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Added fix for removing too similar images into the stitching module

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This commit is contained in:
Alexey Spizhevoy
2011-09-30 12:46:11 +00:00
parent 3d3efe7c07
commit c5357cc17c
2 changed files with 11 additions and 10 deletions
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14
modules/stitching/src/matchers.cpp
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@@ -427,12 +427,6 @@ void BestOf2NearestMatcher::match(const ImageFeatures &features1, const ImageFea
{ {
(*impl_)(features1, features2, matches_info); (*impl_)(features1, features2, matches_info);
//Mat out;
//drawMatches(features1.img, features1.keypoints, features2.img, features2.keypoints, matches_info.matches, out);
//stringstream ss;
//ss << features1.img_idx << features2.img_idx << ".png";
//imwrite(ss.str(), out);
// Check if it makes sense to find homography // Check if it makes sense to find homography
if (matches_info.matches.size() < static_cast<size_t>(num_matches_thresh1_)) if (matches_info.matches.size() < static_cast<size_t>(num_matches_thresh1_))
return; return;
@@ -466,7 +460,13 @@ void BestOf2NearestMatcher::match(const ImageFeatures &features1, const ImageFea
if (matches_info.inliers_mask[i]) if (matches_info.inliers_mask[i])
matches_info.num_inliers++; matches_info.num_inliers++;
matches_info.confidence = matches_info.num_inliers / (8 + 0.3*matches_info.matches.size()); // These coeffs are from paper M. Brown and D. Lowe. "Automatic Panoramic Image Stitching
// using Invariant Features"
matches_info.confidence = matches_info.num_inliers / (8 + 0.3 * matches_info.matches.size());
// Set zero confidence to remove matches between too close images, as they don't provide
// additional information anyway. The threshold was set experimentally.
matches_info.confidence = matches_info.confidence > 3. ? 0. : matches_info.confidence;
// Check if we should try to refine motion // Check if we should try to refine motion
if (matches_info.num_inliers < num_matches_thresh2_) if (matches_info.num_inliers < num_matches_thresh2_)

7
modules/stitching/src/motion_estimators.cpp
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@@ -748,11 +748,12 @@ vector<int> leaveBiggestComponent(vector<ImageFeatures> &features, vector<Match
if (static_cast<int>(features_subset.size()) == num_images) if (static_cast<int>(features_subset.size()) == num_images)
return indices; return indices;
LOG("Removed some images, because can't match them: ("); LOG("Removed some images, because can't match them or there are too similar images: (");
LOG(indices_removed[0]+1); LOG(indices_removed[0] + 1);
for (size_t i = 1; i < indices_removed.size(); ++i) for (size_t i = 1; i < indices_removed.size(); ++i)
LOG(", " << indices_removed[i]+1); LOG(", " << indices_removed[i]+1);
LOGLN("). Try to decrease --match_conf value."); LOGLN(").");
LOGLN("Try to decrease --match_conf value and/or check if you're stitching duplicates.");
features = features_subset; features = features_subset;
pairwise_matches = pairwise_matches_subset; pairwise_matches = pairwise_matches_subset;