Field of view partially obscured by trees

Using SharpCap's Polar Alignment feature
Post Reply
mdolenga
Posts: 1
Joined: Sat Aug 15, 2020 8:37 am

Field of view partially obscured by trees

Post by mdolenga » Sat Aug 15, 2020 8:48 am

I am using the Polemaster camera with the latest QHY drivers and Sharpcap software installed. My issue is that my field of view is obscured by trees, and as I watch the frames come in, Sharpcap seems to identify many of the gaps between the branches as stars. I've tried a range of min and max pixel sizes without much success. If I wait until it is much darker, well into nautical twilight, it will succeed, but given that the stars are visible well before that, it's a frustrating delay. What settings are recommended for such an image? Is there some way to exclude the section with trees?
Capture_00002.png
Capture_00002.png (692.64 KiB) Viewed 295 times
Michael

User avatar
admin
Site Admin
Posts: 5210
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

Re: Field of view partially obscured by trees

Post by admin » Sat Aug 15, 2020 2:42 pm

Hi Michael,

in this case I'd recommend increasing the black level percentage value in the star detection settings until SharpCap stops picking up those gaps in the branches as stars – basically anything below the percentage specified by the black level is treated as black and so that should be an effective tool for eliminating this problem.

Cheers, Robin

Post Reply