The level of random variation in the pixels of digital photos. The pixels (photosites) on sensors record the levels of light falling on them as an electrical signal. However, there’s always a certain level of random background electrical activity which [...]
Tag Archive for 'Noise'
The sensor in a digital camera is equivalent to the film in a traditional camera. Where the film is processed at a lab to produce the image, digital cameras process the image data produced by the sensor and save the [...]
Reducing the appearance of noise with software. The physically tiny sensors in compact digital cameras and increasing megapixels don’t mix. The pixels on the sensors are now so tiny that they suffer badly from random digital ‘noise’ – it’s like [...]
Photoshop’s Noise filter has a number of uses, but perhaps the most obvious to photographers is that it adds digital noise to simulate film grain.
This is the ‘speckling’ effect seen at high ISO settings. It’s more prominent in cameras with physically small sensors (most compacts, and ‘superslim’ cameras in particular). The pixels on the sensor don’t just record the intensity of the light falling on [...]