UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hello
Can I create a color image only for O3 with APP?
I photographed the squid star cloud, and it is well shown in monochrome images.
LRGBHOO synthesis does not have the color of the squid star cloud.
So I want to see the color image of O3 alone.
May the night be sunny
@mo-mo If you only use the OIII channel then the data by definition is mono. The pass band of the OIII filter is so small that is effectively eliminates any color information. In order to get a color image you need to at least combine OIII with an Ha (or R) image.
The lack of color in the LRGBHOO image may be due to the contribution of L. Adding that generally tends to wash out colors. Do you get colors if you create an RGBHOO image instead? If it does then we can help you add L as well while maintaining color.
HTH, Wouter
Thanks for the answer.
I tried RGBHOO.
Compared to LRGBHOO, the color of O3 is better, certainly.
And then I realized that I had encountered a new challenge. In other words, the entire image is biased toward bluish-green because the color of O3 is strong in all regions.
I think this is correct in principle, but I don't know how to emphasize only the squid nebula. It would be nice if the APP had a function for this.
thanks in advance
@mo-mo I am not sure what you mean with "emphasize" but if you mean "use a mask" then this is not possible (yet, I think) in APP. If you upload your L, R, G, B, Ha and OIII images then we can try and help you get the most out of it. Without any example it is hard to give you advice.
Wouter
hello
I uploaded six files to the folder.
I would be very grateful if you could give me some advice.
Thank you
@mo-mo Thanks for uploading the images.
The signal of the Bat Nebula in L is very low and the Squid is completely absent, which is why the colors become very pale when you use it. The signal of the Bat Nebula and particularly the Squid are very low in R, G and B, which is why they don't become very visible when combining all RGBHaOIII images. So you probably get the best result by
- Combining the R, G and B images into an RGB image.
- Combining the Ha and OIII images into an HOO image.
- Reducing the size of the stars in the HOO image.
- Combine the RGB and HOO images such that the star colors of the RGB image and the nebulae of the HOO image are used.
There are several posts on this forum that explain how to do that.
Wouter
