it can be assumed that the segments of the print head are sufficiently similar to one another in physical characteristics and performance and that the ambient milieu of each pair of overlapped segment is substantially the same the degree of overlap is then used to provide a mechanism for controlling the half toning between adjacent print head segments it is assumed that outputting of an image in the instant invention is by means of digital half toning employing any method or technique well known in the art many different half toning techniques can be utilized and reference is made to the text by ulichney entitled u201c digital half toning u201d published by mit press as shown in fig1 adjacent print head segments 2 3 overlap in the respective regions 12 13 the overlap region may extend approximately 40 thou u02dc 1 mm providing an overlap of 64 nozzles spaced at 16 microns for 1600 dpi resolution a temperature sensor 16 is placed on each print head segment 2 3 so as to provide for a measure of the current temperature characteristics of each print head segment 2 3 the current temperature measurement can then be utilized to determine the amount of overlap between adjacent print head segments alternatively fiduciary strips 100 101 on each overlapped segment 102 103 as shown in fig7 may be used to measure the degree of relative displacement of the segments 102.