wrote:
Download Iris (http://www.astrosurf.org/buil/us/iris/iris.htm)
Install Iris
Open Iris
Set the various defaults (read the manual first)
Go to the file menu and select the AVI conversion option
A pop-up menu will appear
Fill in the required field for the location of the avi file you want to
take the average of
If a color avi fill in the 3 fields with generic file names like: r_,
g_, b_
Click on the "Convert" button
At the end of the conversion process Iris will create 3 x n (with n =
to the number of unique frames in your original avi file) indexed files
in your default home directory named like r_1, r_2, r_3... and so forth
for the g and b channels frames
Open the command line menu (click on the fourth button from right on
the toolbar)
Iris will show you the last green channel frame in its window
After the "" type: add_norm r_ n (where n shall be replaced by the
number of frames Iris tells you he has created for each RGB channel)
The window may become white but don't worry
Go on the Processing menu and click on Divide
Type in the n value and click ok
Voila': you have you average R (or G or B) channel image
Save with an unique file name and repeat the process for the remaining
channels.
Once finished go on View menu and select the (L)RGB option
Fill in with the file names of your averaged R, G and B channel files
Click ok
Click on auto and adjust the visualization threshold band to suit your
taste. You can also modify the relative intensities of the RGB channels
by going to the View menu and selecting the White balance option
Save the resulting image in any file type supported by Iris
Have fun

Andrea T.


Thanks Andrea, I'll give it a try when I get the chance.

Lata,
Steve