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I took 3 pics of the moon with separate RGB filters that are jpegs. The moon moved slightly for each image. Is it possible to align the pictures then combine them or do I have to have images that don't move? I understand you may do this with layers so what is the difference between layers and channels in this case. Im trying to use photoshop CS4 but am very new at this.
>I took 3 pics of the moon with separate RGB > filters that are jpegs. The moon moved slightly > for each image. Is it possible to align the pictures > then combine them or do I have to have images that > don't move? I understand you may do this > with layers so what is the difference between layers and channels in this > case. Im trying to use photoshop CS4 but am very new at this.
>I took 3 pics of the moon with separate RGB > filters that are jpegs. The moon moved slightly > for each image. Is it possible to align the pictures > then combine them or do I have to have images that > don't move? I understand you may do this > with layers so what is the difference between layers and channels in this > case. Im trying to use photoshop CS4 but am very new at this.
> >I took 3 pics of the moon with separate RGB > > filters that are jpegs. The moon moved slightly > > for each image. Is it possible to align the pictures > > then combine them or do I have to have images that > > don't move? I understand you may do this > > with layers so what is the difference between layers and channels in this > > case. Im trying to use photoshop CS4 but am very new at this.
On Nov 2, 10:35 pm, "TomA" <T...@nospam.com> wrote:
> I took 3 pics of the moon with separate RGB > filters that are jpegs. The moon moved slightly > for each image. Is it possible to align the pictures > then combine them or do I have to have images that > don't move?
First, crop the images so that you are only playing with the moon.
Second, blow the images up 2X to 4X depending on how much main memory your computer has. This will allow you to do sub-pixel alignment.
Thrid, Select an image. Select-All (ctrl-A) Copy (ctrl-C). Change image to the one where you are compositing the image, Paste (ctrl-V) Fourth, Select other image, Select-All (ctrl-A) Copy (ctrl-C). Change image to the one where you are compositing the image, Paste (ctrl-V)
Fifth, pull down the tools menu, Select the move tool (looks like a cross hair with a circle in the middle) Sixth, pull down the layers menu. click on one of the layers you just pasted in, then click to make the other image invisible
At this point the up, down, left, right keys on your keyboard will move the selected layer. As you zoom in (ctrl-+) and out(ctrl--), the keys move less or more so move the image to where its close, then zoom in and align it the best you can
On Nov 3, 5:35 am, "TomA" <T...@nospam.com> wrote:
> I took 3 pics of the moon with separate RGB > filters that are jpegs. The moon moved slightly
Hmmm, I am assuming you want to shoot the colors of the moon if you are shooting RGB.
Usually, one shoots through RGB filters with a dedicated astro CCD camera. if that's the case, you should shoot in FIT (FITS) format and not in jpegs. Jpegs will have a bunch of issues while FIT files will allow you to make the most of the data you collect.
but I was more concerned about the RAW vs JPEG issue from a photography point of view than anything else. Still, it shows the limitations once you go through a jpeg stage.
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