FYI: This is (like the sample from Cesarrojo) NOT banding.
This is definitively "Blooming" = an over-saturation of pixels with light, flowing into neighbour pixels, as described above by many.
Wikipedia's definition of "Banding":
"Colour banding is a problem of inaccurate colour presentation in computer graphics. While in 24 bit colour modes, 8 bits per channel should be enough to render images in the full visible spectrum, in some cases there is a risk of producing abrupt changes between shades of the same colour. For instance, displaying natural gradients (like sunsets, dawns or clear blue skies) can show minor banding.
Colour banding is more present with relatively low bits per pixel (BPP) at 16–256 colours (4–8 BPP), where not every shade can be shown because there aren't enough bits to represent them.
A possible solution is to introduce dithering, or increase the number of bits per channel".
Best regards,
Thierry
I had what looks to be the same type of banding problem when shooting into the sun. See the attached file for a full size crop. The second photo is the full photo for reference... the banding has been photoshopped out of it.
Luckily it was in a place where it could be easily photoshopped out.
Jeff
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