Will downsampling, averaging a few pixels into one, reduce noise? Many people seems to believe so. Phil Askey was the first I read to debunk this theory in the Editorial blog post. Now even Canon’s Chuck Westfall is saying no – the sRAW formats on Canon DSLRs are not for noise reduction, actually there is no noticable noise improvement from the smaller RAW files. sRAW is for reducing file sizes for different needs.
Keywords: Downsampling, Noise Reduction, Reduce Noise, Sensor Noise, sRAW