Digital image processing
1.Digital image processing is the use of computer algorithms to perform image processing on digital images. ... It allows a much wider range of algorithms to be applied to the input data and can avoid problems such as the build-up of noise and signal distortion during processing.
2. A digital image is a numeric representation, normally binary, of a two-dimensional image . Depending on whether the image resolution is fixed, it may be of vector or raster type. By itself, the term "digital image" usually refers to raster images or bitmapped images (as opposed to vector images).
3. DIGITAL IMAGES are electronic snapshots taken of a scene or scanned from documents, such as photographs, manuscripts, printed texts, and artwork. The digital image is sampled and mapped as a grid of dots or picture elements (pixels).
4. Digital image processing algorithms can be used to:
5. Image processing is a method to perform some operations on an image, in order to get an enhanced image or to extract some useful information from it. It is a type of signal processing in which input is an image and output may be image or characteristics/features associated with that image.
6. Sampling and quantization. In order to become suitable for digital processing, an image function f(x,y) must be digitized both spatially and in amplitude. Typically, a frame grabber or digitizer is used to sample and quantize the analogue video signal. ... Quantization.
7.Digital photography is a form of photography that uses cameras containing arrays of electronic photo detectors to capture images focused by a lens, as opposed to an exposure on photographic film. ... Digital images are also created by non-photographic equipment such as computer tomography scanners and radio telescopes.
8. A digital image is a picture that is stored on a computer. It has been digitised, which means it has been changed into a sequence of numbers that computers can understand. ... You could create one in a piece of design software (like Paint or Photoshop), take one on a digital camera or scan one in using a scanner.
9.In a digital camera, exactly the opposite happens. Light from the thing you are photographing zooms into the camera lens. This incoming "picture" hits the image sensor chip, which breaks it up into millions pixels. The sensor measures the color and brightness of each pixel and stores it as a number.
10. Pre-processing is a common name for operations with images at the lowest level of abstraction -- both input and output are intensity images.The aim of pre-processing is an improvement of the image data that suppresses unwanted distortions or enhances some image features important for furtherprocessing
