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]
Antialiasing, part 1
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]
Tech hall of shame: Amazon Kindle
This one’s a Brooks Jensen nominee. Brooks gives the reason why the Kindle deserves a place in the THoS: for not including ePub as one of their acceptable formats thereby eliminating 99% of library eBooks from being read on the Kindle. Is Amazon so singularly focused on selling eBooks that they can’t allow us to… [Read More]
Tech hall of shame: Blu-Ray
The picture quality is great, but the new format has come with a cornucopia of downsides. Here are a few: Got off to a bad start with the format war with Toshiba. Customers hate format wars as much as manufacturers. Nobody wants to be stuck with a Betamax. Uncertainty means that wallets stay in customers’… [Read More]
Technology hall of shame
Technology hall of shame Photography is a technical art, and the technology of photography has undergone immense change throughout its nearly 200 year history. The pace has never been more rapid than at present. As anybody who’s been paying the slightest bit of attention for the last 10 to 20 years knows, the tsunami of… [Read More]
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