Issues about BruteForceMatcher_GPU_base, knnMatch function. (Bug #1074)

Added by inkyu sa almost 14 years ago. Updated almost 13 years ago.

Status:Done Start date:
Priority:High Due date:
Assignee:Vladislav Vinogradov % Done:

0%
Category:gpu (cuda)
Target version:2.4.0
Affected version: Operating System:
Difficulty: HW Platform:
Pull request:

Description

Hello, all.

I am trying to match surf features using gpu knnMatch function.

Although it looks like working well, often all features are mismatched given consecutive frames.

Please have a look at the following test video.
http://www.youtube.com/watch?v=9gKrKRcXKVs

In addition this is part of my code.

==========================code start=========================
surf(img0, GpuMat(), keypoints0GPU, descriptors0GPU);
surf(img1, GpuMat(), keypoints1GPU, descriptors1GPU);
..
..
filteredMatches.clear();
vector<vector<DMatch> > matches12, matches21;
gpu_matcher.knnMatch(descriptors0GPU,descriptors1GPU,matches12,1,Mask,false); gpu_matcher.knnMatch(descriptors1GPU,descriptors0GPU,matches21,1,Mask,false);

..
..
drawMatches(g_pImg_A, keypointsr0, g_pImg_B, keypointsr1, filteredMatches, img_matches,MachedDrawColor,KeypointsDrawColor);
cv::imshow(MatchwindowName, img_matches);
==========================code end =============================

Is there any issue on Brute_force_matcher.cpp while matching real-time or matching between different number of descriptors?

Thank you in advance.

My opencv2.2 revision is 5099 and CUDA2.3 driver on Ubuntu10.04.

Associated revisions

Revision c4e59866
Added by Roman Donchenko over 11 years ago

Merge pull request #1074 from devernay:2.4-cap_qt-multithread

History

#1
Updated by inkyu sa almost 14 years ago

This issue occurs when matches12 and matches21 have the same number of matched features.
Now I am trying to find out whether drawing function has a bug or descriptors are corrupted when two matched vector have the same number of size.

#2
Updated by Alexander Shishkov about 13 years ago

  • Description changed from Hello, all. I am trying to match surf features using gpu knnMatch function. ... to Hello, all. I am trying to match surf features using gpu knnMatch function. ... More

#3
Updated by Vladislav Vinogradov about 13 years ago

There was a bug in SURF implementation. Also knnMatch implementaion was updated. Does the bug reproduced on last OpenCV version?

  • Status deleted (Open)
  • Assignee changed from inkyu sa to Vladislav Vinogradov

#4
Updated by Alexander Shishkov almost 13 years ago

  • Status set to Open

#5
Updated by Anatoly Baksheev almost 13 years ago

Vlad, should we close this?

#6
Updated by Vladislav Vinogradov almost 13 years ago

Probably it was a bug in SURF. It's been fixed.

  • Status changed from Open to Done
  • Target version set to 2.4.0

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