Plate Solve Accuracy and Image Binning


#1

I am using PlateSolve2. I have set my Scope Centering settings to -
Attempts to center - 3 times
Until error is - 45 pixels
Use filter - Lum filter

Scope Frame and center settings -
Search - 100 regions
bin - 4x4
Exposure - 4 s

My centering has been flawless, usually taking only one or two attempts. But I am not sure how accurate I have been. My question - Is the 45 pixel error limit based on the natural 1x1 bin image pixels or the 4x4 bin image pixels?

I get the sense that the answer is: …the error limit is applied to the 4x4 bin pixel and my actual error in 1x1 pixels is 4x the reported error after success. Can you confirm my assumption?

Jim


#2

Jim:

My centering spec is less than 4 pixel error in 3 attempts. This has been highly reliable and is usually achieved on the second attempt. I shoot luminance, unbinned, 10 seconds. Not sure trying to save some time on the centering process is worth the trade off in accuracy, assuming you need highly accurate centering.

Charlie


#3

The error is converted to 1x1 before it is reported.


#4

Ken,
Thanks. That’s the answer I wanted to hear.

Jim


www.mainsequencesoftware.com