View Single Post
  #1  
Old 07-11-2017, 09:27 AM
PKay's Avatar
PKay (Peter)
Registered User

PKay is offline
 
Join Date: May 2017
Location: DEPOT BEACH
Posts: 1,643
NGC 253 Comparison

Again, feel free to post (or repost) your 253's.

Attached is 2 images from the same data set.
300 of 30 sec. (Next time I will try 60 sec.)
Gain setting of 288. (Next time I will reduce that to 150.)

The first image is un cropped and basic post processing ie:
Background Neutralisation, SCNR (remove green), Colour Calibration and then a Histogram Stretch.
It reveals a very bad SNR (Signal to Noise Ratio) and there is no colour.
Probably because of my settings (above).

The secound image (same data):
Not a single pixel was left standing...
I threw at it every PI processing tool that would do something to help.

It certainly pays to get things right at the start :-(
Attached Thumbnails
Click for full-size image (NGC253_integration_02_ABE_SCNR_BN_CC.jpg)
198.2 KB102 views
Click for full-size image (NGC_253_JPEG.jpg)
180.5 KB141 views
Reply With Quote