公开(公告)号：EP1271927A2

公开(公告)日：2003-01-02

申请号：EP02077261.2

申请日：2002-06-10

申请人： EASTMAN KODAK COMPANY

发明人： Spaulding, Kevin Edward ,  Couwenhoven, Douglas W. ,  Yu, Qing

IPC分类号： H04N1/52

CPC分类号： H04N1/40087 ,  H04N1/52

摘要： A method for halftoning a multi-channel digital color image having an x,y array of color pixel values, wherein at least two color channels are similar having substantially the same color but with low- and high-densities, includes the steps of: providing a matrix of dither values for each group of similar color channels wherein two or more of the matrices of dither values are designed jointly to minimize a visual cost function; for at least one group of similar color channels, forming an inverted matrix of dither values by subtracting the value of each element of the matrix of dither values for that group from a predetermined maximum value, associating the inverted matrix of dither values with one of the low- or high-density color channels, and associating the matrix of dither values for that group with the other low- or high-density color channel of that group; for each color channel of the multi-channel digital color image modularly addressing the matrix of dither values associated with that color channel using the location of a pixel in the digital color image to obtain ad addressed dither value; using the addressed dither value for each color channel, together with the pixel value for the corresponding color channel, to determine an output halftone image value for each color channel.

摘要翻译： 一种用于半色调具有x的多通道的数字彩色图像的方法，彩色像素值Y的阵列，worin至少两个颜色通道是相似的具有基本相同的颜色，但与低和高密度，包括以下步骤：提供 抖动值的每组相似彩色通道worin抖动值的两个或更多个的矩阵被联合设计成最小化视觉成本函数的矩阵; 对于至少一个基团类似的颜色信道，通过从预定的最大值减去该组抖动值的矩阵的每个元素的值，抖动值的逆矩阵与的一个相关联形成的抖动值的逆矩阵的 低或高密度的颜色通道，和抖动值的矩阵该组与组的其他低或高密度色彩通道相关联所做; 对于多通道数字彩色图像模块化解决与使用像素的位置处的数字彩色图像中，以获得广告解决的抖动值在信道相关联的颜色值的抖动矩阵的每个颜色通道; 使用用于每个颜色通道的寻址抖动值，与相应的颜色通道的像素值一起，以确定性的矿井，以输出半色调图像值针对每个颜色信道。

公开(公告)号：EP1187061A2

公开(公告)日：2002-03-13

申请号：EP01203270.2

申请日：2001-08-30

申请人： EASTMAN KODAK COMPANY

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

IPC分类号： G06K15/10

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过次数，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大小，使得喷墨打印机产生图像。

公开(公告)号：EP0734150A2

公开(公告)日：1996-09-25

申请号：EP96104379.1

申请日：1996-03-20

申请人： EASTMAN KODAK COMPANY

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

IPC分类号： H04N1/405

CPC分类号： H04N1/4052 ,  H04N1/4053

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

摘要翻译： 公开了一种适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误差扩散方法。 该方法包括计算图像活动信号的步骤; 从图像活动信号计算一组活动权重; 响应于活动权重计算数字化连续色调输入像素的滤波输入值，并响应于每个可能输出电平的活动权重来计算滤波后的输出值。 该方法还包括根据误差准则，响应于滤波后的输入值和每个可能输出电平的滤波输出值来选择输出电平; 确定滤波后的输入值与所选输出电平的滤波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滤波输入值。

公开(公告)号：EP1239658A1

公开(公告)日：2002-09-11

申请号：EP02075707.6

申请日：2002-02-21

申请人： EASTMAN KODAK COMPANY

发明人： Parulski, Kenneth A. ,  Small, Jeffrey A. ,  Couwenhoven, Douglas W. ,  VanBlargan, Jason C. ,  Wess, Raymond E.

IPC分类号： H04N1/21

CPC分类号： H04N5/225 ,  H04N1/00278 ,  H04N1/00962 ,  H04N1/2112 ,  H04N1/2158 ,  H04N1/32128 ,  H04N2101/00 ,  H04N2201/001 ,  H04N2201/0049 ,  H04N2201/0053 ,  H04N2201/0055 ,  H04N2201/0082 ,  H04N2201/0086 ,  H04N2201/3242 ,  H04N2201/3274 ,  H04N2201/3278

摘要： A system wherein already-existing computing and memory resources in an electronic camera are used to process an image for printing. Rather than duplicating, in printers, computing and memory resources that are already in digital cameras, significant computing and memory resources need exist only in the camera. A digital camera can support many different printers, each with its own set of parameters such as for example print size, pixel size, colorimetry, sensitometry, and artifacts compensation. Printer parameters are uploaded from the printer to the camera to provide a basis for image processing specific to the associated printer, whereby compensation may be done for variations in the printer characteristics which may occur as a result of printer manufacturing variations, and further so that compensation may be done for different media types which may be installed in the printer.

