公开(公告)号：US06454389B1

公开(公告)日：2002-09-24

申请号：US09658800

申请日：2000-09-11

申请人： Douglas W. Couwenhoven ,  Rodney L. Miller

发明人： Douglas W. Couwenhoven ,  Rodney L. Miller

IPC分类号： B41J2145

CPC分类号： G06K15/107

摘要： A method of multipass inkjet printing of images in response to digital images having code values includes providing an inkjet printer capable of printing at least two ink drops at each printing location during different passes, including a printhead which can select at least two different ink drop sizes, and selecting a number of passes for producing an image and providing a print mask having mask values which, in each pass, sequentially corresponds to predetermined pixels and, in response to the mask values and the code values of such pixels, operates the inkjet printer to select the ink drop size for each pixel in each pass so that the inkjet printer produces an image.

摘要翻译： 响应于具有代码值的数字图像的多次喷墨打印图像的方法包括提供能够在不同通过期间在每个打印位置打印至少两个墨滴的喷墨打印机，包括可以选择至少两种不同墨滴尺寸的打印头 并且选择用于产生图像的通行数，并提供具有掩模值的打印掩模，所述掩码值在每次通过中顺序地对应于预定的像素，并且响应于这些像素的掩码值和代码值，操作喷墨打印机 以在每次通过中为每个像素选择墨滴尺寸，以便喷墨打印机产生图像。

公开(公告)号：US5975671A

公开(公告)日：1999-11-02

申请号：US657723

申请日：1996-05-30

申请人： Kevin E. Spaulding ,  Douglas W. Couwenhoven ,  Rodney L. Miller

发明人： Kevin E. Spaulding ,  Douglas W. Couwenhoven ,  Rodney L. Miller

IPC分类号： H04N1/409 ,  H04N1/52 ,  B41J2/205

CPC分类号： H04N1/409 ,  H04N1/52

摘要： A method for processing a digitized continuous tone image so that such processed image is adapted to be applied to an image rendering device which prints dots from a set of two or more possible dot-areas and from a set of colorants having different colorant concentrations is disclosed. The method includes selecting a set of N dot-area and colorant concentration combinations, each of said combinations producing a different integrated optical density value and multilevel halftone processing the digitized continuous tone image to produce an output image having a set of output levels wherein one member of the set of N dot-area and colorant concentration combinations is associated with each of the possible output levels.

摘要翻译： 一种用于处理数字化连续色调图像的方法，使得这种处理后的图像适于应用于从一组两个或更多个可能的点区域和从具有不同着色剂浓度的一组着色剂中打印点的图像渲染装置 。 该方法包括选择一组N个点区域和着色剂浓度组合，每个所述组合产生不同的积分光密度值，并且多级半色调处理数字化连续色调图像以产生具有一组输出电平的输出图像，其中一个成员 的N个点区域和着色剂浓度组合的组合与每个可能的输出水平相关联。

公开(公告)号：US5581371A

公开(公告)日：1996-12-03

申请号：US399678

申请日：1995-03-07

申请人： Kevin E. Spaulding ,  Douglas W. Couwenhoven

发明人： Kevin E. Spaulding ,  Douglas W. Couwenhoven

IPC分类号： H04N1/405

CPC分类号： H04N1/4053

摘要： An improved error diffusion method for producing an output image from an input image having a set of digitized continuous-tone pixels is disclosed. The method includes computing a visually perceived input value for a digitized continuous-tone input pixel and computing a visually perceived output value for each of the possible output levels. The method further includes selecting the output level in response to the visually perceived input values and the visually perceived output value for each of the possible output levels according to an error criterion; determining an error signal between the visually perceived input value and the visually perceived output value for the selected output level; and weighting the error signal and adjusting the computed visually perceived input values for nearby pixels which have not been processed.

摘要翻译： 公开了一种用于从具有一组数字化连续色调像素的输入图像产生输出图像的改进的误差扩散方法。 该方法包括计算用于数字化连续色调输入像素的视觉感知输入值，并计算每个可能输出电平的视觉感知输出值。 该方法还包括响应于视觉感知的输入值和根据错误标准的每个可能输出电平的视觉感知输出值来选择输出电平; 确定视觉感知的输入值与所选输出电平的视觉感知输出值之间的误差信号; 并对误差信号进行加权并调整对于尚未处理的附近像素的计算出的视觉感知输入值。