Chromatic noise creates a distinctive blotchy, rainbow-colour effect that’s easy to remove.
CHROMATIC Colour or ‘chroma’ noise is a multicoloured speckling, where neighbouring pixels show random colour variations. This is quite easy for noise reduction processes to remove without harming image detail, and you tend to see it on older cameras.
Luminance noise appears as a scattering of black dots across your images.
LUMINANCE Luminance noise is caused by random variations in brightness between pixels. It’s harder to deal with because noise reduction processes can’t readily distinguish noise from real detail. Reducing it will usually have an effect on fine detail too.