草人 최광민: GIMP for Astro Images

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© 草人 최광민 2023-09-25

저작권(© 최광민)이 명시된 글들에 대해 저자의 동의없는 전문복제/배포 - 임의수정 및 자의적 발췌를 금하며, 인용 시 글의 URL 링크 만을 사용할 수 있습니다.

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GIMP for Astro Images

GIMP for Astro images

File/Open image
Image/Precision/16bit
Image/Scale Image (scale image width down to around 3500 pixels and hit enter)
Window/Dockable Dialogs/Histogram (opens histogram on the right)
View/Show layer boundary/off
View/Zoom/Fit Image in window
Color/Curves/make an aggressive ASTRO CURVE
Color/Levels/move MID arrow to left then left arrow (BLACK) to right (repeat this step as necessary to being out pic)
Color/Levels/RGB and line up each color on histogram to balance colors
Color/Curves/Value (move bottom dot to right to darken background and make a small tight "S" curve)
Tools/ Rotate 90* or 180* if necessary
CROP the edges
Filters/Enhance/NOISE REDUCTION (2x if necessary)
Filters/Enhance/SHARPEN
Color/Hue Chroma/LIGHTNESS (Lightness only to -3)
Color/Color Balance/Shadows, Midtone, Highlights with each color (+3)
Color/Temperature (slide top to left a bit & slide bottom to right a bit)
Filters/Enhance/NOISE REDUCTION (if needed again)
Color/Curves/make an "S" CURVE to bring out more color (Value & RGB separate) move bottom dot to right for more black then top "S" aggressive to the left for color
Color/Curves/make a REVERSE "S" CURVE for smoother Reds in Nebulas (optional)
Save as a GIMP .xcf file
EXPORT as .jpeg file

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