| 摘要 |
Information or data in the form of a mathematical representation of an area to be covered by a desired gray level, is sent, for example in floating point format, to a printer, e.g. a laser printer, for processing by the printer processor. The area to be covered is converted to a representation of pixels with the gray level converted to a digital value such as an eight bit value. Supercell representations with a gray level threshold matrix is provided, with each of the supercell array cells having threshold levels associated therewith whereby if the selected gray level is either above or below the threshold, one of print/no-print conditions are met for that pixel. Alternatively, if the level is the opposite and greater than a preselected range of values, the print/no-print condition will be opposite. If the gray level selected is in the direction of print, relative to the threshold level but is less than the full print level but within the range of values, then a look up table is entered corresponding to that threshold value and range and a length of time for laser turn on, corresponding to time slices, is selected dependent upon the difference between the gray level value and the threshold level. Pixel growth may proceed from either the left or right or some combination of both depending upon the coding. For example, the threshold level may include a range of value's in either direction causing growth to occur from either the left or the right edge of the cell.
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