SharpCap & PixInsight stacking

Somewhere to ask questions about the best way to use SharpCap
Post Reply
umasscrew39
Posts: 110
Joined: Fri Apr 28, 2017 1:28 pm
Location: Central Florida
Contact:

SharpCap & PixInsight stacking

Post by umasscrew39 » Sat Jul 13, 2019 11:24 pm

Hi

I saved my live stacks as they appeared on the screen and then used PI to enhance the color and reduce the noise further. They were not bad but I know that is not really the correct way to do it. So, I have two questions:

1. If I want to stack in SC, what is the best format to save the stack in order to use it in PI? I am using an ASI OSC camera (294MC, 385MC).

2. If I prefer to save individual frames in SC and then stack in PI, what is the best format to save the frames?

Thanks,
Bruce

User avatar
admin
Site Admin
Posts: 3162
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

Re: SharpCap & PixInsight stacking

Post by admin » Sun Jul 14, 2019 8:21 am

Hi,

The answer to question one depends on what you want to do in pixinsight. If all you want to do is tweak the image that you see on screen in SharpCap then you should save the stack from life stacking as a 16-bit stack includes the adjustments like colour balance and stretch from the live stacking panel. If you want to redo the stretching and colour balancing completely in pixinsight then you should save the stack as a 32 bit raw stack, which just saves the raw data from the stack with no stretch or colour balance (dark and flat correction if enabled is applied to each individual frame before stacking so is included in the raw stack data).

As for question two, your best bet would be RAW16 in fits format.

Cheers, Robin

User avatar
admin
Site Admin
Posts: 3162
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

Re: SharpCap & PixInsight stacking

Post by admin » Sun Jul 14, 2019 8:28 am

Oops, incorrect information in the first part of the answer.

Save as 16-bit does not include the stretch and colour balance adjustments. The save with adjustments options further down the list does include those manipulations.the 16-bit is simply the raw data in the stack rescaled into the 16-bit range.

Sorry about that, Robin

umasscrew39
Posts: 110
Joined: Fri Apr 28, 2017 1:28 pm
Location: Central Florida
Contact:

Re: SharpCap & PixInsight stacking

Post by umasscrew39 » Sun Jul 14, 2019 10:02 am

Thanks much, Robin.

Option 1 is first choice but will try both. You probably are aware, but if not, the combination of SC+PI seems to be very popular. I think this combo is especially helpful in areas like mine where I have to deal with LP (Bortle 5) and often below average transparency with average seeing (not too different than in the UK). :)

Bruce

umasscrew39
Posts: 110
Joined: Fri Apr 28, 2017 1:28 pm
Location: Central Florida
Contact:

Re: SharpCap & PixInsight stacking

Post by umasscrew39 » Sat Jul 20, 2019 9:24 pm

Hi Robin

One more questions so I am clear. When I want to export the stack to use in PI, I choose the "save with adjustment" option. Should it be as a .png or ,fit or ,tiff file?

Bruce

User avatar
admin
Site Admin
Posts: 3162
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

Re: SharpCap & PixInsight stacking

Post by admin » Sun Jul 21, 2019 8:41 pm

Hi,

I think I would use the fit format personally as it has the most additional information saved in the file which can be useful later. The actual data save should be the same in all three formats.

Cheers, Robin

umasscrew39
Posts: 110
Joined: Fri Apr 28, 2017 1:28 pm
Location: Central Florida
Contact:

Re: SharpCap & PixInsight stacking

Post by umasscrew39 » Mon Jul 22, 2019 1:46 am

Good to know. I've been using .PNG Thanks much, Robin.

Bruce

Post Reply

Who is online

Users browsing this forum: Bing [Bot] and 2 guests