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公开(公告)号：EP0334518A3
公开(公告)日：1991-01-09
申请号：EP89302411.7
申请日：1989-03-10
CPC分类号： G03G13/013 , H04N1/29 , H04N1/40037 , H04N1/506
摘要： In an image forming apparatus for forming an ordinary copy or a tonality image for an original image for a printing press, original image data is divided into a predetermined area, and pixel density within the area is subjected to a density conversion in accordance with screen half-toning information which will increase density information toward the approximate center of these pixels, by way of example. The original image data or the density-converted image data is converted into a binary-coded signal conforming to the density, and an output image is formed in accordance therewith. Preferably, plural types of non-linear correction tables are provided and a tone-conversion is performed selecting a correction table for every pixel or every line of the density-converted image data. Preferably, the original image data is binary coded by a pattern signal having a long period, and the density-converted image data is binary coded by a pattern signal having a short period. The foregoing is applied to color-separated image data of each color. Preferably, the image data is divided, in accordance with color, into predetermined areas having the same or a different number of pixels, or into predetermined areas having a planar phase which differs for each color, and a screen angle is applied thereto.
摘要翻译： 在用于为印刷机的原始图像形成普通副本或色调图像的图像形成设备中，原始图像数据被分成预定区域，并且该区域内的像素密度根据屏幕一半进行密度转换 作为例子，这些信息将增加密度信息朝向这些像素的近似中心。 原始图像数据或密度转换图像数据被转换成符合密度的二进制编码信号，并据此形成输出图像。 优选地，提供多种类型的非线性校正表，并且对于密度转换图像数据的每个像素或每行选择校正表来执行色调转换。 优选地，通过具有长周期的图案信号对原始图像数据进行二进制编码，并且通过具有短周期的图案信号对密度转换后的图像数据进行二进制编码。 前述内容应用于每种颜色的颜色分离的图像数据。 优选地，根据颜色将图像数据划分成具有相同或不同数目的像素的预定区域或划分成具有对于每种颜色不同的平面相位的预定区域，并且将屏幕角度应用于其上。
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公开(公告)号：EP0342936A2
公开(公告)日：1989-11-23
申请号：EP89304952.8
申请日：1989-05-16
发明人： Hirose, Yoshihiko , Arai, Hitoshi
CPC分类号： H04N3/08 , G02B26/128 , G02B27/0031 , H04N1/036 , H04N1/1135
摘要： A scanning optical apparatus according to the present invention comprises a light source (2), a modulator (1) for modulating a light flux emitted from the light source (2), an image forming device (6a, 6b, 6c) for forming an image of the light flux from the light source to a predetermined position, a deflector (5) for deflecting the light flux from the light source in a predetermined position, a photosensitive device (8) for sensing the light flux deflected by the deflector (5), an adjusting device (10) for adjusting an image forming position of the light flux by the image forming device (6a, 6b, 6c) in correspondence to a signal obtained by the photosensitive device (8) and an inhibiting device (11) for inhibiting the operation of the adjusting device (10) when the light flux emitted from the light source (2) is being modulated by the modulator (1) in correspondence to a predetermined signal. By the scanning optical apparatus of the invention, the focal deviation can be always stably corrected and a stable image with high density can be obtained.
摘要翻译： 根据本发明的扫描光学设备包括：光源（2）;调制器（1），用于调制从光源（2）发射的光通量;图像形成装置（6a，6b，6c），用于形成 （5），其用于将来自光源的光通量偏转到预定位置;光敏器件（8），其用于感测由偏转器（5）偏转的光通量 ），调整装置（10），用于根据由光敏装置（8）和禁止装置（11）获得的信号调整图像形成装置（6a，6b，6c）的光通量的图像形成位置; 用于当从光源（2）发射的光通量正被调制器（1）调制时，对应于预定信号来禁止调节装置（10）的操作。 通过本发明的扫描光学装置，可以始终稳定地校正焦点偏移，并且可以获得高密度的稳定图像。
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公开(公告)号：EP0334518A2
公开(公告)日：1989-09-27
申请号：EP89302411.7
申请日：1989-03-10
CPC分类号： G03G13/013 , H04N1/29 , H04N1/40037 , H04N1/506
摘要： In an image forming apparatus for forming an ordinary copy or a tonality image for an original image for a printing press, original image data is divided into a predetermined area, and pixel density within the area is subjected to a density conversion in accordance with screen half-toning information which will increase density information toward the approximate center of these pixels, by way of example. The original image data or the density-converted image data is converted into a binary-coded signal conforming to the density, and an output image is formed in accordance therewith. Preferably, plural types of non-linear correction tables are provided and a tone-conversion is performed selecting a correction table for every pixel or every line of the density-converted image data. Preferably, the original image data is binary coded by a pattern signal having a long period, and the density-converted image data is binary coded by a pattern signal having a short period. The foregoing is applied to color-separated image data of each color. Preferably, the image data is divided, in accordance with color, into predetermined areas having the same or a different number of pixels, or into predetermined areas having a planar phase which differs for each color, and a screen angle is applied thereto.
