JSol'Ex : solar image processing in Java

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@YourTwitterHandle #DV14 #YourTag @[email protected] @[email protected] #Devoxx #SolEx #JsolEx #Solar JSol'Ex Solar image processing written in Java Cédric Champeau Oracle Labs

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] About me - Working at Oracle Labs on Micronaut Main focus on build plugins and dev productivitity @[email protected] - Formerly working at Gradle Inc - Author of static compiler of Groovy - Amateur astronomer @[email protected] https://www.astrobin.com/users/melix/ https://bit.ly/3eGD0GM (Youtube)

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project ● Sol’Ex = Solar Explorer ● Invented by Christian Build (amateur astronomer) ● Community driven and DIY http://www.astrosurf.com/solex/sol-ex-presentation-en.html

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project 10 Ångström (1 Å) = 1 nm

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project ● Can choose wavelength ● Very fine resolution (<0.2 Å), narrower than typical filters (several Å) ● Upgrade to star spectrography (Star’Ex project) ● But no direct images! ● Official software : INTI by Valérie Desnoux

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project Scan Direction (RA)

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Sol’Ex Project : Build your own! ● Azur3DPrint : 3d printed parts – https://azur3dprintshop.com/ – Coupon DEVOXX2023, 10% off Sol’Ex V2 (exp 30/10) ● Shelyak Instruments : optical kit – https://www.shelyak.com/

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] INTI ● Official software, Open Source, GPL ● http://valerie.desnoux.free.fr/inti/ ● Written in Python, Windows installer (1GB)

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] JSol’Ex backstory ● Educational purpose – Understand how Sol’Ex / SHG works – Am I still a capable developer ? ● Technical challenge ● Technology playground (JavaFX, vector API, ...) ● Show that Java is very capable for real science https://melix.github.io/blog/2023/04-22-introducing-astro4j.html

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] JSol’Ex ● Written in Java ● OpenSource, Apache version 2 ● https://github.com/melix/astro4j ● Installers for Windows, Linux, Mac (~50MB)

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] JSol’Ex ● Technology stack – JavaFX for UI – Micronaut for CLI – Java modules – JLink + JPackage for distribution – Experimental GraalVM native image binaries – Gradle for builing

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] JSol’Ex DEMO

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Jsol’Ex : geometric corrections

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Jsol’Ex : blurry / incomplete disks

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Jsol’Ex : ImageMath ● An expression language dedicated to processing ● One click : many results ● e.g Helium line processing, animation creation

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Jsol’Ex : lessons learnt ● Programming is fun ● Many challenging problems, math is hard! ● Scientific literature is hard to convert to algorithms ● Happy users are your reward for hard work ● Java 17+ : 😍 ● Java modules : 🤨

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Conclusion: Sol’Ex ● It’s real science ● https://bass2000.obspm.fr/home.php ● A bit of tinkering but extremely satisfying ● Some “forks” already exist ● Join us!

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#Devoxx #SolEx #JSolEx #Solar @[email protected] @[email protected] Resources ● Sol’Ex project: http://www.astrosurf.com/solex/ ● INTI: http://valerie.desnoux.free.fr/inti/ ● JSol’Ex: https://github.com/melix/astro4j ● Sol’Ex English mailing list: https://groups.io/g/Solex-English ● Azur3dPrint: https://azur3dprintshop.com/ ● Shelyak: https://www.shelyak.com/