| Science Forum Index » Astro - Amateur Forum » aligning RGB pics... |
|
Page 1 of 1 |
|
| Author |
Message |
| TomA... |
 Posted: Mon Nov 02, 2009 11:35 pm |
|
|
|
Guest
|
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. |
|
|
| Back to top |
|
|
|
| Pennwalt... |
| Posted: Tue Nov 03, 2009 4:35 am |
|
|
|
Guest
|
"TomA" <Tom at (no spam) nospam.com> wrote in message
news:cqOHm.51300$PH1.6762 at (no spam) edtnps82...
[quote]I took 3 pics of the moon with separate RGB
filters that are jpegs. The moon moved slightly
for each image. Is it possible to align the pictures
then combine them or do I have to have images that
don't move? I understand you may do this
with layers so what is the difference between layers and channels in this
case. Im trying to use photoshop CS4 but am very new at this.
[/quote]
I believe an easier way to go might be to use Registax:
http://www.astronomie.be/registax/
You might have to dig thought the tutorials a bit to find what you're
looking for, but it can be done.
Pennwalt
--
-----------------------------------------------------------------
Tips for improving the taste of a worldwide delicacy:
http://tiny.cc/UticM |
|
|
| Back to top |
|
|
|
| yourmommycalled... |
| Posted: Tue Nov 03, 2009 6:08 am |
|
|
|
Guest
|
On Nov 3, 3:35 am, "Pennwalt" <ta... at (no spam) ebzz.com> wrote:
[quote]"TomA" <T... at (no spam) nospam.com> wrote in message
news:cqOHm.51300$PH1.6762 at (no spam) edtnps82...
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 believe an easier way to go might be to use Registax:http://www.astronomie.be/registax/
You might have to dig thought the tutorials a bit to find what you're
looking for, but it can be done.
Pennwalt
--
-----------------------------------------------------------------
Tips for improving the taste of a worldwide delicacy:http://tiny.cc/UticM
[/quote]
I will add a second to the registrax chorus. I really like how nicely
the user interface is put together |
|
|
| Back to top |
|
|
|
| Pennwalt... |
| Posted: Tue Nov 03, 2009 6:40 am |
|
|
|
Guest
|
If you want to try anyway in Photoshop:
http://starizona.com/acb/ccd/software/ps_lrgb.aspx
HTH, Pennwalt
--
-----------------------------------------------------------------
Tips for improving the taste of a worldwide delicacy:
http://tiny.cc/UticM
"TomA" <Tom at (no spam) nospam.com> wrote in message
news:cqOHm.51300$PH1.6762 at (no spam) edtnps82...
[quote]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.
[/quote] |
|
|
| Back to top |
|
|
|
| MitchAlsup... |
| Posted: Tue Nov 03, 2009 12:34 pm |
|
|
|
Guest
|
On Nov 2, 10:35 pm, "TomA" <T... at (no spam) nospam.com> wrote:
[quote]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?
[/quote]
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
Select other image and do similarly.
Mitch |
|
|
| Back to top |
|
|
|
| Pierre Vandevenne... |
| Posted: Tue Nov 03, 2009 1:20 pm |
|
|
|
Guest
|
On Nov 3, 5:35 am, "TomA" <T... at (no spam) nospam.com> wrote:
[quote]I took 3 pics of the moon with separate RGB
filters that are jpegs. The moon moved slightly
[/quote]
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.
Rob Gendler has a tutorial on line
http://www.robgendlerastropics.com/LRGB.html
As far as jpegs are concerned, the way to use photoshop is essentially
identical and the moon probably won't need a dedicated luminance
channel.
[quote]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.
[/quote]
this may help
http://www.designdsk.com/Tips/cell/Tips4R.html
Note: if you want to go for the colors of the moon, you could simply
use a DSLR, there's more than enough signal for this
I made a page about it
http://www.datarescue.com/life/kepler/moontests/raw_vs_jpeg.html
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. |
|
|
| Back to top |
|
|
|
| TomA... |
| Posted: Tue Nov 03, 2009 6:35 pm |
|
|
|
Guest
|
| Thanks for the responses ! |
|
|
| Back to top |
|
|
|
|
