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公开(公告)号：US5296920A
公开(公告)日：1994-03-22
申请号：US945626
申请日：1992-09-16
CPC分类号： H04N1/00795 , H04N1/6027 , H04N9/69
摘要： A gradation correction apparatus for processing R, G, and B input signals includes a luminance signal conversion device for obtaining the original luminance signal, which is before gamma conversion, from the input signals, a luminance gamma conversion device for gamma converting the original luminance signal to the desired gradation characteristics to obtain a gamma converted luminance signal, a correction coefficient calculation means for obtaining a ratio of the gamma converted luminance signal to the original luminance signal, a first RGB operation means for multiplying the ratio by each of the R, G, and B input signals for obtaining primary gradation-corrected R, G, and B signals; a color difference signal operation means for producing a difference between each of the R, G, and B input signals and the original luminance signal; a second RGB operation means for adding the gamma converted luminance signal to each of the difference for obtaining secondary gradation-corrected R, G, and B signals; and an RGB determination means for obtaining final gradation-corrected R, G, B signals based on the primary and secondary gradation-corrected R, G, and B signals.
摘要翻译： 用于处理R，G和B输入信号的灰度校正装置包括用于从输入信号获得伽马变换之前的原始亮度信号的亮度信号转换装置，用于伽马转换原始亮度信号的亮度伽玛转换装置 获得所需的灰度特性以获得伽马转换的亮度信号;校正系数计算装置，用于获得伽马转换的亮度信号与原始亮度信号的比率;第一RGB操作装置，用于将该比率乘以每个R，G 和B输入信号，用于获得初级灰度校正的R，G和B信号; 用于产生R，G和B每个输入信号与原始亮度信号之间的差的色差信号操作装置; 第二RGB操作装置，用于将伽马转换的亮度信号加到每个差值上，以获得二次灰度校正的R，G和B信号; 以及RGB确定装置，用于基于一次和二次灰度校正的R，G和B信号获得最终灰度校正的R，G，B信号。
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公开(公告)号：US6101271A
公开(公告)日：2000-08-08
申请号：US821794
申请日：1997-03-21
IPC分类号： G03F3/00 , H04N1/40 , H04N1/407 , H04N1/46 , H04N1/48 , H04N9/64 , H04N9/69 , G06K9/00 , G03F3/08
CPC分类号： H04N9/69
摘要： The gradation correction device includes a luminance signal convertor to generate a luminance signal from the input R, G, B signals, a correction coefficient calculator which calculates the ratio to the luminance signal of the luminance signal after gamma correction to the predetermined gradation characteristics, and a multipliers to multiply the output from the correction coefficient calculator by each of the R, G, and B input signals. When the gradation correction is applied, effective brightness adjustment can be applied with no change in hue and saturation and without exceeding the dynamic range of a device.
摘要翻译： 灰度校正装置包括：亮度信号转换器，用于从输入R，G，B信号产生亮度信号;校正系数计算器，其计算与伽马校正之后的亮度信号的亮度信号与预定灰度特性的比率;以及 用于将来自校正系数计算器的输出乘以R，G和B输入信号中的每一个的乘法器。 当应用灰度校正时，可以在色调和饱和度没有变化并且不超过设备的动态范围的情况下应用有效的亮度调节。
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公开(公告)号：US5237625A
公开(公告)日：1993-08-17
申请号：US978459
申请日：1992-11-19
IPC分类号： H04N1/409
CPC分类号： H04N1/4092
摘要： An image contour enhancing device for enhancing contours in images in an image data formed by a plurality of pixel data includes differentiation circuits for differentiating the image data to produce first and second order differentiation signals. The first order differentiation signal represents an image data portion corresponding to front and rear edges of the contour, and the second order differentiation signal represents first and second half portions in each of the front and rear edges of the contour. The second order differentiation is used for a time modulation signal applied to a time modulation circuit to modulate in the time domain the image data in response to the time modulation signal such that the first half portion in the front and rear edges of the contour is delayed, and the second half portion in the front and rear edges of the contour is advanced.
