Image Noise Definition Photography. These are pixels that do not represent the correct colour or exposure of the scene and can make the image look awkward. For digital cameras darker regions will contain more noise than the brighter regions.
In photography noise refers to irregular grainy spots that you see in images rendering the details of the image less sharp. Image noise is random not present in the object imaged variation of brightness or color information in images and is usually an aspect of electronic noise. Noise looks like tiny colored pixels or specks in your photograph and sometimes resembles the grain that you may see in film photography.
In digital photography image noise can be compared to film grain for analogue cameras.
The onset of this random variation generates what is called noise or grain which is basically formed by irregular pixels misrepresenting the luminance and tonality of the photograph. You will likely notice noise more in photographs taken in low light situations. Noise can distort the visual detail of your photo making it something that photographers try to avoid. What is image noise.