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c++ Programming Glossary: homographyOpenCV : libopencv_core.so.2.4: cannot open shared object file: No such file or directory http://stackoverflow.com/questions/19164343/opencv-libopencv-core-so-2-4-cannot-open-shared-object-file-no-such-file-or bird's eye view using them First we need to calculate the homography matrix #include opencv2 highgui highgui.hpp #include opencv2.. H3 cout scale matrix endl scale_matrix endl endl generate homography matrix Mat homography_matrix transformation_matrix topview_matrix.. endl scale_matrix endl endl generate homography matrix Mat homography_matrix transformation_matrix topview_matrix scale_matrix cout..
Video Stabilization with OpenCV http://stackoverflow.com/questions/3431434/video-stabilization-with-opencv Feed those pairs into cvFindHomography to compute the homography between those frames. Warp frames according to combined.. homographies.. I should better mention explicitly just in case The homography based approach is likely very exact so stationary object will..
http://stackoverflow.com/questions/6087241/opencv-warpperspective improve this question The problem occurs because the homography maps part of the image to negative x y values which are outside.. . If A and B are homographies then AB represents the homography which applies B first and then A. Because of this all we need.. this all we need to do to offset the output is create the homography matrix for a translation by some offset and then pre multiply..
Calculate offset/skew/rotation of similar images in C++ http://stackoverflow.com/questions/6542339/calculate-offset-skew-rotation-of-similar-images-in-c pairs of 2D points. Those pairs will be used to calculate homography Mat src2Dfeatures Mat dst2Dfeatures Mat sPoints .copyTo src2Dfeatures.. src2Dfeatures Mat dPoints .copyTo dst2Dfeatures Calculate homography vector uchar outlierMask Mat H H findHomography src2Dfeatures.. to dst right outimg cvWaitKey 0 Now you have the resulting homography. I mean that H srcImage is alligned to dstImage. Apply H using..
get 3d coord from 2d image pixel if we know extrinsic and intrinsic parameters http://stackoverflow.com/questions/7836134/get-3d-coord-from-2d-image-pixel-if-we-know-extrinsic-and-intrinsic-parameters extrinsics also called CameraPose . Pose is a 3x4 matrix homography is a 3x3 matrix. How to get homography from pose Column 1 of.. is a 3x4 matrix homography is a 3x3 matrix. How to get homography from pose Column 1 of Homography is column r11 r21 r31 of Pose... of the 2 first columns of pose. Now that you have homography project the points. Your 2d points are x y. Add them a z 1 so..
http://stackoverflow.com/questions/8205835/stitching-2-images-in-opencv start for panography. I ve already found keypoints found homography using RANSAC but I can't figure out how to align these 2 images.. the warped image cut up and I know I have to change the homography matrix but for now I need to align these two images. Thank you..
http://stackoverflow.com/questions/9860667/writing-robust-color-and-size-invariant-circle-detection-with-opencv-based-on between these two sets of positions is described by a 2D homography. And the homography can be estimated using only four points... sets of positions is described by a 2D homography. And the homography can be estimated using only four points. Then you could improve..
Algorithm improvement for Coca-Cola can shape recognition http://stackoverflow.com/questions/10168686/algorithm-improvement-for-coca-cola-can-shape-recognition can find a nice code example using features in Features2D Homography to find a known object Both algorithms are invariant to scaling..
get 3d coord from 2d image pixel if we know extrinsic and intrinsic parameters http://stackoverflow.com/questions/7836134/get-3d-coord-from-2d-image-pixel-if-we-know-extrinsic-and-intrinsic-parameters then you got everything. That means that you can have Homography from the extrinsics also called CameraPose . Pose is a 3x4 matrix.. a 3x3 matrix. How to get homography from pose Column 1 of Homography is column r11 r21 r31 of Pose. Column 2 of Homography is column.. 1 of Homography is column r11 r21 r31 of Pose. Column 2 of Homography is column r12 r22 r32 of Pose. Column 3 of Homography is column..
http://stackoverflow.com/questions/8205835/stitching-2-images-in-opencv keypoints2 good_matches i .trainIdx .pt Find Homography Mat H findHomography Mat points2 Mat points1 CV_RANSAC warp.. good_matches i .trainIdx .pt Find Homography Mat H findHomography Mat points2 Mat points1 CV_RANSAC warp the image warpPerspective..
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