It might help a bit, but if these are not just ‘jpg noise’ they may be light picked up as ‘scatter’ from any dust, oils etc on the lens surface – maybe the different colours from the very slight refraction they cause.
The compression on most cameras – even high-end ones is quite agressive & introduce a lot of ‘articles’, really quite noticable on solid colours – why a 6Mb photo ends up at 500k!
If you can – output in RAW format for optimum results as it’s uncompressed (so no jpg anomolies) – but take up loads of space on the card…and longer to save.
Dave