摘要:
Density calibration for a printer is achieved using a standard grey scale vignette master and a stored gray scale vignette image that the printer operator can invoke from the operator panel of a printer. The vignette image provides a pre-calibrated scale that is used in conjunction with the □standard□ image to determine the proper optical density. The density is then set by the printer control panel based upon the value obtained by visually matching the two grey scale vignettes.
摘要:
A system for configuring a first printer according to the grayscale printing characteristics of a second printer is described. Grayscale printing characteristics of a first and a second printer are characterized, and a transform between the grayscale printing characteristics of the first printer and the grayscale printing characteristics of the second printer is generated. This transform is used to modify the first printer grayscale commands so as to emulate the grayscale printing characteristics of the second printer.
摘要:
Toner/ink is saved while still being able to print any given color value within the full color gamut of a given printer. Combinations of varying percentages of a printer's toners/inks (cyan, magenta, yellow and black) are determined for maximum black substitution with varying percentages of under color addition (UCA) (e.g., 0%, 50%, 80%, and 100%). Patches of varying combinations of CMYK using maximum black substitution and a given percentage of UCA are printed out, and the color value (L*a*b*) of each patch is measured. Tables are generated having the percentage amounts of C,M,Y, and K and the corresponding measured color value. A first table represents maximum black substitution with 0% UCA. If a desired color value falls within this table, the corresponding CMYK combination represents the most toner/ink that can be saved. If a desired color value does not fall within the first table, subsequent tables representing increasing percentage amounts of UCA are examined. If the color is not found in any of the tables, the requested CMYK is unaltered. When the table is found, the corresponding CMYK combination, found through inversion and interpolation, saves some toner/ink while still being able to print the desired color value contained within that particular color gamut. The method is typically used to build a CMYK-to-CMYK transform table which the printer can use to print multi-color images with the minimum possible toner/ink usage and without sacrificing the image quality.
摘要翻译:保存墨粉/墨水,同时仍然可以在给定打印机的全色域内打印任何给定的颜色值。 确定打印机调色剂/油墨(青色,品红色,黄色和黑色)的不同百分比的组合用于在颜色加法(UCA)下变化百分比(例如0%,50%,80%和100%)的最大黑色取代 )。 打印出使用最大黑色取代和给定百分比的UCA的CMYK组合的不同组合的贴片,并且测量每个贴片的颜色值(L * a * b *)。 产生具有C,M,Y和K百分数的表和相应的测量颜色值。 第一个表格表示最大的黑色替代,0%UCA。 如果所需的颜色值落在该表格内,相应的CMYK组合表示可以保存的最多的墨粉/墨水。 如果期望的颜色值不在第一表中,则检查表示增加的UCA百分比量的后续表。 如果在任何表中找不到颜色,请求的CMYK不变。 当找到桌子时,通过反转和插补发现的相应的CMYK组合可以节省一些墨粉/墨水,同时仍然能够打印包含在该特定色域内的所需颜色值。 该方法通常用于构建CMYK到CMYK变换表,打印机可以使用它打印具有最小可能的墨粉/墨水使用的多色图像,并且不牺牲图像质量。
摘要:
A method, apparatus, and article of manufacture for configuring a first printer to print according to the grayscale printing characteristics of a second printer is described. The method comprises the steps of characterizing the grayscale printing characteristics of the first printer and the second printer, defining a transform between the grayscale printing characteristics of the first printer and of the second printer, and modifying the first printer threshold matrix in accordance with the transform. The article of manufacture comprises a computer-readable medium tangibly embodying the above described method steps. The apparatus comprises a scanner or densitometer for characterizing the grayscale printing characteristics of the first printer and the second printer, a processor for determining a transform between the grayscale printing characteristics of the first printer and those of the second printer, and for modifying the first printer threshold matrix in accordance with the transform.
摘要:
The system, method, and program of this invention is capable of taking as input a three dimensional colorant (e.g., CMY, L*a*b*) and determining an equivalent combination of colors made up of four or more colorants that are used by a given printer. A plurality of patches are printed having predetermined known combinations of varying percentages of three primary colors (e.g., CMY). Another set of patches are printed having predetermined varying percentages of a fourth color (e.g., black). The L*a*b* of these patches are measured. An inversion program is used to determine equivalent CMY component percentage values for the varying percentages of the fourth component based upon similar actually measured L*a*b* values. These determined CMY component percentage values and the known percentages of CMY are used to substitute the fourth colorant (K) for each of the original CMY combinations, known as fourth colorant substitution or black substitution.
摘要翻译:本发明的系统,方法和程序能够将三维着色剂(例如,CMY,L * a * b *)作为输入,并且确定由四种或更多种着色剂组成的颜色的等效组合,所述着色剂由 给定的打印机。 打印出具有三原色(例如,CMY)的变化百分比的预定已知组合的多个贴片。 打印另一组补片,其具有预定的第四颜色(例如,黑色)的变化百分比。 测量这些贴片的L * a * b *。 基于类似的实际测量的L * a * b *值,使用反演程序来确定第四分量的变化百分比的等效CMY分量百分比值。 这些确定的CMY组分百分数值和CMY的已知百分比用于代替第四着色剂(K)作为称为第四着色剂取代或黑色取代的每种原始CMY组合。
摘要:
The present invention provides an ink jet printer which has a mechanism for receiving and incrementing paper or other ink-receiving medium vertically and a print head and a mechanism for moving the print head horizontally across the paper. The print head has a plurality of orifices and associated operating devices to eject ink drops from each orifice. In particular, the orifices are configured such that there is a plurality of black ink orifices to print black ink, which is generated by a single black color from an orifice or orifices, and a plurality of color ink orifices to print color ink, whereby the color is generated by three different color inks, with each color ink being ejected from a separate orifice or orifices. The orifices are arranged in a pattern in which the orifices are spaced vertically and horizontally with respect to each other. In this pattern, there is at least one color ink orifice interposed or interspersed between two black ink orifices in the vertically spaced direction. The vertical spacing of the orifices is typically one dot distance. With this configuration, the full height of all of the orifices combined can be utilize for printing during a single swath for printing black lines or characters.
