| 摘要 |
A structure of bands is associated with printhead-array image-forming elements, forming a printmask. Some band pairs are complementary. A low usage percent is stated for at least one band and a like value for another, a complement to each "at least one" band, to smooth the mask and image. The invention best sets a number N of passes, a wavenumber multiplier M for the image, and overall number B of bands NxMx2, the "2" accounting for odd and even elements; bands appear in order:first group of M bands, odd and even,second group of M bands, odd and even,. . .(N-1)th group of M bands, odd and even,Nth group of M bands, odd and even.In another novel aspect the invention has programming for creating a geometrical structure of bands, respectively associated with the image-forming elements and constituting the printmask. The invention also has programming for specifying a relatively low usage percentage for at least one particular band that is associated with image-forming elements that are not at either of the ends of the array; and programming for applying the printmask in said printing.
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