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公开(公告)号：US4682186A
公开(公告)日：1987-07-21
申请号：US664763
申请日：1984-10-25
CPC分类号： H04N1/6027
摘要： A method for forming a color image by using a plurality of coloring materials and controlling quantities of the coloring materials in each pixel to form different colors is disclosed. When a density to be reproduced for at least one of the coloring materials exceeds a density reproducible for that coloring material, the quantities of other coloring materials are reduced.
摘要翻译： 公开了通过使用多种着色材料形成彩色图像并控制每个像素中的着色材料的量以形成不同颜色的方法。 当至少一种着色材料要再现的浓度超过该着色材料可再现的浓度时，其它着色材料的量减少。
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公开(公告)号：US4667228A
公开(公告)日：1987-05-19
申请号：US659948
申请日：1984-10-11
CPC分类号： H04N9/69 , H04N1/4074 , H04N1/6027 , H04N5/202
摘要： An image signal processing apparatus has a color decorder for preparing a histogram for the brightness level of each color signal of an input image signal such as an NTSC signal, and an image process circuit for calculating a cumulative brightness distribution curve of the histogram and for performing gamma-correction of the input image signal in accordance with the cumulative brightness distribution curve. A CPU in the image process circuit can calculate upper and/or lower extremities of each cumulative distribution curve and perform normalization of each color signal within the range defined by the calculated upper and/or lower extremity.
摘要翻译： 图像信号处理装置具有用于准备用于诸如NTSC信号的输入图像信号的每个颜色信号的亮度级别的直方图的颜色解码器，以及用于计算直方图的累积亮度分布曲线并用于执行 根据累积亮度分布曲线对输入图像信号进行伽马校正。 图像处理电路中的CPU可以计算每个累积分布曲线的上限和/或下限，并且在由计算的上和/或下肢限定的范围内执行每个颜色信号的归一化。
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公开(公告)号：US4959659A
公开(公告)日：1990-09-25
申请号：US212097
申请日：1988-06-27
CPC分类号： H04N1/50 , B41J2/2056 , H04N1/52
摘要： A method of and an apparatus for forming a color picture, which can provide sufficiently satisfactory picture quality and which can be made practicable in terms of cost and reliability utilizes colorants having a plurality of different densities with respect to at least one color among yellow, magenta and cyan provided to form a color picture. Assuming that the number of densities of each color of yellow, magenta and cyan is respectively N.sub.Y, N.sub.M and N.sub.C, the magnitude relation among them is set to be N.sub.M, N.sub.C >N.sub.Y.
摘要翻译： 一种用于形成彩色图像的方法和装置，其可以提供足够令人满意的图像质量，并且在成本和可靠性方面可以实现，使用具有多个不同密度的着色剂相对于黄色，品红色之中的至少一种颜色 并提供青色以形成彩色图像。 假设黄色，品红色和青色的每种颜色的密度数分别为NY，NM和NC，它们之间的大小关系设定为NM，NC> NY。
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4.发明授权Image forming apparatus which performs gamma correction on the basis of a cumulative frequency distribution produced from a histogram of image data representing a selected area of an image 失效图像形成装置，其基于从表示图像的选定区域的图像数据的直方图产生的累积频率分布进行伽马校正
公开(公告)号：US4931864A
公开(公告)日：1990-06-05
申请号：US412608
申请日：1989-09-27
CPC分类号： H04N1/4074 , H04N1/6027 , H04N5/202 , H04N9/69
摘要： An image forming apparatus for forming an image of a partial area of an entire image frame includes an apparatus for designating a part of a frame and apparatus for selecting an image formation operation for the predetermined area designated by the designating means or an image formation operation for the entire area. The image data corresponding to the predetermined area is read out and a histogram, indicating intensity distribution, is produced corresponding thereto. A gamma conversion characteristic is determined based on a cumulative frequency distribution produced from the histogram. The image data read out is converted in accordance with the determined gamma conversion characteristic. An image is formed on the basis of the converted image data representing the predetermined part of the frame or the entire frame. In such a partial printing, the contrast or gamma characteristic of the partial image may be appropriately corrected by a correction of the gamma characteristic according to the selection of the partial area.
