[darktable-devel] What does darktable noiseprofiling read_pfm parameters mean?

I'm trying to analysis darktable. I'm windows user. I found the usage of darktable like as following on noiseprofile.c.  usage : input.pfm [-c a1 b1] Here, I want to know the c and a1 and b1. Q1.What is this? Q2.What do those mean? Q3.How can we get information and parameters above parameters? Q

[darktable-devel] What do c , a1 and b1 mean on noiseprofile.c?

I'm trying to analysis darktable. I'm windows user. I found the usage of darktable like as following on noiseprofile.c.  usage : input.pfm [-c a1 b1] Here, I want to know the c and a1 and b1. Q1.What is this? Q2.What do those mean? Q3.How can we get information and parameters above parameters? Q