Joe Pedit
Differential brightening, color shift, and noise reduction - 2023 May 7
Differential brightening, color shift, and noise reduction when using lighten mode to create star trail images. The numbers represent the average red, blue, and green values over a 51x51 pixel area. Adobe Lightroom manual white balance on second brightest grey patch yields color temperature of 2650 K and color tint of +18. The resultant red, green, and blue channel multipliers are 1.20, 1.00, and 3.30, respectively (i.e., the blue channel is weak in the tungsten lighting used so the blue channel brightens more than the red and green channels).
Differential brightening, color shift, and noise reduction - 2023 May 7
Differential brightening, color shift, and noise reduction when using lighten mode to create star trail images. The numbers represent the average red, blue, and green values over a 51x51 pixel area. Adobe Lightroom manual white balance on second brightest grey patch yields color temperature of 2650 K and color tint of +18. The resultant red, green, and blue channel multipliers are 1.20, 1.00, and 3.30, respectively (i.e., the blue channel is weak in the tungsten lighting used so the blue channel brightens more than the red and green channels).