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Because i have not got any answer better than his answer yet.feel free to give a better answer if you have. Given an image containing a mirror symmetrical object, such as a car or a butterfly, I want to find the symmetry axis: Due to perspective distortions the two halves of a symmetrical object will never match exactly.
Luckily, for the implementation of the next steps I am following a paper (page 4-5-6): link text that describes mathematically the technique to determine the dominant symmetry axis and I decided to write to you to ask if it's the right way or if perhaps there is a simpler solution to my problem. Thank you for your helps!
finding axis of symmetry in an image. How does rotation in OpenCV work. Rotation invariant object detection. Image matching. Rotation from getPerspectiveTransform. Android camera image rotation. Rotating Android Camera to Portrait. What is the best solution for rotation invariant detector? Transform a point with rotationMatrix2d [closed]
Hi, My ArUco marker is facing the camera, through 'drawaxis' it is clearly seen that the z axis is not stable and keeps flipping a lot through the time and minor movements. Output of eulers anlgles show one or two axis flip of 180 but that probably is a gimbal lock. would appreciate a detailed solution as I am new to coding. Thanks
finding axis of symmetry in an image. getAffineTransform, getPerspectiveTransform or findHomography?
For solve this problem in the first use findHomography() then compute rotation value in the last use perspectiveTransform() to transform object points to scene points.
Hi, I have some doubt about FindHomography algorithm. I wrote a program to test it. In this program I have rotated an image look for descriptors in original image and rotated image.
finding axis of symmetry in an image. How to get good matches from the ORB feature detection algorithm? How to decrease the number of processed frames from a live video camera? Unresolved inclusion in OpenCV+Android tutorial. build problems for android_binary_package - Eclipse Indigo, Ubuntu 12.04
cv2.solvePnp axis flip with rotation. SolvePnP detection errors [ios] SolvePnP fluctuating results. How can solvePnPRansac be used with double values? What format does cv2.solvePnP use for points in Python? Why does camera calibration work on one image but not on a (very similar) other image? OpenCV2.4.2 crash when calling solvePnP()
I am new to the OpenCV, C++, and general to coding. I somehow managed to get Euler's angles from rvec (with some major help). But I have a 180 degree flip in x (sometimes also z) axis. Also is it possible to get quaternion rotation from rvec or rotation matrix? would appreciate a detailed answer as I am very new to this.