有谁可以介绍一下下， 什么是projection matrix （投影矩阵），以及它的性质？ 关注者 70 被浏览

Nov 24, 2023 · Yes, because any projection matrix $A$, i.e., with $A^2=A$ is conjugated to a block matrix with identity matrix of size $r$ and a zero block. Hence $trace (A)=r=rank (A)$.

Dec 17, 2017 · represent the projection matrix in the plane with respect to the canonical basis. Suppose now we want find the projection matrix from the base $\mathcal {B}$ to the canonical …

I am looking for an intuitive reason for a projection matrix of an orthogonal projection to be symmetric. The algebraic proof is straightforward yet somewhat unsatisfactory. Take for …

linear-algebra matrices projection projection-matrices idempotents See similar questions with these tags.

If you can figure out which matrix that is, it's obvious that its inverse is again a projection matrix.

Thanks. What is the intuition behind that i.e. how do you derive that formulation for the projection matrix?

Jan 18, 2017 · From the matrix, it seems to generate the actual occlusion culling itself scaled proportionally to the projection matrix, at least when it comes to the near clipping plane. This …

Then use the fact that the projection you’re looking for is related in a simple way to the projection onto that space. The result is the same, but in this case the calculation is somewhat simpler …

Dec 4, 2018 · How to find Projection matrix onto the subspace Ask Question Asked 7 years, 8 months ago Modified 2 years, 5 months ago