From 64729b45a73cd17c85c57cd71dc277ae84a4b471 Mon Sep 17 00:00:00 2001 From: Willem Jan Palenstijn Date: Mon, 20 May 2019 13:27:56 +0200 Subject: Add note --- cuda/3d/cone_bp.cu | 3 +++ 1 file changed, 3 insertions(+) (limited to 'cuda/3d') diff --git a/cuda/3d/cone_bp.cu b/cuda/3d/cone_bp.cu index 6b2c8a1..7312bbc 100644 --- a/cuda/3d/cone_bp.cu +++ b/cuda/3d/cone_bp.cu @@ -253,6 +253,9 @@ bool transferConstants(const SConeProjection* angles, unsigned int iProjAngles, // FDK weighting factor // ( || u v s || / || u v (s-x) || ) ^ 2 + // Since u and v are ratios with the same denominator, we have + // a degree of freedom to scale the denominator. We use that to make + // the square of the denominator equal to the relevant weighting factor. for (unsigned int i = 0; i < iProjAngles; ++i) { -- cgit v1.2.3