The original in 16-bit mode is linear 14-bit acquire using Umax PowerLook III scanner into Photoshop 15-bit space and then cropped.

Increasing saturation in gamma space :

1. increases lightness.
2. creates hue-shift.

Linear space processing

1. Open the original linear higher bit-depth image.
2. convert to 8-bit mode.
3. increase saturation by +20 using Hue/saturation dialog.
4. apply inverse gamma 2.2.
5. save as jpeg using quality factor 4.

Gamma-space processing

1. Open the original linear higher bit-depth image.
2. apply inverse gamma 2.2.
3. convert to 8-bit mode.
4. increase saturation by +20 using Hue/saturation dialog.
5. save as jpeg using quality factor 4.