公开(公告)号：US4663662A

公开(公告)日：1987-05-05

申请号：US556323

申请日：1983-11-30

申请人： Hidekazu Sekizawa ,  Kiyoshi Yamada ,  Shuzo Miura ,  Yasuo Hosaka

发明人： Hidekazu Sekizawa ,  Kiyoshi Yamada ,  Shuzo Miura ,  Yasuo Hosaka

IPC分类号： H04N1/40 ,  H04N1/405 ,  H04N1/52 ,  H04N1/60 ,  H04N1/46 ,  G03F3/08

CPC分类号： H04N1/6019 ,  H04N1/40062 ,  H04N1/4058 ,  H04N1/52 ,  H04N1/6016

摘要： A picture signal processing circuit for use in a picture reproducing apparatus, wherein a picture to be copied is optically scanned by a line image sensor to provide picture signals for each of the plural picture elements of the picture. A detector circuit is arranged to detect a local variation in the density of the picture based on a convolution operation on picture signals of a two-dimensional picture-element array to produce a local density variation detection signal which represents a high frequency component of the input signal. The picture-element array being detected is shifted by one picture element in a scanning direction during optical scanning of the picture. A signal processor circuit is responsive to the local density variation detection signal to switch between a simple binarization processing using single threshold data and a dithering binarization processing using dither matrix threshold data for the picture signal to be applied to a printer. With this arrangement, line pictures, character pictures or the like are reproduced with binary signals and continuous tone pictures are reproduced with dithered signals.

摘要翻译： 一种用于图像再现装置的图像信号处理电路，其中要被复制的图像由线图像传感器光学扫描，以为图像的多个图像元素中的每一个提供图像信号。 检测器电路被布置成基于对二维图像元素阵列的图像信号的卷积运算来检测图像的密度的局部变化，以产生表示输入的高频分量的局部浓度变化检测信号 信号。 正在检测的图像元素阵列在图像的光学扫描期间沿扫描方向偏移一个像素。 信号处理器电路响应于局部浓度变化检测信号，在使用单个阈值数据的简单二值化处理和使用抖动矩阵阈值数据的抖动二值化处理之间切换要应用于打印机的图像信号。 利用这种布置，用二进制信号再现线条图像，字符图像等，并且用抖动信号再现连续色调图像。

公开(公告)号：US07995249B2

公开(公告)日：2011-08-09

申请号：US12635409

申请日：2009-12-10

申请人： Hirokazu Shoda ,  Kunihiko Miura ,  Hidekazu Sekizawa

发明人： Hirokazu Shoda ,  Kunihiko Miura ,  Hidekazu Sekizawa

IPC分类号： H04N1/04

CPC分类号： H04N1/40062 ,  H04N1/40068

摘要： An image forming apparatus according to an embodiment of the invention reads an original by mechanically moving an axial light source in a subscanning direction perpendicular to the axis. The image forming apparatus includes: a sensor whose resolution in a main scanning direction parallel to the axis of the axial light source is higher than a designated resolution; a controller that controls the driving speed of the axial light source so that the resolution in the subscanning direction is higher than the designated resolution; an original-image-data generating unit that generates original image data with a resolution higher than the designated resolution in response to the output from the sensor; and an image reducing unit that generates reduced pixels fewer than a specified number of pixels in the original image data to generate a reduced image with a resolution equal to the designated resolution.

摘要翻译： 根据本发明的实施例的图像形成装置通过在垂直于轴的副扫描方向上机械地移动轴向光源来读取原稿。 图像形成装置包括：传感器，其在与主轴扫描方向平行的主扫描方向的分辨率高于指定分辨率; 控制器，其控制轴向光源的驱动速度，使得副扫描方向上的分辨率高于指定分辨率; 原始图像数据生成单元，响应于来自传感器的输出而生成分辨率高于指定分辨率的原始图像数据; 以及图像缩小单元，其生成少于原始图像数据中的指定数量的像素的缩小像素，以生成具有等于指定分辨率的分辨率的缩小图像。

