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IDProjectCategoryView StatusLast Update
0002267CCdcielGeneralpublic20-01-17 23:29
Reporterhan Assigned To 
PrioritynormalSeverityfeatureReproducibilityhave not tried
Status resolvedResolutionfixed 
Target Version1.0 
Summary0002267: Improvement in image inspection
DescriptionAttached the code for two small improvements based on the code download a few hours ago.

I would like to propose two changes:

1) Add to a screen the five HFD values used for the trapezium.

2) Modified reporting for the tilt and curvature. The tilt is expressed in delta HFD rather then percentage. The curvature I would like call off-axis aberration and is also expressed in delta-HFD. The idea came up after some posting at cloudy nights. By implementing this the reporting will work better for out-of-focus images and is hopefully a more understandable unit.

https://www.cloudynights.com/topic/690595-what-does-percent-curvature-meanhow-is-it-calculated/page-2#entry9921579

Use attached code.
TagsNo tags attached.

Activities

han

20-01-17 22:38

reporter  

new tilt indication.png (1,189,172 bytes)   
new tilt indication.png (1,189,172 bytes)   

Patrick Chevalley

20-01-17 23:29

administrator   ~0006247

Thank you for this change.
Yes the delta HFD value are more easy to interpret than the percent. And nice to have the 5 values on the screen.
"off-axis aberration" term is good to clearly indicate what is measured, and finally this is the value we want to minimize, whatever the real optical cause.

https://github.com/pchev/ccdciel/commit/2b34cccca51e249ca61b45e08a02e06e4cb6c0cb

Issue History

Date Modified Username Field Change
20-01-17 22:38 han New Issue
20-01-17 22:38 han File Added: new tilt indication.png
20-01-17 22:38 han File Added: image inspection updated.zip
20-01-17 23:29 Patrick Chevalley Status new => resolved
20-01-17 23:29 Patrick Chevalley Resolution open => fixed
20-01-17 23:29 Patrick Chevalley Target Version => 1.0
20-01-17 23:29 Patrick Chevalley Note Added: 0006247