摘要:
Density calibration for a printer is achieved using a standard grey scale vignette master and a stored gray scale vignette image that the printer operator can invoke from the operator panel of a printer. The vignette image provides a precalibrated scale that is used in conjunction with the •standard• image to determine the proper optical density. The density is then set by the printer control panel based upon the value obtained by visually matching the two grey scale vignettes.
摘要:
A unique combination of four colorants (C′M′Y′K′) of a given printer that is equivalent to an externally defined four colorant combination (CMYK) by having the same color values (e.g., L*a*b* values). A fourth colorant, e.g., black, (K) of the externally defined four colorant combination is mapped to an equivalent fourth colorant (K′) of the printer by matching optical density, reflectance, L* or similar color value. The L* value is found for various percentages of the fourth colorant of the printer by printing varying percentages of the fourth component and measuring its L*a*b* values and, assuming a* and b* are near zero, using the L* value. These values are inputted into an interpolation program. Then, patches of varying percentages of each one of the three color components of the printer (CMY) are printed out at varying percentages. The L*a*b* values for each patch are measured and inputted into an inversion/interpolation program along with the corresponding percentages of colorants of each patch. The externally defined four component colorant having L*a*b* values also used in the inversion/interpolation program, which creates a color transform table from CMY with various percentages of K of the externally defined four dimensional colorant to C′M′Y′ with various percentages of K′ of the four dimensional colorant of the printer by matching L*a*b* values.
摘要翻译:通过具有相同的颜色值(例如,L * a * b *值),给定打印机的四种着色剂(C'M'Y'K')的独特组合等同于外部限定的四种着色剂组合(CMYK) 。 通过匹配光密度,反射率,L *或类似的颜色值,将外部限定的四种着色剂组合的第四着色剂(例如黑色(K))映射到打印机的等效第四着色剂(K')。 通过打印第四组分的不同百分比并测量其L * a * b *值,并且假设a *和b *接近零,通过使用L *值可以找到打印机第四着色剂的各种百分比的L *值, 值。 这些值被输入到插值程序中。 然后,以不同的百分比打印打印机(CMY)的三个颜色成分中的每一个的不同百分比的斑块。 测量每个贴片的L * a * b *值并将其输入到反相/插值程序以及每个贴片的着色剂的相应百分比。 外部定义的具有L * a * b *值的四组分着色剂也用于反演/插值程序,其从CMY生成了外部定义的四维着色剂的K的不同百分比的颜色变换表至C'M'Y' 通过匹配L * a * b *值,打印机的四维着色剂的各种百分比的K'。
摘要:
A system, method, and program of the invention determine a unique combination of four colorants (C'M'Y'K') of a given printer that is equivalent to an externally defined four colorant combination (CMYK) by having the same color values (e.g., L*a*b* values). L*a*b* values associated with each three component combination (CMY) with the fourth component value (K) equal to zero of the externally defined four colorant combination (CMYK) are used in an inversion/interpolation program The printer also prints out a matrix of predetermined varying combinations of the three colorants of the printer (CMY)p with the fourth colorant K equal to zero. L*a*b* values are measured for each patched. These values and the corresponding three colorant combination values are inputted into the inversion/interpolation program. For any given externally defined three colorant combination (CMY), or L*a*b* value, a corresponding three colorant combination (C'M'Y') of the printer can be determined from the inversion/interpolation program by matching L*a*b* values. Then, a fourth colorant, e.g., black, (K) of the externally defined four colorant combination is mapped to an equivalent fourth colorant (K') of the printer by matching color values (e.g., L*). For example, the L* value is found for various percentages of the fourth colorant through standard tables where C=0, M=0, Y=0. The L* value is found for various percentages for the fourth colorant of the printer by printing varying percentages of the fourth component and measuring its L*a*b* values and, assuming a* and b* are near zero, using the L* value. As such, the conversion takes place in two steps, from CMY to C'M'Y' and from K to K'.
摘要:
Disclosed is an improved method, in an impact matrix printer, for extending print ribbon life when used in printing bar codes and for improving the quality of bar codes printed by the ribbon, the printer including a dot matrix print head having a plurality of print pins and print hammers. The printer includes a medium to receive printed indicia thereon, and a print ribbon intermediate the print head and the medium, and means for effecting relative movement between the print head, the medium and the print ribbon so as to position opposite the print head different portions of the medium from time to time when the printer is operational and printing and to position different portions of the print ribbon intermediate the print head and the medium at preselected times when the printer is operational and printing. As is shown, the method includes the steps of determining when, under normal operating conditions, the print ribbon should be replaced because of an increase in errors in reading the bar code printed by the printer, for example, the color density of the narrower width lines are too light. Two ways of increasing the density of selected bar code lines of print are disclosed: (1) increasing the number of PELS (Picture Elements) per inch of print in at least selected printed lines of bar code, or (2) impacting the same print lines a greater number of times to increase the color density of at least selected PELS. In this manner, the useful life of the printer ribbon for printing bar codes and the quality of bar codes produced by the ribbon is increased without incurring printer throughput loss.