Re: [APML] LRGB pathway

I agree with Jim in that it will often depend upon the object, but I usually wind up going the LRGB method. Many times with LAB mode I get crazy colors with a washed-out look, but not always.

Bobby Middleton

"----- Original Message -----

From: Jim Janusz

To: astro-photo@seds.org

Sent: Thursday, April 04, 2002 8:13 PM

Subject: Re: [APML] LRGB pathway

I find different results also and which is better is dependant on the image. Some are better with the LAB method and some are better with LLRGB. I have never determined why, so I usually try both and keep the one I like best. I know, very subjective and unscientific. (G)

Jim

----- Original Message -----

From: Tony Hallas

To: astro-photo@seds.org

Sent: Thursday, April 04, 2002 6:02 PM

Subject: Re: [APML] LRGB pathway

Well... I'm pretty much fed up with M51 by now! : - )   But it did bring up an interesting problem that the PS gurus might want to take a shot at... namely:

   There seems to be two ways to get an LRBG... you can either turn the RGB into Lab color (slight loss of data from what I have read) and copy the L to the clipboard... select the L channel of the RGB and paste it in...and then return to RGB...

or you can go the layers route where you keep the RGB intact, turn it into a layer, turn the L into a layer, and drag the layer icon of the L on top of the RGB choosing the "luminosity" mode of combining. Both these techniques assume that you have registered the images beforehand.

   I notice a slight difference in the end results, mostly of density... would anyone want to comment on the preference of one method over the other?

     Tony