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发明授权
CN103369196B 阈值矩阵生成方法、图像数据生成方法及生成装置、图像记录装置 有权

阈值矩阵生成方法、图像数据生成方法及生成装置、图像记录装置
摘要：
提供阈值矩阵及阈值矩阵生成方法、图像数据生成方法、图像数据生成装置及图像记录装置。图像记录装置的阈值矩阵生成部决定在生成阈值矩阵的矩阵区域中，以伴随灰度等级增加而追加网点的顺序为点亮顺序，决定各矩阵要素的阈值。在决定点亮顺序时，基于未决定点亮顺序的未决定矩阵要素与已经决定点亮顺序的已决定矩阵要素的距离，求得暂时评价值要素，在两个矩阵要素位于同一行或同一列，两个矩阵要素的距离等于要素间隔的两倍时，对暂时评价值要素进行修正，使基于评价值的评价变低，从而求出评价值要素。然后，决定基于作为评价值要素的合计值的评价值的评价最高的未决定矩阵要素的点亮顺序。由此，能够提供抑制产生格子状网点配置的阈值矩阵。
摘要（英）：

A threshold matrix generation part determines a turn-on order in a matrix area where a threshold matrix is generated and determines a threshold value of each matrix element. In determining the turn-on order, a temporary evaluation value element is obtained based on a distance between each undetermined matrix element whose position in the turn-on order has not been determined and each determined matrix element. If these matrix elements are located in the same position with respect to a row or column direction, the temporary evaluation value element is corrected such that the undetermined matrix element is less evaluated based on the evaluation value. Then, the position of an undetermined matrix element that is most highly evaluated in the turn-on order is determined. Accordingly, a threshold matrix that suppresses the occurrence of a grid-like dot pattern can be provided.

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