enkidu Posted September 6, 2016 Report Share Posted September 6, 2016 Quick math question: How does using multiple reflective spheres impact light position calculation accuracy? Is the use of two spheres advised only as a redundancy? Or does the HSH-Algorithm calculate a mean value of the respective light-positions? If so, wouldn't it be better to use 4 spheres (one in each corner of the image) to improve accuracy? All the best, Tom Link to comment Share on other sites More sharing options...
cdschroer Posted September 6, 2016 Report Share Posted September 6, 2016 Hi Tom, Right now the RTIBuilder only uses one sphere to calculate the light position. Please note that neither the HSHfitter nor the PTMfitter calculate the light positions, they need a light position (.lp) file in order to run. So, RTIBuilder calculates that for you based on the sphere. RTIBuilder can generate a highlight file for each sphere, but we haven't had a chance to implement calculating the light position from 2 spheres into the software. There is some research software that calculates the light position from multiple spheres, and it is more accurate than using a single sphere. So, we recommend using 2 spheres when possible, so that your data has the ability to take advantage of this in the future. Carla Link to comment Share on other sites More sharing options...
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