O'Reilly logo

Raspberry Pi: Amazing Projects from Scratch by Richard Grimmett, Matthew Poole, Arush Kakkar, Ashwin Pajankar

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Noise

Noise means an unwanted signal. Image/video noise means unwanted variations in intensity (for grayscale image) or colors (for color images) that are not present in the real object being photographed or recorded. Image noise is a form of electronic disruption and could come from many sources, such as camera sensors and circuitry in digital or analog cameras. Noise in digital cameras is equivalent to the film grain of analog cameras. Though some noise is always present in any output of electronic devices, a high amount of image noise considerably degrades the overall image quality, making it useless for the intended purpose. To represent the quality of the electronic output (in our case, digital images), the mathematical term signal-to-noise ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required