Sky's Up Global Astronomy Magazine Volume III (September 2021) | Page 33

Figure 6- Autostakkert 2 ( freeware program for grading , aligning , and stacking solar , lunar and planetary images )
1 . Acquire Full Disk images 2 . Save AVI files ( 8 bits ) or SER files ( 12 bits ) 3 . Open AVISTACK http :// www . avistack . de / 4 . Select AVI or SER files - Open movie ( Avistack ) 5 . Turn off Update display ( Avistack ) 6 . Choose Batch processing ( several video files can be batch processed ) 7 . Open http :// www . astronomie . be / registax / 8 . Open FIT file ( aligned and stacked in Avistack ) 9 . Process the combined image using wavelet-based image restoration algorithms 10 . Reset the Wavelet filter ( 500 to 1000 center value ) 11 . Use layer 1 , 2 and 3 of Wavelet filter ( try several options ) 12 . Process image ( DO ALL button )
FULL DISK IMAGING ( White Light , Ca-K & H-alpha )
COURTESY OF Pedro Ré
13 . Save image ( 16-bit TIFF file ) 14 . Open Microsoft ICE http :// research . microsoft . com / en-us / um / redmond / groups / ivm / ice / ( mosaic imaging ) 15 . Compose the Mosaic ( drop individual images into Microsoft ICE ) Mosaic image ( Full Disk ) 16 . Crop and save 16-bit TIF file ( Microsoft ICE ) 17 . Process TIFF file in Photoshop 18 . Use Curves to adjust contrast and brightness if necessary Curves 19 . Use Shadow / Highlights option 20 . Use Smart Sharpen if necessary ( Photoshop ) 21 . Use False Colour Mapping 22 . Save the final 16-bit TIF file ( no compression ) 23 . Convert to 8-bit and save JPG file ( no compression ) References 1 http :// www . icnirp . org /
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The light between 100 nm and 400 nm is commonly called Ultraviolet ( UV ), [ UV-C , 100-289 nm ; UV-B , 280-315 nm ; UV-A , 315-380 nm ), red light beyond 780nm is called Infrared ( IR ). [ IR-A , 780-1400 nm ; IR-B , 1400-3000 nm ; IR-C , 3000 nm – 1 mm ]
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Heat damage to internal components have to be considered .
https :// astrosolar . com / en / information / about-astrosolarsolar-film / astrosolar-technical-info /
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These eyepiece filters usually crack due to excess heat when the telescope is pointed at the Sun .
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Some high-end video cameras have high-speed data transfer of up to 120 / s ( USB 3.0 , GigE and FireWire interfaces ).
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The first webcams were mainly used as video conferencing devices .
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8-bit avi files , 12-bit ser files .
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Registax - http :// www . astronomie . be / registax /, Autostakkert - https :// www . autostakkert . com / Avistack - http :// www . avistack . de /
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Images are aligned using hundredths to thousands of reference points . The best resolution images are then staked producing a high signal to noise ratio final composite image .
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Usually wavelet-based image restoration algorithms .
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Autostakkert can also be used to align , sort and stack individual frames http :// ww . autostakkert . com / 33