Exposing PseudoAstronomy

August 16, 2012

Podcast Episode 48: Image Processing and Anomalies, Part 2


Alrighty, episode 48 has been posted, and the companion video has been expectedly delayed.

This episode is almost as long as part 1, and I still left stuff out. Sharpening and filters and stuff like that is going to wait for a later episode. The topics discussed this time are: Dynamic range, noise, rotation and resizing, and levels, curves, and contrast.

The bottom-line with this episode is that even the most seemingly innocuous adjustments – like Auto Levels, or rotate by 10°, or increase the size by 50% – are going to change the information that was originally there, and often it will do it destructively such that you cannot make the reverse change and get the original back.

There was a bit of feedback this time and a discussion of some write-ins for the puzzler last time.

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