公开(公告)号：US20090323095A1

公开(公告)日：2009-12-31

申请号：US12164712

申请日：2008-06-30

申请人： Koji TANIMOTO ,  Kunihiko Miura ,  Hidekazu Sekizawa ,  Jun Sakakibara ,  Koji Kawai ,  Hirokazu Shoda ,  Naoyuki Misaka

发明人： Koji TANIMOTO ,  Kunihiko Miura ,  Hidekazu Sekizawa ,  Jun Sakakibara ,  Koji Kawai ,  Hirokazu Shoda ,  Naoyuki Misaka

IPC分类号： G06F3/12

CPC分类号： H04N1/3871 ,  H04N1/486 ,  H04N2201/0094

摘要： A method and apparatus of forming an image includes reading an original with a first resolution. An original is read with a second resolution which is different from said first resolution. The image information read with the first resolution and the second resolution is converted into image information of a third resolution for image forming. An image is formed with the third resolution based on the image information converted by the conversion.

摘要翻译： 形成图像的方法和设备包括以第一分辨率读取原稿。 以与所述第一分辨率不同的第二分辨率读取原稿。 用第一分辨率和第二分辨率读取的图像信息被转换成用于图像形成的第三分辨率的图像信息。 基于通过转换转换的图像信息，以第三分辨率形成图像。

公开(公告)号：US5708514A

公开(公告)日：1998-01-13

申请号：US521323

申请日：1995-08-30

申请人： Kazuhiko Higuchi ,  Hidekazu Sekizawa ,  Naofumi Yamamoto ,  Haruko Kawakami ,  Eiichi Sakaue

发明人： Kazuhiko Higuchi ,  Hidekazu Sekizawa ,  Naofumi Yamamoto ,  Haruko Kawakami ,  Eiichi Sakaue

IPC分类号： H04N1/405 ,  H04N1/40 ,  H04N1/407

CPC分类号： H04N1/4056

摘要： An image recording apparatus according to the present invention is characterized by comprising first signal conversion section for converting a pixel density value of an current pixel of an input image signal into a first recording control signal for defining a recording amount, second signal conversion section for referring to an adjacent-pixel recording control signal for defining a recording amount of at least one adjacent pixel connected to the current pixel to convert the first recording control signal into a second recording control signal, being closest to the first recording control signal, for defining a recording amount at which pixel formation for the current pixel is stabilized, recording section for recording an image based on the second recording control signal, and error diffusion section for diffusing an error between the pixel density value and a recording density value of the second recording control signal to a pixel density value of each of non-processed pixels located around the current pixel.

摘要翻译： 根据本发明的图像记录装置的特征在于包括：第一信号转换部分，用于将输入图像信号的当前像素的像素密度值转换为用于定义记录量的第一记录控制信号;第二信号转换部分，用于参考 涉及用于定义连接到当前像素的至少一个相邻像素的记录量的相邻像素记录控制信号，以将第一记录控制信号转换为最接近第一记录控制信号的第二记录控制信号，用于定义 用于当前像素的像素形成的记录量稳定，用于基于第二记录控制信号记录图像的记录部分和用于扩散像素浓度值和第二记录控制的记录浓度值之间的误差的误差扩散部分 信号到每个非处理像素的像素密度值 围绕当前像素。

公开(公告)号：US5497180A

公开(公告)日：1996-03-05

申请号：US71000

申请日：1993-06-04

申请人： Haruko Kawakami ,  Hidekazu Sekizawa ,  Naofumi Yamamoto

发明人： Haruko Kawakami ,  Hidekazu Sekizawa ,  Naofumi Yamamoto

IPC分类号： B41J2/52 ,  B41J2/525 ,  H04N1/40 ,  H04N1/405 ,  H04N1/46 ,  H04N1/52 ,  H04N1/60 ,  H04N1/64 ,  H04N1/21

CPC分类号： H04N1/4052 ,  H04N1/52 ,  H04N1/644

摘要： An image recording apparatus comprises an unequal interval quatization circuit for quantizing at an unequal interval an input multilevel image signal to prevent at least one signal having a tone level at which a recording density is unstable from being outputted, a circuit for calculating a difference between an unequal-interval-quantized signal and the input image signal, a buffer memory for temporarily storing the difference, a multiplexer for multiplying a recorded signal with a weight coefficient, an adder for adding a resultant signal from the multiplier to the input image signal, and a printer for recording an image, using the quantized signal as a record signal.

