Patent ID: 9665974
Date: 2017-05-30
CPC Classifications: G06T

Claim:
1. A computer-implemented method of sampling light paths connecting a light source subpath to a light receiver subpath, comprising: receiving an input configuration, the input configuration comprises a first endpoint, a first direction, a second endpoint, and a second direction; sampling a set of vertices to determine a set of subpath segments according to a sampling function defined as a product of a set of geometry terms and a set of phase functions; creating a subpath comprising the set of subpath segments to connect the light source subpath with the light receiver subpath; wherein the sampling function comprises a joint probability density function, and the step of sampling a set of vertices comprises factorizing the joint probability density function into a product of a set of conditional probability density functions; and each of the conditional probability density function corresponds to a distance sampling and a direction sampling.