Since the concept of an "artifact" is mostly based on relative human perception, I'm wondering whether or not different people perceive artifacts differently, especially those who are visually impaired. If humans have slightly varying 'refresh rates' in which we perceive light, then there wouldn't be any 'true' solution to anti-aliasing to some sampling artifacts; for example, the wagon wheel effect.
Staffimjal
@thomaspwang Interesting thought! If we consider aliasing in the spatial domain, vision scientists have performed psychophysical tests that find that humans can detect up to 60 cpd. However, our sensitivity to detecting this sinusoid if we adjust the difference in luminance between the dark and the light parts of the sinusoid changes based on the spatial frequency, which is summarized in the contrast sensitivity function (CSF)(read more here if interested: https://www.ncbi.nlm.nih.gov/books/NBK219042/).
In the time domain, there's an equivalent concept called the flicker fusion threshold, which is the point at which a flickering light appears steady.
Now for your question, which is do these measurements differ between individuals? Upon a quick search, there does appear to be individual differences, predicted based on age at least for the CSF.
Since the concept of an "artifact" is mostly based on relative human perception, I'm wondering whether or not different people perceive artifacts differently, especially those who are visually impaired. If humans have slightly varying 'refresh rates' in which we perceive light, then there wouldn't be any 'true' solution to anti-aliasing to some sampling artifacts; for example, the wagon wheel effect.
@thomaspwang Interesting thought! If we consider aliasing in the spatial domain, vision scientists have performed psychophysical tests that find that humans can detect up to 60 cpd. However, our sensitivity to detecting this sinusoid if we adjust the difference in luminance between the dark and the light parts of the sinusoid changes based on the spatial frequency, which is summarized in the contrast sensitivity function (CSF)(read more here if interested: https://www.ncbi.nlm.nih.gov/books/NBK219042/).
In the time domain, there's an equivalent concept called the flicker fusion threshold, which is the point at which a flickering light appears steady.
Now for your question, which is do these measurements differ between individuals? Upon a quick search, there does appear to be individual differences, predicted based on age at least for the CSF.