1. A method of converting a digital image comprising pixels corresponding to a plurality of intensities into a pattern of available output conditions, the method comprising: converting a scalar intensity value of a respective pixel into a vector containing N scalar values associated with the respective pixel, where N is greater than one, by applying one or more pre-determined mapping functions, thus forming a length-N vector corresponding to an available output condition; modulating the elements of said length-N vector by one or more pre-determined scalar values; binary-quantizing each element of said length-N vector into one of two quantized output levels to obtain a binarized length-N vector; converting the binarized length-N vector into the available output condition by a pre-determined mapping function; and outputting the resulting output condition to control a display.