Astral Imaging at Dogwood Ridge Observatory

Latitude: 3748'51.0" N"
Longitude:7823'41.0"W
Scottsville, Virginia 24590

 

(click on thumbnails to go to that image's page)

 

 

 

 

   

Pix Insight
A New User's Quick Start Experience
Using HDRWavelet Transform on Your Images

HDRWavelets should be performed on non-linear data, data which has been "stretched" by means of histogram transformation or curves.  First I start with the image I'm working on opened. In this example I use NGC2359-11_avg_c_DBE_HST. For this to work on the object only it's necessary to create and use a star mask. Using the "Star Mask" process found using either the top menu "Process", "All Processes", "Star Mask" or the "Process Explorer" , "Mask Generation", "Star Mask", you'll need to create a mask so that you can perform HDRWavelets on just the object of interest such as a galaxy or nebula. You'll need to experiment with creating a star mask but Harry's video will get you a fast start. After creating and applying the mask (by dragging the mask onto the left side boarder of the image you are applying it to. The cursor will turn to a box when it is properly positioned), invert it and then open the HDRWavelets process under "Wavelets". There you will see the following open module:

I will usually use the 3x3 or 5x5 Gaussian scaling function and select deringing to keep from getting artifacts. Try the different scaling functions to see which one does the best for you. Save when satisfied with your result.

 

 

    
  Last Modified :01/23/09 12:40 AM