1. Is the trans_mat from ARToolKit have C*Tcm? (on Kato's presentation). art02-tutorial.pdf
2. How can I get the absolute camera coordinate from trans_mat? (marker is fixed and camera is moving, origin is center of marker)

1. http://www.hitlabnz.org/forum/showthread.php?t=159
2. http://www.hitlabnz.org/forum/showthread.php?t=56
3. http://www.hitlabnz.org/forum/showthread.php?t=131
4. http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm
5. http://www.hitl.washington.edu/artoolkit/mail-archive/message-thread-00838-Any-utility-function-to-.html
6. http://ecl.incheon.ac.kr/courses/ar7/index.html
7. Matrix and Quaternion FAQs

Title : How can I get the absoulte position of the camera with respect to fixed marker?

1. http://www.hitlabnz.org/forum/showthread.php?t=754

Title : Structure of returned value from arGetTransMat()

1. http://www.hitlabnz.org/forum/showthread.php?t=755

Title : Pose estimation algorithm?

1. http://www.hitlabnz.org/forum/showthread.php?p=1900#post1900

Google Search Keyword [direct linear transform] Very detailed document

1. http://www.kwon3d.com/theory/dlt/dlt.html

ARToolKit's Coordinate System

1. http://www.hitl.washington.edu/artoolkit/documentation/cs.htm

Camera and marker's relation ship. This will be the start point of 3d locailization system.

1. http://www.hitl.washington.edu/artoolkit/documentation/tutorialcamera.htm