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Re: [APML] Southern Orion reprocessed
Hi Pere Sanz,
> Congratulations for the image!
Thank you very much!
>I've been following your comments on
>the processing steps that you applied to the image. You mention a PIP
>procedure. What does PIP stand for?
It stans for Power Inversed Pixels. In its origins was a procedure made throught PixInsight's PixelMath (It is a task similar to PS's Apply Image, avalaible only in the Standard Edition). Now the procedure has been improved a lot, including a power paramether, that allows a user selecteable aggresiveness of it. It is not a modulation (i.e., combine with the original image). Also, we are including two more improvements, that we hope will make it a more powerfull task. BTW, SMI has been implemented too with a power paramether, and will share the same improvements as PIP (in fact they are user selecteable functions of a process called Exponencial Transforms).
>It appears to be a processing method
>to enhance faint details similar to SMI.
Yes, they are very similar methods. The standard PIP (order 1) is less agressive than SMI (order 1). IMO, PIP reaches better results... don't ask me why, perhaps is my illution becouse I discovered it <vbg>.
> Can PIP be applied with photoshop?
Nope. Photoshop does not allows a power operand between images (^).
> A step by step procedure would be appreciated.
Well, if you buy PixInsight Standard (when avalaible), you'll have the Exponencial Transform Process. There you can select the function, PIP or SMI (PIP is the default), and then the order (power) in a range from 0.1 to 6. Values below 1 reaches less agressive results, and over 1 just the opposite. You can also select the size of the convolution filter that is applied from a range from 0 to 20 px (if you understand the well known SMI procedure, I think that you don't need what is this for). We are going to implement an edges protection (similar to SGBNR) and a paramether that decreases the result values of the shadows, to prevent the background to become too much bright.
As you can see, it is a easy-to-use and powerfull task... Hope you'll like it when avalaible. (And sorry for the "publicity") <g>
Regards,
Carlos Milovic F.
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Astro & Photo - CMF
http://www.astrophoto.vze.com
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Visita "AstroFoto", el foro de astrofotografía en español
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