The number of bits per pixel used in the digital representation of an image. The intensity and colour of each pixel in the image are represented by an integer value or set of integer values. Tonal res [..]

The colour that when scanned produces values of 255, 255, 255 in an 8-bit scanner. Ideally the white point is 100% neutral reflectance or transmittance. See also Reflectance.

Developed by a consortium of imaging hardware and software manufacturers, TWAIN is a cross-platform interface for acquiring electronic images captured by TWAIN-compliant scanners, digital cameras and [..]

A type of motor that moves in discrete amounts with each electrical pulse. Steppers were originally the most common type of actuator engine, since they can be geared to advance a read/ write head one [..]

A type of motor that moves in discrete amounts with each electrical pulse. Steppers were originally the most common type of actuator engine, since they can be geared to advance a read/ write head one [..]

(adsbygoogle = window.adsbygoogle || []).push({}); The shutter speed controls how long the digital sensor is exposed to light. The faster it is, the less susceptible the camera is to movement.

An option on some scanners that emphasises detail by increasing the contrast of the boundaries between light and dark areas of an image.

A device that reads a printed page and converts it into a graphics image for the computer. It works by digitising an image – converting everything on the page (text and graphics objects) – into one ra [..]

To enlarge or reduce an image by increasing or decreasing the number of scanned pixels, or the sampling rate, relative to the number of samples per inch needed by the printer or other output device. S [..]

A technique used to recalculate an image’s pixel data values to produce a different size of image. It involves a process similar to “interpolation”, this being the term used for resampling to a larger [..]