摘要翻译： 一种图像记录装置，包括：不等间隔积分电路，用于以不等间隔量化输入多值图像信号，以防止至少一个具有记录密度不稳定的音调电平的信号被输出;电路，用于计算 不等间隔量化信号和输入图像信号，用于临时存储差的缓冲存储器，用于将记录信号与权重系数相乘的多路复用器，用于将来自乘法器的合成信号与输入图像信号相加的加法器，以及 用于记录图像的打印机，使用量化信号作为记录信号。

公开(公告)号：US5200840A

公开(公告)日：1993-04-06

申请号：US549435

申请日：1990-07-06

申请人： Yuzo Koike ,  Hidekazu Sekizawa ,  Naofumi Yamamoto

发明人： Yuzo Koike ,  Hidekazu Sekizawa ,  Naofumi Yamamoto

IPC分类号： G06T3/40

CPC分类号： G06T3/4007

摘要： An image processing apparatus comprises an image-area discriminating circuit for discriminating the attribute of an image, such as whether it is a character/line image or a dot image or whether or not it is an isolated point noise, and outputting a discrimination result, an enlargement/reduction processing circuit for performing enlargement/reduction processing on an image, and a filtering circuit for controlling the spatial frequency response of an image in accordance of a discrimination signal.

公开(公告)号：US20080180514A1

公开(公告)日：2008-07-31

申请号：US11669306

申请日：2007-01-31

申请人： Hidekazu Sekizawa ,  Naoyuki Misaka ,  Jun Sakakibara

发明人： Hidekazu Sekizawa ,  Naoyuki Misaka ,  Jun Sakakibara

IPC分类号： B41J2/47

CPC分类号： G03G15/043 ,  G03G15/5025 ,  G03G2215/00177

摘要： An image forming apparatus applies a shading correction to an image read from a white reference board 18, and determines presence or absence of stripe-like noise in the image read therefrom after applying the shading correction. The apparatus exposes an area at which there is no noise in the white reference board 18 to create a white reference value for a shading correction for reading a document after that time.

摘要翻译： 图像形成装置对从白参考板18读取的图像应用阴影校正，并且在应用阴影校正之后，确定在其中读取的图像中是否存在条状噪声。 该设备在白色参考板18中露出没有噪声的区域，以创建用于在该时间之后读取文档的阴影校正的白色参考值。

公开(公告)号：US5072291A

公开(公告)日：1991-12-10

申请号：US636007

申请日：1991-01-03

申请人： Hidekazu Sekizawa

发明人： Hidekazu Sekizawa

IPC分类号： H04N1/40 ,  H04N1/403 ,  H04N1/405 ,  H04N1/58

CPC分类号： H04N1/58 ,  H04N1/40062 ,  H04N1/4051

摘要： In an image display system, a picture quality improving circuit is provided for comparing a distribution, in a pixel array of a specified size, of image characteristic signals derived from image information signals each indicating one pixel of the input image with a previously examined distribution of image characteristic signals corresponding to each type of image, to thereby discriminate the type of input image. Further, a binary encoding/dithering selecting circuit responsive to the decision made on the picture type by the image quality improving circuit is provided to binary encode the image information signal applied to the image information output device on the basis of a fixed threshold value, or to dither the image information signal on the basis of variable threshold values, in accordance with the discriminated type of input image. Image information signals corresponding to a character/line image are binary encoded by the fixed threshold value, and the image information signals corresponding to a halftone image or a continuous-tone picture are dithered.

