Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1795  ·  IC 1805  ·  NGC 1027  ·  NGC 896
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IC 1805 (Heart Nebula) Blended SPCC and AutoColor, silversilk

IC 1805 (Heart Nebula) Blended SPCC and AutoColor

Getting plate-solving status, please wait...
IC 1805 (Heart Nebula) Blended SPCC and AutoColor, silversilk

IC 1805 (Heart Nebula) Blended SPCC and AutoColor

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Description

Here I thought it best to upload as a new image even though the data has been used before.  The technique used to create this color version includes data from the L-Extreme filter, and the L-Pro filter.  

I began with the L-Extreme data, where I clone the image and run SPCC on one and the AutoColor script created by Herbert Walter for Pixinsight (http://www.skypixels.at/pixinsight_scripts.html) on the other.  SPCC really boosts the Ha in the image almost too much (there is almost no sky background everything is RED) in my opinion and you get almost no Oiii or any other color.  Everything becomes red (including the stars).  I am not sure if this is an issue only for me but it only happens when using the L-Extreme filter and not on every target.   

I then process both images independently using the same work flow.  I do remove the stars and throw them out since they were basically unusable.  Once I have both images where I like them, I use the GHS script (https://remoteastrophotography.com/2022/04/generalized-hyperbolic-stretch-script-for-pixinsight-version-2-1) to blend the two images getting the outstanding Ha signal from the SPCC version, and the variation of color provided by the AutoColor version giving me the best of both.  In this particular case I created a mask to focus on the core of the heart since that's where I wanted to work on restoring some of the blue/teal colors. If i pushed much more it did not look very natural. 

Lastly, I had gathered about an hours worth of L-Pro data and used this to add the stars back in to restore the natural and vibrantly colored stars that are in this field.  

I hope this helps some of you who find that you have similar issues with the L-Extreme.  There is no doubt that the signal generated with this filter is amazing but getting back those natural colors is quite difficult.  After all it is a narrow band filter so what should I expect : )!

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IC 1805 (Heart Nebula) Blended SPCC and AutoColor, silversilk