Sunlit wet asphalt aside, most pictures I make with cameras lacking antialiasing filters look just fine with no special post processing. That doesn’t mean that there’s no aliasing going on; it just means that the artifacts thus produced look fairly realistic and aren’t objectionable. There are two eminently defensible but mutually exclusive perspectives on whether… [Read More]

In the previous post, I talked about sampling, aliasing, and antialiasing in the context of sampling a time-varying continuous signal. In this post, I’d like to carry out a similar discussion for the case of instantaneous two-dimensional continuous spatial signals, such as images produced by a lens, sampled by idealized and actual image capture chips…. [Read More]

The following question came up in a photography mailing list: “…could you explain the thinking behind the evils of the antialiasing filter on DSLR’s? Why are they needed and what are their advantages/disadvantages and why don’t 2 1/4 digital backs have them, or do they?” Since there seems to be general interest in this topic,… [Read More]