A digital copying device with an adjustable reproduction characteristic. This characteristic maps optical densities ODin of an original document onto optical densities ODout of a copy that is to be made of the original. The device does the following: establishes the reproduction characte
A method and system of compressing digital image data organized as successive data groups of bits, the contents of which are values of pixels of an image, by checking a first condition of whether a first data group has the same contents as one or more following data groups. If the first
A method for checking in a text processing system the correct and consistent use of units, comprising the steps of: storing a list of symbols or production rules that represent units; storing criteria, that state whether or not a symbol or a combination of symbols is interpreted as a
