Questions tagged [photometric]
The photometric tag has no usage guidance.
9 questions
2
votes
1
answer
272
views
How is Aperture and Pixel Size accounted for in calculating received power using ray tracing?
NOTE: Deleting the question to rephrase it after continuing to read other responses and toy around with it:
I've written a path tracer and am now working on implementing a physically accurate way of ...
CommunityBot
- 1
1
vote
0
answers
40
views
How to solve GGX roughness from existing maps
I have a problem that I cannot really wrap my head around.
I have a minimal light stage setup to scan heads:
I have cross polarized cameras and parallel polarized cameras.
I have parallel polarized ...
- 2,232
3
votes
0
answers
53
views
Diffuse irradiance map : confusion about photometric vs radiometric units
I have spent the longest amount of time just taking the terminology for granted & have only just recently started studying or at least trying to understand the difference between radiometric and ...
- 31
0
votes
1
answer
856
views
What is this vertical line contour effect in glitch art called?
Some underlying portrait above is glazed over with a series of vertical lines that neatly follow the contours of the face. What is this effect called and how can it be replicated, step-by-step, in ...
- 410
5
votes
0
answers
221
views
How to use Photometric Units with Rendering Equation?
So I was just reading up on how to create more Physically Based Lights and wandered into the realm of photometry. I read the paper "Moving FrostBite to PBR" and in it the author claims he decided to ...
- 2,518
2
votes
0
answers
603
views
Calculating intensities of Virtual Point Lights in Instant Radiosity from IES lights
Short introduction
I created a function that interpolates the IES luminious intensities (candelas) using Hermite interpolation, so in my code all light sources have $I(\theta, \phi)$ function - but ...
1
vote
0
answers
54
views
How do you sample an analogue image and store it in a true-colour frame buffer? [closed]
I really cannot get my head around on this issue - how does an analogue image is sampled and then stored in a ture-colour frame buffer (e.g. in a camera) and how do you prevent noise when you do so? ...
- 11
7
votes
1
answer
2k
views
What is stereo about multi-view stereo?
What 3D scene reconstruction methods does the term "multi-view stereo" encompass? Is it only used for methods that apply binocular stereo algorithms (taking 2 views as input) in a pairwise manner? Or ...
CommunityBot
- 1
12
votes
1
answer
842
views
Rendering in radiometric units or photometric?
In traditional rendering, it is typical to do all the calculations with radiometric units, either as full spectral rendering, or component-wise (XYZ, RGB, etc).
However, as modern rendering adds more ...
CommunityBot
- 1