LRGB quad color composite method is
a new technique to make high S/N color images. It will
reduce the total exposure time for CCD cameras color images.
The LRGB stands for:
L - A luminous monochrome grayscale image
R - The red component of the color image
G - The green component of the color image
B - The blue component of the color image
The method works as follows:
1. Take a R, G, B images and a monochrome image (without
filter or with filter).
2. Make an RGB images from tree monochrome images taken with
a Red, Green and Blue filter, use the RGB combine function.
3. The LRGB function replaces the Intensity part of the RGB
image with the monochrome image.
This process is called LRGB quad color composite process,
where L means 'Luminance'. You do not need a high quality
RGB images, if you obtain a good monochrome image for the
Intensity part. Therefore you may take the RGB images with
the CCD-camera in 2x2 or 3x3 binning.