
continue;
if (compactness > 0)
}
double mean_compactness = compactness / point2f_result.size();
double ratio = mean_compactness / min_dist;
if (ratio < max_ratio)
{
return point2f_result;
}
@ -456,7 +472,6 @@ bool QRDetect::localization()
vector<Point2f> list_lines_y = separateVerticalLines(list_lines_x);
if( list_lines_y.empty() ) { return false; }
vector<Point2f> centers;
Mat labels;
kmeans(list_lines_y, 3, labels,
TermCriteria( TermCriteria::EPS + TermCriteria::COUNT, 10, 0.1),
@ -464,7 +479,7 @@ bool QRDetect::localization()
fixationPoints(localization_points);
bool suare_flag = false, local_points_flag = false;
bool square_flag = false, local_points_flag = false;
double triangle_sides[3];
double triangle_perim, square_area, img_square_area;
if (localization_points.size() == 3)
@ -482,14 +497,14 @@ bool QRDetect::localization()
if (square_area > (img_square_area * 0.2))
{
suare_flag = true;
square_flag = true;
}
}
else
{
local_points_flag = true;
}
if ((suare_flag || local_points_flag) && purpose == SHRINKING)
if ((square_flag || local_points_flag) && purpose == SHRINKING)
{
localization_points.clear();
bin_barcode = resized_bin_barcode.clone();
@ -1970,6 +1985,13 @@ bool QRDecode::createSpline(vector<vector<Point2f> > &spline_lines)
}
}
}
for (int i = 0; i < NUM_SIDES; i++)
{
if (spline_lines[i].size() == 0)
{
return false;
}
}
return true;
}