Not all noise reducing software is the same though, as each one can use a different type of technology. It's true that today's cameras offer way better image quality than in the past, but that's just made us more greedy for ever higher sensitivities! The fact is that any camera, even the latest, will generate increased image noise as you near its maximum ISO setting. Higher ISO sensitivities are the main culprit for induced noise as the higher ISO is set the noisier images become, but high ISOs are essential for capturing images handheld in low light. The same is true for how long the image sensor is exposing for, with longer exposures introducing 'heat-soak' noise whereby the photosites (pixels) record their own interference, or that of nearby circuitry. Typically though, the smaller an image sensor is, the more noise will affect a photograph. It can appear as differences in colour or brightness and there are multiple, complicated reasons for its existence. Image noise is generally seen as small, grain-like artefacts that appear like a rash on a digital image. Best monitors for photographers (opens in new tab).Best laptops for photo editing (opens in new tab).Best photo editing software (opens in new tab).

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