Abstract: A method and a system of calibrating a scanner that has a scanning element. The method includes scanning data with the scanning element, and determining an intermediate value of the scanned data. The method also includes determining a variation value of the scanning element, and determining a data freedom value based on the intermediate value and the variation value.

Abstract: Methods for establishing or configuring imaging device settings use the luminance and chrominance values of an original document. The document is identified as either a text document or a photograph based at least in part on the luminance values of the document's pixels, and identified as black and white or color document based at least in part on the chrominance values of the document's pixels. The settings of the imaging device may then be based at least in part on whether the document is a text or photograph, or black and white or color.

Abstract: An image sensor has two or three rows of imaging elements, all the imaging elements being of the same size. This provides the rows with a native resolution. The image sensor is also provided with three shift registers. First and second shift register elements receive information from respective corresponding imaging element in a first and second row of imagining elements while shift register elements of the third shift register receive information from four imaging elements. The four imaging elements form a super-pixel, allowing the sensor to output information in a low resolution mode, as well a native and a high resolution mode.