摘要翻译： 在图像显示系统中，提供了一种图像质量改善电路，用于将从指定输入图像的一个像素的每个图像信息信号导出的图像特征信号的预定分布 对应于每种类型的图像的图像特征信号，从而区分输入图像的类型。 此外，提供响应于由图像质量改善电路对图像类型做出的决定的二进制编码/抖动选择电路，以基于固定阈值对施加到图像信息输出装置的图像信息信号进行二进制编码，或 根据输入图像的识别类型，根据可变阈值对图像信息信号进行抖动。 对应于字符/行图像的图像信息信号由固定阈值进行二进制编码，并且对应于半色调图像或连续色调图像的图像信息信号被抖动。

公开(公告)号：US5028991A

公开(公告)日：1991-07-02

申请号：US400925

申请日：1989-08-30

申请人： Hidekazu Sekizawa ,  Akito Iwamoto ,  Shuzo Hirahara ,  Naofumi Yamamoto ,  Tutomu Saito ,  Kazuhiko Higuchi ,  Yuzo Koike

发明人： Hidekazu Sekizawa ,  Akito Iwamoto ,  Shuzo Hirahara ,  Naofumi Yamamoto ,  Tutomu Saito ,  Kazuhiko Higuchi ,  Yuzo Koike

IPC分类号： B41J2/485 ,  G06F17/30 ,  G06T1/00 ,  G06T11/60 ,  H04N1/387 ,  H04N1/58

CPC分类号： H04N1/58 ,  H04N1/3872

摘要： A color multi-function type copying machine is disclosed which includes an image input unit for optically sensing an input image and generating an image signal. A function memory stores an ink color used in a color frame to be written in the input image in order to designate its partial image region and a specific image edit function assigned to the ink color and desired to be executed by an operator so that the ink color and the specific image edit function can be rewritten. When a closed loop-like color frame of a selected color is written in the input image, a color frame region detecting unit detects a shape and a color of the color frame. In response to the detection result, the memory is accessed to determine an image edit function corresponding to a first selected ink color of the detected color frame. A color edit unit executes one or a plurality of image signal processing corresponding to the determined image edit function for the input image signal. The edited image signal is supplied to a color printing unit via a signal processing unit and is reproduced therein.

公开(公告)号：US4926251A

公开(公告)日：1990-05-15

申请号：US178431

申请日：1988-04-06

申请人： Hidekazu Sekizawa ,  Tutomu Saito ,  Naofumi Yamamoto ,  Kazuhiko Higuchi ,  Haruko Kawakami

发明人： Hidekazu Sekizawa ,  Tutomu Saito ,  Naofumi Yamamoto ,  Kazuhiko Higuchi ,  Haruko Kawakami

IPC分类号： H04N1/195 ,  H04N1/40 ,  H04N1/401 ,  H04N1/56 ,  H04N1/60

CPC分类号： H04N1/19515 ,  H04N1/19505 ,  H04N1/40062 ,  H04N1/401 ,  H04N1/56 ,  H04N1/6025

摘要： A color copying machine has a scanning-type proximity linear image sensor unit for optically scanning an input image and producing an image read signal, and a color printer unit for producing a copy image corresponding to the input image at limited levels of printing density. An image type discrimination circuit receives the image read signal, and at least partially discriminates the type of image based on a pattern matching technique, thereby producing a discrimination signal for specifying the image type in a pixel region of a predetermined size of the input image. An adaptive signal processing circuit also receives the image read signal, and performs different image signal correction processing in accordance with the discriminated image type, thus producing a corrected image signal, which is supplied to a multi-value dithering processor. The multi-value dithering processing circuit performs multi-value dither processing of the corrected image signal, and produces a printer drive signal for defining a printing pixel pattern for each pixel of the input image.

摘要翻译： 彩色复印机具有用于光学扫描输入图像并产生图像读取信号的扫描型邻近线性图像传感器单元，以及彩色打印机单元，用于以有限的打印浓度水平产生与输入图像相对应的复印图像。 图像类型识别电路接收图像读取信号，并且至少部分地基于模式匹配技术来区分图像的类型，由此产生用于指定输入图像的预定大小的像素区域中的图像类型的判别信号。 自适应信号处理电路还接收图像读取信号，并根据鉴别图像类型执行不同的图像信号校正处理，从而产生被提供给多值抖动处理器的校正图像信号。 多值抖动处理电路执行校正图像信号的多值抖动处理，并且产生用于为输入图像的每个像素定义打印像素图案的打印机驱动信号。