摘要翻译： 在用于形成用于印刷机的原始图像的普通复印件或调色剂图像的图像形成装置中，原始图像数据被划分为预定区域，并且该区域内的像素密度根据屏幕半部进行密度转换 将通过示例的方式将密度信息增加到这些像素的近似中心的等级信息。 原始图像数据或密度转换图像数据被转换为符合密度的二进制编码信号，并且根据其形成输出图像。 优选地，提供多种类型的非线性校正表，并且对密度转换图像数据的每个像素或每一行选择校正表进行色调转换。 优选地，原始图像数据由具有长周期的图案信号进行二进制编码，并且通过具有短周期的图案信号对密度转换的图像数据进行二进制编码。 上述内容适用于每种颜色的分色图像数据。 优选地，图像数据根据颜色被划分为具有相同或不同数量像素的预定区域，或者划分成具有对于每种颜色不同的平面相位的预定区域，并且对其施加屏幕角度。
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公开(公告)号：EP0342936B1
公开(公告)日：1994-03-09
申请号：EP89304952.8
申请日：1989-05-16
发明人： Hirose, Yoshihiko , Arai, Hitoshi
CPC分类号： H04N3/08 , G02B26/128 , G02B27/0031 , H04N1/036 , H04N1/1135
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公开(公告)号：EP0213949B1
公开(公告)日：1992-10-28
申请号：EP86306710.4
申请日：1986-08-29
发明人： Arai, Hitoshi
CPC分类号： H04N1/3871
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公开(公告)号：EP0332468A2
公开(公告)日：1989-09-13
申请号：EP89302410.9
申请日：1989-03-10
CPC分类号： G03G13/013 , H04N1/29 , H04N1/40037 , H04N1/506
摘要： In an image forming apparatus for forming an ordinary copy or a tonality image for an original image for a printing master, original image data is divided into a predetermined area, and pixel density within the area is subjected to a density conversion in accordance with screen half-toning information which will increase density information toward the approximate center of these pixels, by way of example. The original image data or the density-converted image data is converted into a binary-coded signal conforming to the density, and an output image is formed in accordance therewith. Preferably, a specific mark is supperimposed on the output image.
摘要翻译： 在用于形成打印主文件的原始图像的普通复印件或色调图像的图像形成设备中，将原始图像数据划分为预定区域，并且该区域内的像素密度根据屏幕一半进行密度转换 作为例子，这些信息将增加密度信息朝向这些像素的近似中心。 原始图像数据或密度转换图像数据被转换成符合密度的二进制编码信号，并据此形成输出图像。 优选地，特定标记被叠加在输出图像上。
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公开(公告)号：EP0213949A2
公开(公告)日：1987-03-11
申请号：EP86306710.4
申请日：1986-08-29
发明人： Arai, Hitoshi
CPC分类号： H04N1/3871
摘要： An image processing apparatus has a semiconductor laser (14) for modulating a light beam (24), a beam detector (5) for detecting the beam, a selector (12) for selecting an output from a digital data input unit (10) or a black signal generator circuit (11), a comparator (14) for pulse-width modulating an output from the selector received through a D/A converter (13), and a signal generator circuit (21) for generating a video enable signal for switching the selector. The black signals are applied through the D/A converter and PWM comparator (14), rather than through an insertion circuit after the comparator, in order to avoid signal degradation caused by such an insertion circuit.
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公开(公告)号：EP0332468A3
公开(公告)日：1991-01-09
申请号：EP89302410.9
申请日：1989-03-10
CPC分类号： G03G13/013 , H04N1/29 , H04N1/40037 , H04N1/506
摘要： In an image forming apparatus for forming an ordinary copy or a tonality image for an original image for a printing master, original image data is divided into a predetermined area, and pixel density within the area is subjected to a density conversion in accordance with screen half-toning information which will increase density information toward the approximate center of these pixels, by way of example. The original image data or the density-converted image data is converted into a binary-coded signal conforming to the density, and an output image is formed in accordance therewith. Preferably, a specific mark is supperimposed on the output image.
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公开(公告)号：EP0334518B1
公开(公告)日：1997-10-15
申请号：EP89302411.7
申请日：1989-03-10
CPC分类号： G03G13/013 , H04N1/29 , H04N1/40037 , H04N1/506
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公开(公告)号：EP0332468B1
公开(公告)日：1994-06-08
申请号：EP89302410.9
申请日：1989-03-10
CPC分类号： G03G13/013 , H04N1/29 , H04N1/40037 , H04N1/506
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