Re: Extracting individual color pixels from DLSR (or other Bayer pattern) color images to run photometry in each color

Posted by ghawkins on Dec 31, 2022; 4:28pm
URL: http://astroimagej.170.s1.nabble.com/Extracting-individual-color-pixels-from-DLSR-or-other-Bayer-pattern-color-images-to-run-photometry-ir-tp1857p2071.html

Hi Karen,

Please, can you clarify the calculation of the luminosity image pixels?

The description above indicates the luminosity image pixels are the sum of all 4 sub-pixels within the Bayer encoded image.  However, it would be more representative if it was RED + BLUE + (GREEN1 + GREEN)/2.

Also, the Lumosity image is twice the size of the extracted r, ,g, b images.  Is this because the result is stored as a 32-bit rather than 16-bit image?

Best regards,

Gary