摘要翻译： 用于形成整个图像帧的部分区域的图像的图像形成装置包括用于指定帧的一部分的装置和用于选择由指定装置指定的预定区域的图像形成操作的装置或用于 整个地区。 读取对应于预定区域的图像数据，并且产生指示强度分布的直方图。 基于从直方图产生的累积频率分布来确定伽马转换特性。 读出的图像数据根据确定的伽马转换特性被转换。 基于表示帧的整个帧的预定部分的转换的图像数据形成图像。 在这种部分打印中，可以通过根据部分区域的选择对伽马特性的校正来适当地校正部分图像的对比度或伽马特性。
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公开(公告)号：US4639747A
公开(公告)日：1987-01-27
申请号：US619340
申请日：1984-06-11
CPC分类号： B41J2/2128
摘要： There is provided a liquid jet recording apparatus comprising: recording heads whose recording densities vary in response to drive signals; drive circuits to drive the recording heads; a control circuit to output the drive signals through the drive circuits to the recording heads; and a timing pulse generator to supply a drive timing pulse for the recording heads to the drive circuits. During the recording interval, the timing pulse generator supplies the drive timing pulse even when all of or a part of the recording heads are not driven. At this time, the control circuit controls the levels of the drive signals for the recording heads which are not driven to less than the coloring threshold value of those recording heads. As a result, the multihead drive control section in the multihead recording apparatus such as a full color printer can be constituted by a simple circuit.
摘要翻译： 提供了一种液体喷射记录装置，包括：记录密度响应于驱动信号变化的记录头; 驱动电路驱动记录头; 控制电路，通过驱动电路将驱动信号输出到记录头; 以及定时脉冲发生器，用于向驱动电路提供用于记录头的驱动定时脉冲。 在记录间隔期间，定时脉冲发生器即使在全部或一部分记录头未被驱动时也提供驱动定时脉冲。 此时，控制电路控制不被驱动的记录头的驱动信号的电平小于那些记录头的着色阈值。 结果，诸如全彩色打印机的多头记录装置中的多头驱动控制部分可以由简单的电路构成。
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6.发明授权Color image picture forming process and apparatus which improves the quality of the black portions of the picture 失效彩色图像图像形成处理和装置，其提高图像的黑色部分的质量
公开(公告)号：US4682216A
公开(公告)日：1987-07-21
申请号：US585234
申请日：1984-03-01
CPC分类号： H04N1/6022 , B41M1/18 , H04N1/50
摘要： Color image picture forming process and apparatus can provide a picture with smooth shadow portions without false contours. When a black component of a color picture data is smaller than a predetermined value, the black component is expressed by using the combination of cyan, magenta and yellow colorants. When the black component is larger than the predetermined value, it is expressed by alternately using the black colorant and the three colorant combination. In another embodiment, picture quality can be enhanced by using a black colorant having a higher density than the cyan, magenta and yellow colorants.
摘要翻译： 彩色图像图像形成处理和装置可以提供具有平滑阴影部分而没有假轮廓的图像。 当彩色图像数据的黑色分量小于预定值时，通过使用青色，品红色和黄色着色剂的组合表示黑色分量。 当黑色成分大于预定值时，通过交替使用黑色着色剂和三种着色剂组合来表示。 在另一个实施方案中，通过使用具有比青色，品红色和黄色着色剂更高密度的黑色着色剂，可以提高图像质量。
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7.发明授权Method for recording a color image using dots of colorants of different densities 失效使用不同密度的着色剂的点记录彩色图像的方法
公开(公告)号：US4672432A
公开(公告)日：1987-06-09
申请号：US602732
申请日：1984-04-23
CPC分类号： H04N1/52 , H04N1/40087 , H04N1/502
摘要： A method for reproducing a halftone color image is disclosed, in which each picture element comprises a plurality of cells and one dot is formed for each cell. At least two colorent densities are used for at least some of the colors. When there is more than one combination of colorants which can represent a given density in a picture element, the combination having the largest number of dots is selected. In a preferred embodiment, more colorants of different densities are used for cyan and magenta then are used for black and yellow.
