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ngc 2237 and surrounds in narrow band

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Geoff:

--- Quote from: caliu on 2012 June 20 18:24:48 ---Juan, desgraciadamente las he registrado con PixInsight, lo he probado de las dos formas, con StarAlignment y manualmente con DynamicAlignment, lo he probado con las imágenes lineales, con las imágenes estiradas, de todas las formas posibles y nada de nada, lo he probado con otros programas y el resultado es el mismo.

--- End quote ---

It's not really unfortunate.  I'm sure Juan will enjoy the challenge of sorting this one out.  The weird part is that it is not uniform over the whole region. The fact that other software packages give the same result suggests it must be something inherent in the images.
Here is a quote from the StarAlignment documentation:
This initial step is a critical part of the image registration task. If stars are not detected accurately, the whole process will fail, or it will perform unreliably.
Could it be that something in one of the component frames is preventing accurate star detection in the centre region.  I say one, because it seems to me that two of your frames register correctly and one doesn't.
Geoff

Philippe B.:
very nice image and color palette choice ! I like !

I got something close in my narrowband process

caliu:

--- Quote from: Geoff on 2012 June 21 07:34:20 ---
--- Quote from: caliu on 2012 June 20 18:24:48 ---Juan, desgraciadamente las he registrado con PixInsight, lo he probado de las dos formas, con StarAlignment y manualmente con DynamicAlignment, lo he probado con las imágenes lineales, con las imágenes estiradas, de todas las formas posibles y nada de nada, lo he probado con otros programas y el resultado es el mismo.

--- End quote ---

It's not really unfortunate.  I'm sure Juan will enjoy the challenge of sorting this one out.  The weird part is that it is not uniform over the whole region. The fact that other software packages give the same result suggests it must be something inherent in the images.
Here is a quote from the StarAlignment documentation:
This initial step is a critical part of the image registration task. If stars are not detected accurately, the whole process will fail, or it will perform unreliably.
Could it be that something in one of the component frames is preventing accurate star detection in the centre region.  I say one, because it seems to me that two of your frames register correctly and one doesn't.
Geoff

--- End quote ---

Complete agreement Geoff, we will see Juan says

caliu:

--- Quote from: Philippe B. on 2012 June 21 08:59:01 ---very nice image and color palette choice ! I like !

I got something close in my narrowband process



--- End quote ---

awesome image Philippe

Juan Conejero:

--- Quote ---The weird part is that it is not uniform over the whole region. The fact that other software packages give the same result suggests it must be something inherent in the images.
--- End quote ---

Indeed. Caliu, have you registered *all* the individual light frames for each filter with PI's StarAlignment, or just the three integrated narrow band images?

Getting that kind of misalignment is simply impossible with our StarAlignment tool, unless the images are already strongly deformed.

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