HAO Colloquium - Craig DeForest, SWRI

Analyzing Images is Harder than You Think      

Image analysis is a mainstay of solar physics.  Images, spectral images, and polarimetry are central to the corpus of data that we use to understand the Sun.  These kinds of data have many advantages:  they are information-rich, viscerally compelling, and intuitively obvious to anyone who has eyes.   But image analysis, while disarmingly easy at a superficial level, is surprisingly difficult to get right.  Visual cues that are familiar from everyday experience can divert us to wrong interpretations; subtle linkages create surprising artifacts (for example, resolution effects can mimic scale height variations in the corona); and image data are often counterintuitive to interpret.  I illustrate, through cautionary examples, several subtleties of image analysis, advocate for rigor in image analysis, and describe some underappreciated tools and techniques that can help you improve your science.


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Wednesday, October 16, 2019 - 2:00pm to 3:00pm

Posted by Sheryl Shapiro at ext. 1567, sheryls@ucar.edu

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