maxmoritz

06-07-2016, 08:00 AM

Hi erverybody

Unfortunately i have some problems with https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch14.html

In chapter 14.4.7 there are the figures 14-13 and 14-14. Figure 14-13 defines some parameters for a 6-gaussian-filter. Figure 14-14 shows the result.

My first question: „variance“ in figure 14-13 is defined in mm^2. Is this the area of a square, a circle or something different??

My second question: A texture consists of texels, a texel has a certain size. How large must a texel be, so that i can use the parameters in figure 14-13? If a texel is too large, a face is blurred too strong. If a texel is too small, a face is hardly blurred. So the face must have a certain size and a texel must have a certain size. But how can i calculate these sizes?

Unfortunately i have some problems with https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch14.html

In chapter 14.4.7 there are the figures 14-13 and 14-14. Figure 14-13 defines some parameters for a 6-gaussian-filter. Figure 14-14 shows the result.

My first question: „variance“ in figure 14-13 is defined in mm^2. Is this the area of a square, a circle or something different??

My second question: A texture consists of texels, a texel has a certain size. How large must a texel be, so that i can use the parameters in figure 14-13? If a texel is too large, a face is blurred too strong. If a texel is too small, a face is hardly blurred. So the face must have a certain size and a texel must have a certain size. But how can i calculate these sizes?