openCV中的3D翘曲用于标记检测

Question

I am working on a code for marker detection.from my web cam i am taking input image of marker ,this marker inside it has one reference point .I have to detect that reference point.for that i need some warping method.i know how to do the 2-d warping via cvGetPerspectiveTransform() and cvWarpPerspective() in opencv.but i want to ask that is there any way by which i can generate some 3-d perspective transform matrix that can be used in 3-d warping.

 cvGetPerspectiveTransform(rectangles[rectIndex].OuterCorner, dstCorners,map_matrix);
 cvWarpPerspective(workGrayImg,projectedImg,map_matrix,CV_INTER_LINEAR |CV_WARP_FILL_OUTLIERS ,         
 cvScalarAll (0));

Answer 1

There is a small library called ArUco that does what You are trying to do,I guess. As it is open source You can just check how they did it.

As I understand You need to find the marker first, and then make it square, so You can read the info contained inside. You can also look for methods used for QRcodes.