"Luminance noise" refers to unwanted variations or disturbances in the brightness or intensity of an image. It can make the picture look grainy or pixelated. Full definition
High scores for texture and noise are a result of excellent detail preservation and low levels of luminance noise in outdoor and bright - light images, where the Nubia Z11 records more fine detail than the Samsung S7. (dxomark.com)
The Nubia Z11 displays fine detail preservation, with lower levels of luminance noise in the sky compared to the Samsung S7 (dxomark.com)
Noise is also well - controlled in flash exposures, with only a slight luminance noise visible in the outer field. (dxomark.com)