DITHER-PATTERN

PURPOSE: To prevent a drop in real density of picture image on memory medium lower than nominal density by letting address-designated record location form a near-continuously adjacent population and groups in each dither cell distribute substantially at random. CONSTITUTION: Incremental sequence dis...

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Hauptverfasser: DAGURASU AI HAINESU, PATORITSUKU II UERUBOON
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PURPOSE: To prevent a drop in real density of picture image on memory medium lower than nominal density by letting address-designated record location form a near-continuously adjacent population and groups in each dither cell distribute substantially at random. CONSTITUTION: Incremental sequence distribution of successive reference values of groups in dither cell is nearly at random, and reference values of record locations in a group have been so arranged that the upper left is the least reference value and adjacently rising in succession therefrom. With increase in color density determined with specific combination of hue and degree of saturation, accordingly, groups in the dither cell are addressed nearly at random, and record locations in specific groups are regularly addressed so as to neighbor in succession. Consequently, picture image of print region in each group is formed with continuously contagious points only. According to this, influence of blur, aberration and the like of points printed on record medium can be reduced in comparison with the dither pattern in the past.