4/30/2024 0 Comments Denoiser 3 smooth colorsBlurring the noise in the direction of the gradient can help as well. One method similar to what I used to do in PS sometimes. You definitely want to do all processing in 16bit linear (if constrained to 0-1.0) or in floating point.This will help the banding as you work, but the final result can still have banding if there is no noise. For these types of photos, Topaz DeNoise AI is an incredible tool to help remove an uneven background sky. If you had a gradient from black to white (0-255) in the same 256 pixel area then you would have one pixel wide bands, which are not bands, but a smooth gradient. I primarily shoot deep-sky astrophotography images through a telescope, of distant nebulae and galaxies. So your bands will be 16pixels wide and pretty ugly. If you try to have a gradient between 0-16 (8bit values) across 256 pixels you will get one discrete value every 16 pixels. Ideally this noise is of varying sizes so it doesn't appear as just very sharp salt and pepper type noise. You need noise/grain to smooth things out. Now the distributors typically just do it without much tweaking-mainly automated. Compressing video at least used to be an art form. Of course this can make your bitrate jump up, and can cause other artifacts due to the bitrate limiter kicking in. If your video is to be compressed you will often get a better result adding more noise than you think because compression tends to remove noise as a first step in processing. Interestingly, typically OTA HD is a higher quality compression compared to cable or satellite- go figure). You see it all the time on TV shows, especially if they are compressed (which all are, either by streaming services, by the cable or satellite company, or by OTA broadcasters. Not only impossible in 3d video production, but impossible in any 8bit format, even live action.
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