Reducing the appearance of noise with software. The physically tiny sensors in compact digital cameras and increasing megapixels don’t mix. The pixels on the sensors are now so tiny that they suffer badly from random digital ‘noise’ – it’s like the background hiss on cheap audio cassettes. This noise looks like multicoloured speckling in the photo and gets worse at higher ISOs because it’s amplified. Makers try to get round it with in-camera noise reduction software. This attempts to suppress noise without harming fine detail, but it’s only partly successful. You end up with a choice between obvious noise and objectionable ‘smudging’ of fine detail.
0 Responses to “Noise reduction”