PixInsight Forum (historical)

PixInsight => Image Processing Challenges => Topic started by: naiteekv on 2019 April 23 03:06:54

Title: Photometric color calibration issues
Post by: naiteekv on 2019 April 23 03:06:54

I try to color calibrate my image with Photometric Color Calibration Tool (PCC)
But it simply fails to plate solve.
I have tried following

Checked Force plate solving
Checked and unchecked Ignore meta data
Changed Automatic limit magnitude and entered different values
Changed Log Sensitivity
Tried all database servers
Based on forum suggestions i halved my pixel size and tried doubling my focal length
Uninstalled - Re-installed Pixinsight

Please help me find a solution and get this wonderful tool working..

Thank you... :)

Title: Re: Photometric color calibration issues
Post by: dld on 2019 April 23 03:58:45

Hello,

Can you upload your image somewhere (Dropbox, Google Drive, etc)? Also can you provide some more info like the approximate coordinates of the image center and the arcsecs per pixel value?

Title: Re: Photometric color calibration issues
Post by: Andres.Pozo on 2019 April 23 07:50:27

https://pixinsight.com/forum/index.php?topic=12737.msg77585#msg77585 (https://pixinsight.com/forum/index.php?topic=12737.msg77585#msg77585)

Title: Re: Photometric color calibration issues
Post by: naiteekv on 2019 April 23 21:33:17

I Checked the FITS Header.. The focal length is proper there. @dld sure i shall upload the file and share link. But PCC does not work with any of my stacked file. It used to work before perfectly. BTW i am using ZWO 071 Camera

Title: Re: Photometric color calibration issues
Post by: naiteekv on 2019 April 23 22:41:26

I solved via image solver script. Still it is not able to solve the image. I have checked several times regarding parameters, they are cent percent correct. What am i missing? I use Platesolve 2 for my plate solving during capture and it is solving this image properly

Title: Re: Photometric color calibration issues
Post by: Andres.Pozo on 2019 April 24 01:15:12

Have you used DrizzleIntegration or resampled the image? Your camera has a resolution of 4944X3284 pixels but in the capture that you have posted the status bar says 9888x6568.
If this is the case you have to multiply by two the focal length or divide by two the pixel size.

Title: Re: Photometric color calibration issues
Post by: naiteekv on 2019 April 24 01:36:41

i did not use drizzle integration, yet i tried solving by doubling my focal length

Title: Re: Photometric color calibration issues
Post by: naiteekv on 2019 April 24 02:37:08

I am so sorry guys, yes Drizzle was on.. I thought it is off... so clumsy of me... Thank you everyone for help. It is now solving as usual.. :)