cf723436__고화질_그림_지침___Wikimedia_Commons__분류
[공통적인 문제점들] Chromatic noise Luminance noise Visible grain Scratches, dust and dirt Spots [규정] Images should not have distracting amount of noise when viewed in full size. [토의] To reduce noise, use the lowest practical sensitivity or film speed (for example: 200 ISO film is less grainy than 1600 ISO!). If the photo was taken in unique circumstances and cannot be repeated, the image can sometimes be improved by filtering. Quality noise reduction software is expensive and algorithms computationally intensive. If you don't have access to suitable programs and equipment, ask at the Commons:Graphics_village_pump. [예시자료] Scan with dust and dirt No noise here, crisp and well-detailed. [분류] 
Noise
Commons:고화질 그림 지침 - Wikimedia Commons