Object tracking using Homography - OpenCV 3.4 with python 3 Tutorial 34

We’re going to learn in this tutorial how to track an object using the Feature matching method, and then finding the Homography.

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[aldomz]

I love your tutorials. I'm taking a computer vision course and doing a project related to traffic sign detection and identification and your videos have been a great help. Keep it up!

[chiarafarnesi]

Grazie infinitamente per i tutorial sui SIFT SURF e ORB. Sono stati di grande aiuto per avere una conoscienta base . Spiegazione semplice ma incisiva

[genp]

Hi there, the code snippets you show are great, they are really really useful, thank you for that. Don't hesitate in the future to explain a little bit more what the main lines do, the videos are already long so a few extra minutes don't matter

[sanchaykasturey]

Very easy to understand and good video can you please tell me if there is a way by which we can see what is its accuracy

[JulioCesarPereira]

Very nice video. It helped me a lot. Thanks.

[danichigokun]

SO MUCH THANK YOU!!!! this is what i was looking for, thanks so much :D

[juda]

GOTCHA! L'avevo capito che sei italiano
Complimenti per i video.

[ayoubmanssouri]

How can I develop the code that you wrote to stabilize an image in real time when my object vibrates or moves?

[mohamedihmeida]

Thank you for the video. Could you count the outlier matching points after you applied RANSAC?

[Sebasdlh]

I did sort of the same thing but with the ORB algorithm with a book and also using my webcam, and it draw a rectangle that moved waay to fast and was all over the place changing with the matches.... Do you know any way to fix this?

[eliavuzana]

realy appriciate you... your video is very helpful! thx:)

[sallyhuang]

thank you very much for your tutorial and it is really helpful. I want to ask whether we can derive the homography between the book and the camera? i mean can we obtain the 3d position of the book?

[thorbenpanusch]

For what did you caculate/deduct the variable matches_mask? As far as I can see, it's not being used.
Best regards

[dannydeadlifts]

Hey man I don't know if you're aware of this, I was trying to code alongside you and right after the cv2.xfeatures2d.SIFT_create() function call the program will throw an error. The error log says "This algorithm is patented and is excluded in this configuration;" and suggests a rebuild of opencv with the flag OPENCV_ENABLE_NONFREE enabled (default is disabled). Just a heads up for anyone watching who's got OpenCV version >3.4.3. I don't know if it's legal to use a recompile as I'm checking this issue out as well. There's been several posts on the OpenCV git and StackOverflow explaining this. Would love to link them but I'm scared if youtube will filter it out as spam lol.

[PrasannaRoutray]

How good is this method for dynamic object tracking? What is the FPS? is it possible to track small logo?

[승김-lm]

Hello. I am using the video above.I want to track the object I want. The difference is that there are same objects on the screen, and I want to track them at the same time.
I wonder if you have any good ideas.
Please help me.

[ze_dron]

got OpenCV(3.4.1) error: (-215) scn + 1 == m.cols in function cv::perspectiveTransform
with dist line (26 minute)
has someone face with such a problem?

[igorandrusyk]

Hello. How I can get object id for multiple detection? Any idea?

[javlontursunov]

Sir please make another video about how to fix xfeatures problem

[SimonKlimekNetwork]

Great Video!

AT the very end of video I receive this:
OpenCV(3.4.1) Error: Assertion failed (scn + 1 == m.cols) in perspectiveTransform
Can anyone faced this issue? (Also I changed SIFT to SURF due to errors)
Cheers