Melotte 15

Uznání a copyright: Maxim Usatov

Popis: Postup zpracovani: LRGB Combination (R=[H II], G=[O III], B=[O III]) Histogram Transformation Split to RGB ATrousWaveletTransform on G and B channels (K-Sigma Noise Thresholding) to denoise Generate Star Mask ATrousWaveletTransform to bring details out (with noise suppression) Resample to 1600px horizontal (resample mask too) ATrousWaveletTransform to bring details out (with noise suppression) Export to PNG Photoshop: Create Grayscale Layer via Desaturate, Overlay Grayscale as Luminosity over RGB Layer Select stars, expand 5 pixels, feather 5 pixels, invert, Shadows/Highlights: Shadows 1%, Width 56%, Radius 300px, Highlights 0%, Midtone Contrast +30 Flatten Levels (Subjective) Noise Filter - selective low luminosity (low SNR) parts Unsharp Mask

Technické údaje a postup:

Místo pořízení: Praha

Datum pořízení: 24.9. - 2.10.2011, Datum zpracovani: 18.1.2012 (zpracovani trvalo asi nekolik mesicu.)

Optika: Dalekohledy: 0.25m Aries Maksutov-Cassegrain a10" Aries f/15 Maksutov-Cassegrain, Montaze Astro-Physics 900GTO German Equatorial, Fokus: 2692mm, Kamera: QSI 532wsg (s 0.67X Astro-Physics CCD Telecompressor) Pointacni kamera: Moravian G1-0300 as Off-Axis Guider, Filtry: Astrodon Narrowband and Tru-Balance E-Series

Zpracování: Processing Software: MaximDL, PixInsight, Photoshop Software pro fotografovani a riznei dalekohledu: MaximDL, TheSky6, CCDAutoPilot, FocusMax, PinPoint

Postup: Porizovani: uzkopasmove filtry [H II]: 6.75 hod, [O II]: 6 hod. Celkove 12.75 hod.