Enhanced Video Noise
"Enhanced Video Noise" refers to footage that contains extraneous activity and/ or visible distortion/ pattern in grain structure; may make image appear blurry or overly “soft”.
Enhanced Video Noise impacts the Content Quality of the asset. If video noise is severe, then the image quality could be so degraded that on-screen action may be obscured.
Noise has enhanced activity, but appears to be creative/ consistent with the overall “look” of the content.
Video noise is excessive, overly distracting and obscures on screen elements. Scene has distinct “patterns” in the noise structure or noise is partially frozen in some places indicating a possible noise reduction filter error.
How to Prevent:
Reduce ISO - Recommended ISO for Red Weapon/Dragon is 800 ISO; using ISOs above this value will introduce noise. If ISO is used to manage changing lighting situations, different ISOs will introduce inconsistencies between shots.
Will require more, better lighting during production in certain situations.
Review single quadrant of image, if noise is significantly inconsistent or enhanced.
See if shot can be replaced with an alternate shot where lighting/ ISO is more efficient. Otherwise, see if noise reduction filter can be applied in post.
Post production “denoise” usually samples a solid texture for noise and allows the manipulation of the overall noise structure for the image. Be aware that this can soften the image or induce other errors, such as “frozen” grain or distortion/ patterning in the noise structure, which may be more detrimental to the quality of the image.