#How do you create these nice blue colors? With OSC and L-enhance filter?

21 messages · Page 1 of 1 (latest)

bold python
oak arrow
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i would like to know too

young forge
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those images were taken with mono camera & individual OIII & Ha filters

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but you can do it on OSC cameras too

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you just have to stretch the hell out of blue/green channels

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even better run some processing to extract Ha & OIII from RGB, then stretch the hell out of RGB. The OIII signal is generally very much weaker though so you will need long integration times

oak arrow
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can you send a youtube tutorial?

bold python
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I basically know how to do it but these blues, think i need to start shooting mono.

rosette_nevel.jpg Foraxx_clone_rosette.jpg
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Both same data first standard second split channels.

young forge
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when you stretch, just stretch the blue and green channels separately from the red

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e.g. here's a starless autostretch of soul

image.png
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so now I'll change to linear, go to the GHS stretch function & start stretching...

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see how my blue and green signal is smaller than red?

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so I turn off red channel, stretch again & then equalize the peaks on the graph with the black level slider. Now the blue is coming out a bit more

image.png
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I can do this a few more times then try a saturation stretch

image.png
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then I can spend ages fidding with the levels until I get the colour I want

image.png
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this was 60 secs for demo. obviously I'd spend MUCH longer being careful about introducing noise

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this is with Siril. if you use Pix, I guess the process would be similar

bold python
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Thanks for the effort, great. My process is completely different. Never used GHS in this way.👍

bold python