Askaniy

Astronomy student, Python programmer, occasional artist

[Askaniy @aAskaniy]

Current color table for some featured data (including Torifune and Kamoʻoalewa this time).
More options can be found here (https://t.co/N2pcsUHcjM) or generated for different categories.

[Askaniy @aAskaniy]

TrueColorTools v4.6 is out!
The changelog is dominated by new and updated spectral data. Thanks to LunaTheSilly, Pedro J. Garcia, Geobica, and SevenSpheres for their contributions!
https://t.co/2Z1NoCZgXZ

[Askaniy @aAskaniy]

Designed and rendered in Blender updated wordmark for @CelestiaProj
After some modifications, it will be used for the new splash screen that the community is currently working on

[Askaniy @aAskaniy]

Limb darkening in Celestia was primarily implemented by Hleb Valoshka, AstroChara calibrated the star textures, while Pedro J. Garcia and I helped in fixing. The animation also shows seamless transition to the resolved star rendering mode, which was developed by Levin Li and me

[Askaniy @aAskaniy]

The radio sources were rendered using CelestiaStarRenderer I developed and redesigned last month: https://t.co/qDE5rWIsOX

You can download the map and see more details on Flickr and DeviantArt:
https://t.co/miUyMpYEfX
https://t.co/LJsYR948JI

[Askaniy @aAskaniy]

What would the night sky look like if we could see it in radio waves? This synthetic false color map, which was created as a byproduct of my work with radio data, illustrates this hypothetical scenario.

Simple cylindrical projection, center right ascension 0°.

[Askaniy @aAskaniy]

I used GSM2016 model available in PyGDSM library to map diffuse radiation (with some patched parts) and SPECFIND V3.0 to map radio sources.

Sources:
https://t.co/bsr7Bv37vR
https://t.co/F9AfD8YsrT
https://t.co/si7MCVFlYB
https://t.co/8BSVfDgrSt

[Askaniy @aAskaniy]

You can import `RenderEngine` class from `https://t.co/dlWLVtpsTZ` to draw a star on a NumPy array canvas.
Cylindrical maps are also supported.

[Askaniy @aAskaniy]

I present a method of PSF star rendering that bypasses convolution to improve performance

Details and Python examples are available here: https://t.co/qDE5rWIsOX

Thanks to Levin Li for implementing it in Celestia! (Work in progress)

[Askaniy @aAskaniy]

@ToughSf Mars might be even blander... See https://t.co/GP8AiyiiXE
I recently reprocessed it one more time after adding better support for chromatic adaptation to TrueColorTools:

[Askaniy @aAskaniy]

Map of Mars in true colors: images from Mars Express were projected by Michael et al. (2024) and post-processed with TrueColorTools. TCT used the Tikhonov regularization method to reconstruct a spectral cube from four HRSC channels and simulated human perception of it.
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[Askaniy @aAskaniy]

@mightbejell0 It's not only Neptune! At least it's good that it made the news
I developed a program to calculate other colors of space objects: https://t.co/txQy5Y7naO
(In fact, it was created before Neptune's color was revealed)

[Askaniy @aAskaniy]

The texture map is intended for visualization purposes.
Also, I made a true color version (16-bit color depth).

Details:
- Simple cylindrical projection, planetocentric coordinate system, center longitude 0°.
- sRGB color space with chromatic adaptation for illuminant E.

[Askaniy @aAskaniy]

Last week, I processed a contrast-enhanced false color map of asteroid Ryugu by painting a mask to fill regions of unknown or corrupted data. The RGB values correspond to Hayabusa2's x, v, b filters.
Source: https://t.co/2O3OOfP1mm
Yokota et al. (2021): https://t.co/soBB12leHn

[Askaniy @aAskaniy]

@DonaldPMitchell Here is my collection of colors from the spectra of Mars. There are also differences between sources, but they are smaller.
The color table was generated here: https://t.co/txQy5Y7naO

[Askaniy @aAskaniy]

@AJamesMcCarthy @yuntao_lu I apologize if I came on too strong, agree that it's difficult to explain something briefly and have everyone understand it correctly. Thank you for your work on astrophotography (and Gregory updates)!

[Askaniy @aAskaniy]

@AJamesMcCarthy @yuntao_lu For example, here is Jupiter compiled directly from Hubble filters and after processing.

[Askaniy @aAskaniy]

@AJamesMcCarthy @yuntao_lu The problem is actually much more computationally complex than just “color balancing”... 😅
Discrepancies between filters and color matching functions significantly alter colors.
And practically everyone forgets about gamma correction...

[Askaniy @aAskaniy]

@AJamesMcCarthy @yuntao_lu I developed a program that reconstructs a spectral cube consistent with measurements so that it can then be “reshot” in RGB. Suggest taking a look:
https://t.co/txQy5Y7naO

[Askaniy @aAskaniy]

Simple cylindrical projection, center longitude 0°.
Gamma corrected, albedo scaled.
Color space: sRGB, while point: Illuminant E.
Links for the full resolution (11K, 2 km/pix):
https://t.co/x913dIy47k
https://t.co/7s2UR2RRQX
[3/3]

[Askaniy @aAskaniy]

Map of Mars in true colors: images from Mars Express were projected by Michael et al. (2024) and post-processed with TrueColorTools. TCT used the Tikhonov regularization method to reconstruct a spectral cube from four HRSC channels and simulated human perception of it.
[1/3]

[Askaniy @aAskaniy]

The original paper by Michael et al. (2024): https://t.co/lFchVz7gO6
The data archive used: https://t.co/7KiLiIurL6
TrueColorTools: https://t.co/txQy5Y7naO
A related article: https://t.co/NCZuIU2Hu6
[2/3]