Red, Green and Blue channels - separate processing
Hi again.
Another thing I like looking at while processing my images, is how the individual red, green and blue channels look before recombining them into a colour image.
Most of you know my processing routine involves splitting the original colour avi into red, green and blue frames.
I then process each set of frames from each channel. That is, I drag the set of "red" bmp's into registax, align, stack, wavelets, save. I do the same for green and then blue.
I open them in AstraImage, and then do a LR deconvolution on them to sharpen and enhance the details further. Finally they are recombined back into a colour image, aligning the red and blue channels where the atmospheric dispertion shifted them.
The separate channels can show different amount of detail, and I like looking at the red and green channels especially, as they show stuff you sometimes don't see in the recombined image.
So here's an example of the red, green and blue channels, processed up to the point where they are about to be recombined.
The blue channel suffers the most from the effects of seeing and atmospheric dispertion - so any time you see reasonable detail in the blue channel, you've had a fairly good night.
Mike, you're in the midst of a planetary imaging tips blitz. This is great stuff. I'm of a mind to start posting all my images as LRGB and then the B&W images for R, G and B channels separately,. It really reveals fine detail you can't see in the combined. I notice the ALPO guys do this routinely.
Yes, after a while you start to see a pattern... the red channel almost always look good, as that wavelength is not very affected by the atmosphere. The blue channel is the real test of seeing, it can be an awful mess in poor seeing or it can be spectacularly good in good seeing - the shorter wavelength of blue light means that more detail is potentially visible in this channel than the others.
Thanks Mike top stuff , very interesting indeed . Definitely going to explore this , images plus has some nifty planetary techniques as well so plenty of time at the moment to experiment with rain around
I'm of a mind to start posting all my images as LRGB and then the B&W images for R, G and B channels separately,. It really reveals fine detail you can't see in the combined. I notice the ALPO guys do this routinely.
