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    • 84. 发明授权
    • Thermal gradation printing apparatus
    • 热分级打印设备
    • US5808653A
    • 1998-09-15
    • US835019
    • 1997-04-08
    • Yasuki MatsumotoHaruo YamashitaHideshi Ishihara
    • Yasuki MatsumotoHaruo YamashitaHideshi Ishihara
    • B41J2/365B41J2/36
    • B41J2/3551B41J2/3555B41J2/365
    • In the disclosed thermal gradation printing apparatus, heat elements in a line-type thermal head are divided into a plurality of groups, and an accumulated heat amount in the substrate of the thermal head for each group is estimated based on the pulse width data applied to each heat element considering the influences by heat accumulations in the main-scanning direction and in the sub-scanning direction. Based on the group division estimated accumulated heat amounts and the temperature of the body portion of the thermal head, a correction value for the pulse width data to be applied to each heat element. Moreover, the correction value is applied to the pulse width data for each heat element, so as to output the corrected pulse width data to the thermal head.
    • 在公开的热分级打印装置中,线型热敏头中的热元件被分成多组,并且基于应用于每一组的脉冲宽度数据来估计每组的热敏头的基板中的累积热量 考虑到在主扫描方向和副扫描方向上的积聚的影响的每个热元件。 基于分组估计累积热量和热敏头的主体部分的温度,对应于每个加热元件的脉冲宽度数据的校正值。 此外,将校正值应用于每个加热元件的脉冲宽度数据,以便将校正的脉冲宽度数据输出到热敏头。
    • 85. 发明授权
    • Color image forming method and an apparatus employed therefor, and a
correction factor determining method
    • 彩色图像形成方法及其使用的装置,以及校正因子确定方法
    • US5422738A
    • 1995-06-06
    • US229053
    • 1994-04-18
    • Hideshi IshiharaHaruo YamashitaYasuki Matsumoto
    • Hideshi IshiharaHaruo YamashitaYasuki Matsumoto
    • G03F3/08H04N1/60
    • H04N1/6019
    • A color image forming method and an apparatus to be used for executing the method are provided which are capable of effecting more faithful color reproduction with respect to a target color, and also, a color correction factor determining method to be used in the above method and apparatus. The color image forming apparatus to which the color image forming method is applied is arranged to subject three primary color luminance signals (R, G, B) to linear matrix calculation by a luminance matrix device for conversion into second luminance signals (R', G', B') to correct deviation of wavelength of the spectral absorbing characteristic of the ink, and to subject each color of the second luminance signals (R', G', B') to complementary color conversion into three primary color density signals (D.sub.R, D.sub.G, D.sub.B) by a complementary color converting device, and further, to subject the three primary color density signals (D.sub.R, D.sub.G, D.sub.B) to color correcting calculation by a color correcting device for conversion into ink density signals (C, M, Y), so as to correct color turbidity due to the unnecessary component of the ink. Additionally, the correction factor determining method determines the luminance matrix factor used for the luminance matrix calculation and the color correction factor used for the color correcting calculation by minimizing conditions of a color difference to be perceived by man.
    • 提供一种用于执行该方法的彩色图像形成方法和装置,其能够对目标颜色进行更忠实的颜色再现,以及在上述方法中使用的颜色校正因子确定方法和 仪器。 应用彩色图像形成方法的彩色图像形成装置被布置成将三原色亮度信号(R,G,B)进行线性矩阵计算,由亮度矩阵装置转换为第二亮度信号(R',G ',B')来校正墨的光谱吸收特性的波长偏差,并将第二亮度信号(R',G',B')的每种颜色互补色变换成三原色浓度信号 DR,DG,DB),并且还将通过颜色校正装置对三原色浓度信号(DR,DG,DB)进行颜色校正计算,以转换为墨密度信号(C,M ,Y),以便校正由于墨水的不必要成分引起的颜色混浊。 此外,校正因子确定方法通过最小化人感觉到的色差的条件来确定用于亮度矩阵计算的亮度矩阵因子和用于颜色校正计算的颜色校正因子。
    • 86. 发明授权
    • Image processing method for correcting a target pixel using emphasizing
and smoothing components
    • 使用强调和平滑分量校正目标像素的图像处理方法
    • US5390264A
    • 1995-02-14
    • US987220
    • 1992-12-08
    • Hideshi IshiharaHaruo YamashitaTsumoru Fukushima
    • Hideshi IshiharaHaruo YamashitaTsumoru Fukushima
    • H04N1/409G06T5/20G06K9/40
    • G06T5/20
    • In an image processing method for correcting a target pixel using emphasizing and smoothing components, a microcomputer stores the input image signal into an image memory, and generates the enhancement coefficient k data in the enhancement coefficient table memory using a function with an input/output characteristic whereby the output is a simple increasing value when the input is approximately zero. Using a first difference, which is the difference of the target pixel signal minus the signal of the reference pixel positioned on a first direction, the enhancement coefficient k is obtained by referencing the enhancement coefficient table, and the target pixel is enhanced proportionally to the enhancement coefficient k and the first difference. The target pixel is also gradated or smoothed in proportion to the enhancement coefficient k and the second difference, which is the target pixel signal minus the average of the signals of the second and third reference pixels, which are the reference pixels in the directions perpendicular to the first direction and on opposite sides of the target pixel. The target pixel signal is corrected by repeating this process for each of the reference pixels positioned on the four directions surrounding the target pixel, and the corrected image signal is stored to the image memory. The enhanced image signal is obtained by repeating this process for all input image signals.
    • 在使用强调和平滑分量校正目标像素的图像处理方法中,微计算机将输入图像信号存储到图像存储器中,并且使用具有输入/输出特性的函数在增强系数表存储器中生成增强系数k数据 从而当输入大约为零时,输出是简单的增加值。 使用作为目标像素信号减去位于第一方向上的参考像素的信号的第一差异,通过参考增强系数表来获得增强系数k,并且与增强成比例地增加目标像素 系数k和第一个差值。 与目标像素信号减去第二和第三参考像素的信号的平均值成比例的增强系数k和第二差分,目标像素也是渐变或平滑的,它们是垂直于 目标像素的第一方向和相对两侧。 通过对位于围绕目标像素的四个方向上的每个参考像素重复该处理来校正目标像素信号,并将校正后的图像信号存储到图像存储器中。 通过对所有输入图像信号重复该处理来获得增强图像信号。