
This means that the continuous image is truly available to us if we implement
digital interpolation using a decent approximation to the sinc function.
3.3.2 Aliasing
Aliasing is the phenomenon that occurs when an image is sampled too coarsely,
that is, when the pixels are too far apart in relation to the size of the detail
present in the image [1, 5, 6, 9]. It introduces a very troublesome type of low-
frequency noise. Aliasing can be a significant source of error when images
contain a strong high-frequency pattern, but it can be, and should be, avoided
by proper system design.
If the sample spacing, Dx, is too large (i.e., Dx > 1=2f ), then a sinusoid ...