12-14-2017, 09:31 AM
(12-14-2017, 12:31 AM)godek Wrote:(12-12-2017, 09:46 AM)Ofnuts Wrote: Banding is color bands appearing in an area with a soft color change:, such a pale blue sky. Applying color filters leads to a reduction (sometimes rather dramatic) of the number of colors,so you get the same effect as Color>Posterize in random places.
Seems like the best option is to do the optical filters instead of the digital ones? What if you are doing it in 16bit same deal? Does photoshop have this problem?
Optical filters really just patch up things and are really accurate only for a given pair of {actual light temperature, film assumed color temperature}. Keeping all the data and doing post-processing is best.
Color loss is due to the nature of digital processing, but the fewer bits of data you have, the more acute it is. And Gimp 2.8 works on 8 bits/channel while Photoshop (and the next version of Gimp, and many other apps) can work on 16 bit or more, where this is much less visible.
Also, if you are dealing with these kind of issues, you should be "shooting raw" because the JPEG from your camera is 8bit/channel when the "raw" file from the camera sensor is 12 to 14bits/channel (even if in practice high-ISO noise reduces this somewhat). And if you shoot raw, you need a raw processing app to convert your sensor data, and all these apps have powerful color processing.