The first of these is the ISO setting of your camera. Unedited 100% crop, 6400 ISO, no noise reduction appliedīoth types of noise appear in some form in all digital images, however there are a number of factors which can cause increased noise. You can see both types of noise in the below image. The former appears as colored speckles and the latter appears as a grainy effect. There are two types of noise in digital photography, color noise and luminance noise. Noise appears as random color or brightness variations across an image, which can give it a grainy or splotched appearance on close inspection.
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