摘要翻译： 公开了一种再现半色调彩色图像的方法，其中每个像素包括多个单元，并且为每个单元形成一个点。 对于至少一些颜色使用至少两个相同密度。 当存在可以表示图像元素中的给定浓度的着色剂的多于一种的组合时，选择具有最大点数的组合。 在优选的实施方案中，用于青色和品红色的不同密度的更多着色剂用于黑色和黄色。
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公开(公告)号：US4635078A
公开(公告)日：1987-01-06
申请号：US603229
申请日：1984-04-23
CPC分类号： H04N1/40025 , B41J2/2056 , H04N1/40087 , H04N1/502 , B41J2/2128
摘要： A color image reproducing method uses at least cyan, magenta and yellow colorants, in which at least one color among them has a plurality of kinds of coloring densities. According to this method, various microdots having different densities are formed; sizes of these dots are variably controlled; one pixel consisting of a plurality of cells is provided; the frequency of occurrences in one pixel of the microdots of the high density colorant and of the microdots of the low density colorant is varied in accordance with a reproduction density; and the thick microdot and thin microdot have sizes so as to reproduce almost the same reflection optical density. An intermediate region which is not included in any of the density reproduction ranges of the high and low density colorants is set, and this mid-density region is reproduced using both of the microdots of the high density colorant and the microdots of the low density colorant. A dither matrix method may be used for this reproduction. As a result, false profiles can be prevented and a color picture image with high gradient and high quality is derived.
摘要翻译： 彩色图像再现方法至少使用青色，品红色和黄色着色剂，其中至少一种颜色具有多种着色密度。 根据该方法，形成具有不同密度的各种微点; 这些点的大小可变地控制; 提供由多个单元组成的一个像素; 高密度着色剂的微点和低密度着色剂的微点的一个像素中出现的频率根据再现密度而变化; 并且粗微点和薄微点具有大小以便再现几乎相同的反射光密度。 设置不包括在高密度和低密度着色剂的任何密度再现范围内的中间区域，并且使用高密度着色剂的微点和低密度着色剂的微点两者再现该中密度区域 。 抖动矩阵法可用于该再现。 结果，可以防止假轮廓，并且导出具有高梯度和高质量的彩色图像图像。
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公开(公告)号：US4772911A
公开(公告)日：1988-09-20
申请号：US62416
申请日：1987-06-16
IPC分类号： B41J2/52 , B41J2/205 , B41J2/21 , G06K15/10 , H04N1/23 , H04N1/40 , H04N1/58 , G01D15/18 , H04N1/26
CPC分类号： H04N1/40087 , H04N1/58
摘要： An image formation apparatus such as an ink-jet color printer has a head selection controller, a dither processor, and a selection switch for selecting the head selection controller or the dither processor. Dither processing or analog processing can be selected to reproduce any type of image with excellent quality.
摘要翻译： 诸如喷墨彩色打印机的图像形成装置具有头选择控制器，抖动处理器和用于选择头选择控制器或抖动处理器的选择开关。 可以选择抖动处理或模拟处理以再现具有优良品质的任何类型的图像。
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公开(公告)号：US4658300A
公开(公告)日：1987-04-14
申请号：US586189
申请日：1984-03-05
CPC分类号： G06T3/4007 , H04N1/3935
摘要： A video signal processing method and apparatus retrieves pixel signals by sampling an input video signal consisting of a plurality of horizontal scanning lines. In this method, the ratio of the number of vertical pixels to the number of horizontal scanning lines is set into for example 2 or less; in the vertical direction, the pixel signals of the vertical pixels are obtained by the interpolation on the basis of the pixel signals sampled from a plurality of horizontal scanning lines; while in the horizontal direction, the input video signal is sampled at the horizontal sampling frequency to be determined by that ratio. In the above interpolation processing, the ratio of the number of recording pixels to the number of original pixels in the direction of height or width of an image picture is set into ##EQU1## (where, n and M are positive integers). There is also provided a video signal recording system for recording the image picture in accordance with the pixel signals to be obtained by the sampling circuit on a recording paper. According to the present invention, it is possible to obtain and print out high-quality image pictures with desired various sizes without changing dot densities by means of a simple processing circuit.
摘要翻译： 视频信号处理方法和装置通过对由多条水平扫描线组成的输入视频信号进行采样来检索像素信号。 在该方法中，垂直像素数与水平扫描线数的比例设定为例如2以下; 在垂直方向上，通过基于从多条水平扫描线取样的像素信号进行插值而获得垂直像素的像素信号; 而在水平方向上，以水平采样频率对输入视频信号进行采样，以由该比率确定。 在上述内插处理中，将图像图像的高度方向或宽度方向的记录像素数与原始像素数的比率设定为
（其中，n和M为正整数）。 还提供了一种视频信号记录系统，用于根据由采样电路在记录纸上获得的像素信号记录图像图像。 根据本发明，可以通过简单的处理电路来获得并打印具有期望的各种尺寸的高质量图像图像而不改变点密度。
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