摘要翻译： 用于增强由多个像素数据形成的图像数据中的图像中的轮廓的图像轮廓增强装置包括用于微分图像数据以产生第一和第二阶微分信号的微分电路。 第一阶微分信号表示对应于轮廓的前边缘和后边缘的图像数据部分，并且二阶微分信号表示轮廓的前边缘和后边缘中的每一个中的第一和第二半部分。 第二阶微分用于应用于时间调制电路的时间调制信号，以响应于时间调制信号在时域中调制图像数据，使得轮廓的前后边缘中的前半部分被延迟 并且轮廓的前后边缘中的后半部分前进。
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公开(公告)号：US5808653A
公开(公告)日：1998-09-15
申请号：US835019
申请日：1997-04-08
CPC分类号： B41J2/3551 , B41J2/3555 , B41J2/365
摘要： 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.
摘要翻译： 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。
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5.发明授权Color image forming method and an apparatus employed therefor, and a correction factor determining method 失效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
公开(公告)号：US5422738A
公开(公告)日：1995-06-06
申请号：US229053
申请日：1994-04-18
CPC分类号： H04N1/6019
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US5661575A
公开(公告)日：1997-08-26
申请号：US366028
申请日：1994-12-29
CPC分类号： H04N9/69
摘要： The gradation correction device includes a luminance signal convertor to generate a luminance signal from the input R, G, B signals, a correction coefficient calculator which calculates the ratio to the luminance signal of the luminance signal after gamma correction to the predetermined gradation characteristics, and a multipliers to multiply the output from the correction coefficient calculator by each of the R, G, and B input signals. When the gradation correction is applied, effective brightness adjustment can be applied with no change in hue and saturation and without exceeding the dynamic range of a device.
摘要翻译： 灰度校正装置包括：亮度信号转换器，用于从输入R，G，B信号产生亮度信号;校正系数计算器，其计算与伽马校正之后的亮度信号的亮度信号与预定灰度特性的比率;以及 用于将来自校正系数计算器的输出乘以R，G和B输入信号中的每一个的乘法器。 当应用灰度校正时，可以在色调和饱和度没有变化并且不超过设备的动态范围的情况下应用有效的亮度调节。
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公开(公告)号：US5644351A
公开(公告)日：1997-07-01
申请号：US160032
申请日：1993-11-30
CPC分类号： B41J2/3551 , B41J2/3555 , B41J2/365
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US5349373A
公开(公告)日：1994-09-20
申请号：US898442
申请日：1992-06-15
CPC分类号： B41J2/3555 , B41J2/36
摘要： A thermal head drive unit comprises electric power supply means for supplying electric power to heat-generating resistor elements arranged in a line in a thermal head. Head drive means is provided for electrically driving the heat-generating resistor elements in a lump by supplying electric power continuously variably in time to the heat-generating resistor elements depending on input gradation data. Head drive control means controls the head drive means in such a manner that, in a one-line recording time period composed of a power supply time during which electric power is supplied to the heat-generating resistor elements and an intermission time during which no electric power is supplied to the heat-generating resistor elements in disregard of the gradation data, the intermission time occupies a part not more than approximately 40% in the one-line recording time period.
