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公开(公告)号：US4727436A
公开(公告)日：1988-02-23
申请号：US946096
申请日：1986-12-23
CPC分类号： H04N1/40087
摘要： For reproducing a picture with a density gradient through printing, an overlapped region is provided in a high density dot reproduction range and a low density dot reproduction range. The switch-over between the high density dot at the overlapped region is conducted where the picture density sharply changes. This reduces the unfavorable perception of quality differences in a printed picture resulting from the switch-over between the high and low density dots.
摘要翻译： 为了通过印刷再现具有密度梯度的图像，以高密度点再现范围和低密度点再现范围提供重叠区域。 在重叠区域的高密度点之间进行切换，图像密度急剧变化。 这降低了由高密度点和低密度点之间的切换导致的打印图像中的质量差异的不利感觉。
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公开(公告)号：US4604654A
公开(公告)日：1986-08-05
申请号：US758851
申请日：1985-07-26
CPC分类号： H04N1/034 , B41J2/2125 , H04N1/40031 , H04N1/40087 , B41J2202/11
摘要： An image forming method comprises the steps of providing pattern elementary marks which provide an image pattern, controlling the size of the pattern elementary marks, and forming the pattern elementary marks substantially at equal intervals. The controlling step is such that use is made preferentially of the pattern elementary marks in an area wherein the variation in density gradient level relative to the variation in size of the pattern elementary marks is great. An apparatus for carrying out such method is provided.
摘要翻译： 图像形成方法包括以下步骤：提供提供图像图案的图案基本标记，控制图案基本标记的尺寸，以及基本等间隔地形成图案基本标记。 控制步骤是优先使用相对于图案基本标记的尺寸变化的密度梯度水平的变化较大的区域中的图案基本标记的使用。 提供了一种用于执行这种方法的设备。
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公开(公告)号：US4713746A
公开(公告)日：1987-12-15
申请号：US946095
申请日：1986-12-23
CPC分类号： H04N1/40087 , H04N1/40025 , H04N1/506
摘要： A picture-forming method comprises the steps of providing picture forming elementary particles having different optical densities; controlling the areas occupied by the respective picture forming elementary particles; and representing gradient by said different picture forming elementary particles while limiting the percentage of the gradient level area represented by the highest density elementary particle to said picture forming elementary particles to under 70% of the total area repsesented by said respective different picture forming elementary particles, thereby giving a picture which does not feel "rough". Apparatus is also disclosed for performing the method.
摘要翻译： 图像形成方法包括提供具有不同光密度的图像形成基本粒子的步骤; 控制各图像形成基本粒子所占据的面积; 并且通过所述不同的图像形成基本粒子表示梯度，同时将由最高密度基本粒子表示的梯度水平面积的百分比限制到所述图像形成基本粒子，使得由所述各个不同的图像形成基本粒子代替的总面积的70％以下， 从而给出不感觉“粗糙”的图片。 还公开了用于执行该方法的装置。
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4.发明授权Picture producing apparatus using multiple dot forming units and recording materials of different concentrations 失效使用多个点形成单元和不同浓度的记录材料的图像制作装置
公开(公告)号：US4713701A
公开(公告)日：1987-12-15
申请号：US844244
申请日：1986-03-24
CPC分类号： H04N1/40087
摘要： A picture producing apparatus forms a picture comprising a plurality of picture elements with different light-reflecting properties providing different optical reflection densities using a plurality of dot forming units to provide dots of recording materials of different concentrations. The optical reflection density range of an entire original picture to be reproduced is determined and selecting circuitry responsive to that determination selects at least one of the dot forming units to form picture elements reproducing the original picture. The dot forming units vary the areas of the picture elements formed by the dots so as to represent in the reproduced picture the optical reflection density range of the original.
摘要翻译： 图像产生装置使用多个点形成单元形成包括具有不同光反射特性的多个图像元素的图像，从而提供不同浓度的记录材料的点。 确定要再现的整个原始图像的光学反射浓度范围，并且响应于该确定的选择电路选择至少一个点形成单元以形成再现原始图像的图像元素。 点形成单元改变由点形成的像素的面积，以便在再现的图像中表示原件的光学反射浓度范围。
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公开(公告)号：US4560997A
公开(公告)日：1985-12-24
申请号：US509059
申请日：1983-06-29
CPC分类号： B41J2/2056 , H04N1/40031 , H04N1/40087
摘要： Method and apparatus for forming a pattern in which an array duty factor of elementary pattern marks which are elements for forming a picture is no less than 0.5.
摘要翻译： 用于形成其中作为用于形成图像的要素的基本图案标记的阵列占空因数不小于0.5的图案的方法和装置。
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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：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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8.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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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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