Moire also happened with my HW0 draw something post! Moire occurs when the pattern's repetition occurs at a higher frequency than the sample frequency, so that's why the left image looks smooth and the right image looks wavy.
micahtyong
Same here! To prevent this type of aliasing in texture mapping, I wonder if Nyquist's theorem would come in handy here. This photoshop how-to blog explains that we could use anti-aliasing techniques and, preferrably a low-pass filter to eliminate the effect of Moire.
JefferyYC
On a side note, you might be noticing grey points at intersections of lines in the image. This is called the Hermann grid illusion and has to do with how cells in our visual system process contrast.
Moire also happened with my HW0 draw something post! Moire occurs when the pattern's repetition occurs at a higher frequency than the sample frequency, so that's why the left image looks smooth and the right image looks wavy.
Same here! To prevent this type of aliasing in texture mapping, I wonder if Nyquist's theorem would come in handy here. This photoshop how-to blog explains that we could use anti-aliasing techniques and, preferrably a low-pass filter to eliminate the effect of Moire.
On a side note, you might be noticing grey points at intersections of lines in the image. This is called the Hermann grid illusion and has to do with how cells in our visual system process contrast.