Using horton's steps for a SYNTHETIC' image that I was sure I was lost in...but I endured to get that image in my 34 above.
Went to the JPL site and opened the Pancam images.
Selected Sol 2913 and grabbed the first 2 R images. When you open the image and right click it will see the file has R1 way to the right. Save it.
And when you chose the next image beside it to open you will see R2 way to the right. Save it.
You now have the R1 and R2 images...I believe you can do this for all 7 R images that follow these 2 , which is what I am working on now-just to see what I get as a colored image.
Now you want to merge R1 and R2 to create the 'GREEN' -middle color in r G b.
So to do this open imagej.
Open your 2 saved R1 and R2 files. You will now have 2 neat looking images from the JPL site on your monitor.
Follow horton's step to merge the 2 images forming the 'GREEN' image in R 'G' B.
This merge forms the GREEN filter for the color dropdown next step.
R1 you have.
R2 you have.
avg you will have.
Now you have the formula: R1, avg[R1, R2] R2
But in Horton's 20 he says its: R2, avg[R1, R2] R1...somehow the R's are reversed positions-that's what through me off for I ended up with BLUE images. So I switched the 2 R's around and when merged in color got the correct image.
I also set Z-Projection to 'Average' Intensity. I played with that for several colored images and saw results I wouldn't publish.
For Color Merge I placed the R2 first as in horton's formula, then the Green merge you amde, then R1. I left the Gray as NONE...I'm playing with that too.
Took me awhile but got it worked out.