Camera Technician Question:

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Tell me what is aliasing?

Camera Technician Interview Question
Camera Technician Interview Question

Answer:

The process by which smooth curves and lines that run diagonally across the screen of a low-resolution digital file take on a jagged look as opposed to a smooth, natural rendition. Aliasing is an artifact that results from a sample resolution that is not more than twice the frequency of what is being captured, or the Nyquist Rate. A common form of aliasing is moiré. Smoothing and anti-aliasing techniques can reduce the effects of aliasing.

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