Hauke Strasdat
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# 263 Actions

 Apr 21 awarded Necromancer Mar 4 revised Standard Notation for diagonal matrices typo Mar 4 revised Standard Notation for diagonal matrices add missing link Feb 17 answered Standard Notation for diagonal matrices Feb 10 revised Finding the relative pose of a robot gripper better wording Feb 10 answered Finding the relative pose of a robot gripper Feb 10 comment Numerical Algorithm for $n \times n$ Matrix Inverse What are the properties of the matrices you are dealing with? Is it guaranteed to be invertible or are you looking for some kind of least-squares fit/pseudo-inverse? Is the matrix maybe positive definite? Do you really need the inverse or is the solution of a linear system $A x = b$ sufficient? This is a good overview of various approaches: eigen.tuxfamily.org/dox/… Sep 24 comment What are advantages of quaternion over $3\times3$ rotator matrix for representing arbitrary rotation? The formula for Rs is not showing. Could you post it again? Sep 23 awarded Popular Question Sep 11 awarded Yearling Aug 15 answered What are advantages of quaternion over $3\times3$ rotator matrix for representing arbitrary rotation? May 23 asked How is the second part of a dual number called? Mar 10 awarded Nice Answer Dec 10 awarded Caucus Oct 20 comment Estimating the missing points of a 3D point cloud I fear there is not enough information to provide an answer. How was point cloud generated in the first place? Uniformly sampled from a perfect 3d model? Or noisy measurements from a 3d sensor? Even if you don't have prior know of the original shape, you might have some knowledge of the smoothness or topology of the surface? Sep 11 awarded Yearling Jul 2 awarded Curious Jun 7 answered Any name for a special matrix with only non-zero entry May 29 comment Jacobian of exponential mapping in SO3/SE3 I think you are right, and the equation $\partial \frac{e_i(\omega)}{\partial \omega_k} = \exp(\omega)\cdot G_k$ is wrong. But why do you think: $e_i(\omega)=\exp(\omega)$ The comment you mentioned states $\partial \frac{\exp(\omega)}{\partial \omega_k} = \exp(\omega)\cdot G_k$, but not $\partial \frac{\exp(a_i\log(\exp(\omega)T))P_i-P_i^*}{\partial \omega_k} = \exp(\omega)\cdot G_k$. Apr 11 awarded Revival