can't remove noise
can't remove noise
Hi
My first go at st so please be patient:)
I'm having great difficulty getting noise removed from my dss fits file. I've followed many YouTube tutorials and I'm beginning to wonder whether the stack is at fault:
<edit>
https://drive.google.com/file/d/0B_uUt0 ... sp=sharing
</edit>
autodev really messes up the image and I can't retrieve it. Using dev is a little better but although I can see some detail, the noise reduction is poor.
Maybe it is the iso speed in camera:
nikon d40 at iso 800 then 12 or so light frames at 10-20 seconds with dark, bias and flat frames which *seem* to have worked but...
Any help especially if someone could check the fits file and comments on iso in camera before I spend any more time would be most gratefully recieved.
TIA
My first go at st so please be patient:)
I'm having great difficulty getting noise removed from my dss fits file. I've followed many YouTube tutorials and I'm beginning to wonder whether the stack is at fault:
<edit>
https://drive.google.com/file/d/0B_uUt0 ... sp=sharing
</edit>
autodev really messes up the image and I can't retrieve it. Using dev is a little better but although I can see some detail, the noise reduction is poor.
Maybe it is the iso speed in camera:
nikon d40 at iso 800 then 12 or so light frames at 10-20 seconds with dark, bias and flat frames which *seem* to have worked but...
Any help especially if someone could check the fits file and comments on iso in camera before I spend any more time would be most gratefully recieved.
TIA
Last edited by alacant on Thu Jan 28, 2016 7:07 am, edited 1 time in total.
Re: can't remove noise
Try auto dev-keep-crop-keep-wipe-keep- now dev manually stretch too suit -keep -work through modules turn off tracking at end of processing then denoise , hope this helps .
Re: can't remove noise
Hi
Thanks for that sequence. It's a lot better. I used the hds reveal, but that's the only module I used, I'm having problems with the colour cast. It seems to be red and also the stars have bloated. Do we have modules for colour and 'fat stars'? In the nef files the stars are quite sharp points.
Do forgive the newbie questions and thanks again, I feel I'm getting somewhere.
Thanks for that sequence. It's a lot better. I used the hds reveal, but that's the only module I used, I'm having problems with the colour cast. It seems to be red and also the stars have bloated. Do we have modules for colour and 'fat stars'? In the nef files the stars are quite sharp points.
Do forgive the newbie questions and thanks again, I feel I'm getting somewhere.
Re: can't remove noise
Dropbox your fits file so peeps can take a look at data .
Re: can't remove noise
Hi
There's a public link to the fits in the first post. Is that OK instead?
Thanks for your interest.
(I can Dropbox it too later if necessary)
There's a public link to the fits in the first post. Is that OK instead?
Thanks for your interest.
(I can Dropbox it too later if necessary)
Re: can't remove noise
You may want to amend that link think you picked the wrong file comes up with some sort of exam pdf
Re: can't remove noise
Oh... Sorry. No idea This is it:
https://drive.google.com/file/d/0B_uUt0 ... sp=sharing
https://drive.google.com/file/d/0B_uUt0 ... sp=sharing
Re: can't remove noise
Thats m45 though i think your settings in DSS need tweaking ,did you set matrix pattern for your camera in fits settings ,im no expert but your stars are bloated may be the cause
Re: can't remove noise
Hi
Sorry. I posted the wrong fits. This is M42:
https://drive.google.com/file/d/0B_uUt0 ... sp=sharing
I didn't have my camera, a nikon d40 listed in dss so I put nikon d50 which I think has the same sensor. Also, it was full moon and I used iso 800. Would this make a big difference?
Thanks for having a look.
Sorry. I posted the wrong fits. This is M42:
https://drive.google.com/file/d/0B_uUt0 ... sp=sharing
I didn't have my camera, a nikon d40 listed in dss so I put nikon d50 which I think has the same sensor. Also, it was full moon and I used iso 800. Would this make a big difference?
Thanks for having a look.
Re: can't remove noise
im not sure maybe ivo will have a better idea to whats causing bloating of stars .