LRGB COmbination on grayscale images

[Alex McConahay]

I'm working on my second big set of data with Pixinsight. First time, I ran the script for Batch Pre Processing, and got, among other things, L,R,G, and B lights. I then combined with an LRGB combine and went from there.

Later this evening, I started on my second set of data on another object. I ran the Pre Processing script and got another set of L, R, G, B lights. Went to LRGB Combine and was told "Cannot execute instance on view: (Filename). Reason:LRGB Combination cannot be executed on grayscale images."

I changed the images (Color Space Conversion/Convert to RGB Color) to RGB, and when I tried to load them into LRGB Comibnation I got "No Compatible Images."

What is happening here?

I have tried exiting the program, and restarting. I have even tried after restarting the computer. Same problem. And, now the data I was using this morning gives me the same "Cannot be executed on grayscale images."And if you cannot combine with grayscale images, and RGB are not acceptable, then what does one use.? Is this another bit of terminology I am missing here?

So, anybody know what I'm doing wrong here? Particularly intriguing since it worked this morning and not this afternoon. And this morning's operations will no longer work.

Alex

[GJL]

Hi Alex,

did you check Options/CFA Image by mistake?

Gerhard

[Alex McConahay]

Gerhard,

Thank you for the suggestion. I went back and checked. The only place I could see a CFA box to check was in the preprocessing script. It was unchecked. Just to make sure, I ran a subset of Lights through the batch preprocessing script with the box UNCHECKED. When I tried to LRGB combine the frames from that run, I got the same result  ("Cannot combine on Grayscale Images").

Besides, how would that explain not being able to combine the data set I had worked with earlier in the day?

IS there another place to where the CFA box shows?

And a generic question. There is an error message for "Cannot combine on Grayscale Images." Makes me wonder--what other kind of images would it ever try to combine but grayscale? Are there not only two kinds of images--grayscale and RGB. RGB's are already combined. Grayscales are the only thing left to combine on.

Alex 

[pfile]

maybe all that's going on is that you are clicking the square apply button and not the round one. square = apply to active view, round = apply global. if you are clicking the square button then PI is trying to do an LRGB merge into the selected view which is probably a greyscale image, and it's telling you it can't put 3-plane color data into a monochrome image.

one way to use the LRGB combine is to load all 4 images into the tool and press apply global. the other way is to load only an L image and apply it to an RGB image (either by dragging the triangle to the RGB image, or by activating your RGB view and clicking the square apply button)

rob

[Alex McConahay]

Yep, that was it.......Thanks, Rob,

So much to learn..So many buttons, switches, checkboxes to screw up.

Now I have my Propeller to play with all day. (Propeller Nebula that is.)

Alex

[jerryyyyy]

BTW, you can also use ColorCombination to merge files and PixelMath. 

BTW2, let me use this post as the excuse to ask a question.... I was wondering if it makes any difference which application you use.  Is LRGB better for stretched images... I think there is some lore to this effect somewhere.   

[pfile]

Yep, that was it.......Thanks, Rob,

So much to learn..So many buttons, switches, checkboxes to screw up.

Now I have my Propeller to play with all day. (Propeller Nebula that is.)

Alex

believe it or not, by a band called "propellerheads":

"Banks and banks of humming machinery
I've never seen so many knobs
We're gonna have to do something, Charlie
Try pushing that button there

No, how about that one
No, not that one either
I know, I'll try pushing this one
Hold my hat, would you?
There's a good fellow"

http://www.youtube.com/watch?v=naUQe_3umhg

rob