摘要翻译： 热敏头驱动单元包括用于向热敏头中的线中排列的发热电阻元件供电的电源装置。 提供头驱动装置，用于通过根据输入的灰度数据向发热电阻器元件提供时间上连续可变的电力来一体地电驱动发热电阻元件。 磁头驱动控制装置以这样的方式控制磁头驱动装置，使得在由供电时间组成的单行记录时间段中，电力供应时间供给发热电阻元件，而间歇时间不包含电 电力被提供给发热电阻元件，不考虑灰度数据，间歇时间在单行记录时间段内占据不大于约40％的部分。
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9.发明授权Method and apparatus for forming color images by converting a color signal to a further color density signal 失效用于通过将颜色信号转换为另外的颜色浓度信号来形成彩色图像的方法和装置
公开(公告)号：US5448379A
公开(公告)日：1995-09-05
申请号：US077930
申请日：1993-06-18
CPC分类号： H04N1/6058
摘要： Method and apparatus for forming color images on paper using a sublimation type thermal transfer full-color printer using three color inks of yellow, magenta, and cyan. A color input signal to be printed is subjected to a first color correction process. The first color correction process performs a color correction using linear and non-linear masking operations and produces first ink-density signals. The first ink-density signals are judged for reproducibility by the printer by determining whether the signals fit within a gamut of colors. If judged to be reproducible, the first ink-density signals are passed on to the printer. However, if the first ink-density signals are judged to be outside the gamut of colors, the signals are subjected to a second correction process. The second color correction process first obtains a target color for color reproduction by the printer. Next, the second process sets ink-density signals, obtains predicted colors realized by the ink-density signals, chooses an output ink-density signal such that an evaluation value calculated by the target color and the predicted color becomes minimal, and produces a second ink-density signal that results in optimal colors within the range of colors reproducible by the printer.
摘要翻译： 使用使用黄色，品红色和青色的三色墨水的升华型热转印全色打印机在纸上形成彩色图像的方法和装置。 要打印的彩色输入信号经受第一颜色校正处理。 第一颜色校正处理使用线性和非线性掩蔽操作执行颜色校正，并产生第一墨水密度信号。 通过确定信号是否适合色域范围，由打印机判断第一墨密度信号的再现性。 如果判断为可再现，则将第一墨水密度信号传递到打印机。 然而，如果第一墨水密度信号被判断为在色彩范围之外，则信号经受第二校正处理。 第二颜色校正处理首先获得打印机的颜色再现的目标颜色。 接下来，第二处理设置墨密度信号，获得由墨密度信号实现的预测颜色，选择输出墨密度信号，使得由目标颜色和预测颜色计算的评估值变得最小，并产生第二 墨水密度信号，在打印机可重现的颜色范围内产生最佳颜色。
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公开(公告)号：US5315381A
公开(公告)日：1994-05-24
申请号：US879455
申请日：1992-05-04
CPC分类号： H04N1/6016 , H04N1/6022
摘要： In order to realize a method of color correction which is capable of performing the UCR compensating for the non-linearity of the superposed densities and the non-linear color correction meeting the non-linearity of the superposed densities at high accuracy with a configuration in substantially the same scale as the conventional linear UCR and linear masking techniques, there is provided a color correction method comprising first conversion means for converting the C, M, Y density information by a monotonously incremental non-linear function with a similarly monotonously incremental derivative, matrix means, and second conversion means for converting the same density information by a monotonously incremental non-linear function with a monotonously decremental derivative. In another aspect, there is provided four-color reproduction means comprising first conversion means for converting the C, M, Y information by a monotonously incremental non-linear function with a similarly monotonously incremental derivative, second conversion means, for effecting the conversion with a monotonously incremental non-linear function with a monotonously decremental derivative, and black separation means, subtraction means and matrix means interposed between the first and second conversion means for controlling the densities of the four inks to implement color recording.
摘要翻译： 为了实现一种色彩校正方法，该方法能够以高精度对叠加密度的非线性和非线性颜色校正的非线性进行补偿，以非常线性的方式满足重叠密度的非线性， 与常规线性UCR和线性掩蔽技术相同的尺度，提供了一种颜色校正方法，包括用于通过单调递增的非线性函数用类似的单调增量导数矩阵来转换C，M，Y密度信息的第一转换装置 以及第二转换装置，用于通过单调递增的非线性函数以单调递减的方式转换相同的密度信息。 在另一方面，提供了四色再现装置，其包括：第一转换装置，用于通过单调递增的非线性函数用相似的单调递增导数转换C，M，Y信息，第二转换装置，用于用 具有单调递减的单调增量非线性函数，以及插入在第一和第二转换装置之间的黑色分离装置，减法装置和矩阵装置，用于控制四种墨水的浓度以实现彩色记录。
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