Red created this great full detailed explaination about what temporal aliasing is and what camera technology overcomes problems inherent in the digital medium.
Many modern technologies record and reproduce signals from the real-world. Microphones encode sound waves in conjunction with audio equipment, digital photography quantifies light using arrays of pixels, and cinema cameras record spans of time using discrete frames. In all cases, a central goal is to maximize fidelity within the constraints of a recording medium. However, whenever those real-world signals are sampled less frequently than they vary naturally, unrealistic "aliasing" artifacts are likely to appear. Aliasing is pervasive with all types of technology, and can arise as unnatural motion with cinema or as audible distortions with sound, among other complications. In the diagram below, a false wave is measured when samples are taken too infrequently: With digital camera sensors, most of the development has been aimed at reducing aliasing in the form ofpixelated edges and moiré patterns. This aliasing happens when the sensor gets tricked into recording false detail from otherwise unresolvable fine textures. It's especially detrimental with video, because it consumes bandwidth that would otherwise encode actual image detail. RED | Read the Full Article
Many modern technologies record and reproduce signals from the real-world. Microphones encode sound waves in conjunction with audio equipment, digital photography quantifies light using arrays of pixels, and cinema cameras record spans of time using discrete frames. In all cases, a central goal is to maximize fidelity within the constraints of a recording medium.
However, whenever those real-world signals are sampled less frequently than they vary naturally, unrealistic "aliasing" artifacts are likely to appear. Aliasing is pervasive with all types of technology, and can arise as unnatural motion with cinema or as audible distortions with sound, among other complications. In the diagram below, a false wave is measured when samples are taken too infrequently:
With digital camera sensors, most of the development has been aimed at reducing aliasing in the form ofpixelated edges and moiré patterns. This aliasing happens when the sensor gets tricked into recording false detail from otherwise unresolvable fine textures. It's especially detrimental with video, because it consumes bandwidth that would otherwise encode actual image detail.
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