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.


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