摘要翻译： 已经存在的电子照相机中的计算和存储器资源用于处理用于打印的图像的系统。 在打印机，计算机和内存资源中已经在数码相机中复制，而不是在相机中存在显着的计算和内存资源。 数码相机可以支持许多不同的打印机，每个打印机都有自己的一组参数，例如打印尺寸，像素尺寸，比色法，感光度和人造物补偿。 打印机参数从打印机上传到相机以提供特定于相关联打印机的图像处理的基础，由此可以对因打印机制造变化而可能发生的打印机特性的变化进行补偿，并进一步使得补偿 可以为可能安装在打印机中的不同介质类型完成。

公开(公告)号：EP0734150A3

公开(公告)日：1998-03-11

申请号：EP96104379.1

申请日：1996-03-20

申请人： EASTMAN KODAK COMPANY

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

IPC分类号： H04N1/405

CPC分类号： H04N1/4052 ,  H04N1/4053

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

公开(公告)号：EP1271927A3

公开(公告)日：2004-03-31

申请号：EP02077261.2

申请日：2002-06-10

申请人： EASTMAN KODAK COMPANY

发明人： Spaulding, Kevin Edward ,  Couwenhoven, Douglas W. ,  Yu, Qing

IPC分类号： H04N1/52 ,  H04N1/40

CPC分类号： H04N1/40087 ,  H04N1/52

摘要： A method for halftoning a multi-channel digital color image having an x,y array of color pixel values, wherein at least two color channels are similar having substantially the same color but with low- and high-densities, includes the steps of: providing a matrix of dither values for each group of similar color channels wherein two or more of the matrices of dither values are designed jointly to minimize a visual cost function; for at least one group of similar color channels, forming an inverted matrix of dither values by subtracting the value of each element of the matrix of dither values for that group from a predetermined maximum value, associating the inverted matrix of dither values with one of the low- or high-density color channels, and associating the matrix of dither values for that group with the other low- or high-density color channel of that group; for each color channel of the multi-channel digital color image modularly addressing the matrix of dither values associated with that color channel using the location of a pixel in the digital color image to obtain ad addressed dither value; using the addressed dither value for each color channel, together with the pixel value for the corresponding color channel, to determine an output halftone image value for each color channel.

公开(公告)号：EP0604326A3

公开(公告)日：1994-12-21

申请号：EP93420487.6

申请日：1993-12-10

申请人： EASTMAN KODAK COMPANY

发明人： Couwenhoven, Douglas W.

IPC分类号： H04N1/46

CPC分类号： H04N1/50

摘要： A process for altering the phase of banding artifacts of a printing device deals with the separation of low frequency luminance modulation into higher frequency colored modulation. The individual writing element that is used to print each line of an image is changed between the color channels. In the process, each channel is printed so that original image data are registered. Lower frequency neutral bands are then converted to higher frequency colored bands to reduce visibility of the artifacts.

公开(公告)号：EP0604326A2

公开(公告)日：1994-06-29

申请号：EP93420487.6

申请日：1993-12-10

申请人： EASTMAN KODAK COMPANY

发明人： Couwenhoven, Douglas W.

IPC分类号： H04N1/46

CPC分类号： H04N1/50

摘要： A process for altering the phase of banding artifacts of a printing device deals with the separation of low frequency luminance modulation into higher frequency colored modulation. The individual writing element that is used to print each line of an image is changed between the color channels. In the process, each channel is printed so that original image data are registered. Lower frequency neutral bands are then converted to higher frequency colored bands to reduce visibility of the artifacts.

摘要翻译： 用于改变打印装置的带状伪影的相位的处理将低频亮度调制的分离处理成更高频率的着色调制。 用于打印图像的每一行的单独写入元素在颜色通道之间改变。 在此过程中，打印每个通道，以便注册原始图像数据。 然后将较低频率的中性频带转换为较高频率的彩色频带，以降低人造物的可视性。

公开(公告)号：EP0931663B1

公开(公告)日：2004-11-10

申请号：EP98204438.0

申请日：1998-12-23

申请人： EASTMAN KODAK COMPANY

发明人： Wen, Xin ,  Couwenhoven, Douglas W. ,  Lubinsky, Anthony Richard

IPC分类号： B41J2/205 ,  H04N1/053

CPC分类号： B41J2/04573 ,  B41J2/0458 ,  B41J2/04588 ,  B41J2/0459 ,  B41J2/04591 ,  B41J2/2132 ,  H04N1/047 ,  H04N1/40031 ,  H04N1/4015 ,  H04N2201/02439 ,  H04N2201/04781 ,  H04N2201/04793 ,  H04N2201/04794

摘要： Ink jet printing apparatus and method for improved accuracy of ink droplet placement on a receiver medium (30) by compensating for jet direction variabilities between ink nozzles (45). More specifically, the invention is an ink jet printing apparatus and method for printing an output image on a receiver medium in response to an input image file having a plurality of pixels. The apparatus includes a print head (50) and a nozzle integrally attached to the print head. The nozzle has a droplet placement characteristic, for example, undesired placement of the droplet on the receiver medium, associated therewith. A waveform generator (230) associated with the nozzle generates an electronic waveform (80) comprising a plurality of electronic pulses (90) to be supplied to the nozzle for adjusting the droplet placement characteristic. In this manner, the invention compensates for the undesired droplet placement characteristic, so that the droplet (47) is accurately placed on the receiver medium irrespective of physical variabilities between nozzles.

公开(公告)号：EP1187061A3

公开(公告)日：2003-10-29

申请号：EP01203270.2

申请日：2001-08-30

申请人： EASTMAN KODAK COMPANY

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

IPC分类号： G06K15/10 ,  H04N1/40

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.