Input profiles
An input or 'capture' profile is made for all devices that are making an original digital image from some other analogue source, such as a digital camera or scanner.
The device is characterised by capturing a 'test target' with a range of established and standardised colour values. Each one of the colour patches on the target has a known value that is contained in an associated data file that accompanies the test target. First the test target is captured and then each one of the colour patches within the image of the target is compared against the corresponding value for that colour within the data file.