|
Max. Dithering with DSLRs is almost compulsory for a number of reasons, other than sub-pixel sampling. As Kevin mentioned masking calibration errors, evident in the attached images.
Thinking of consumer CMOS sensors as a whole, fixed pattern noise, banding, dead and hot pixels and so on. Dithering spreads the image over a greater sampling of good pixels, as well as improving flat fielding.
DSLR RAW data, particularly darks and lights is not particularly linear and calibration is not always accurate. Dithering evens all this out. If you have Berry and Burnell's Handbook... their advice is to dither by no less than 12 pixels. I find within reason the more the better 15+. Some software might limit this, so I guess work with what you have.
|