公开(公告)号：US4975786A

公开(公告)日：1990-12-04

申请号：US289017

申请日：1988-12-23

申请人： Akihiro Katayama ,  Hidefumi Ohsawa ,  Shinichi Ishida ,  Masahiro Sakamoto ,  Yasuyuki Shinada

发明人： Akihiro Katayama ,  Hidefumi Ohsawa ,  Shinichi Ishida ,  Masahiro Sakamoto ,  Yasuyuki Shinada

IPC分类号： H04N1/405

CPC分类号： H04N1/4052

摘要： An image processing apparatus such as a digital printer or digital facsimile apparatus for half tone processing input image data has: an input device to input image data indicative of a concentration of an image; a discriminating circuit to discriminate whether the input image data is smaller than a threshold value or not; a binarizing circuit to binarize the input image data into binary data of high and low levels; and a setting circuit to set the binary output of the image data to the low (0) level irrespective of the result of the binarization by the binarizing circuit when the input image data is determined to be smaller than the threshold value. The input device includes a reading circuit to read the original image and a generator to generate image data indicative of the original image concentration. When the pixel concentration to be processed by an error diffusion method is smaller than the threshold value, the error data generated for that pixel is set to 0, with the result that particles-like noises in the high contrast portion are eliminated and the encoding efficiency in highlight portions is improved. Thus, a high quality image of excellent resolution and gradations can be transmitted at a high speed.

摘要翻译： 用于半色调处理输入图像数据的诸如数字打印机或数字传真装置的图像处理装置具有：输入指示图像浓度的图像数据的输入装置; 识别电路，用于识别输入图像数据是否小于阈值; 二进制化电路，将输入图像数据二值化为高，低电平的二进制数据; 以及设置电路，用于当输入图像数据被确定为小于阈值时，将图像数据的二进制输出设置为低（0）电平，而不考虑二值化电路的二值化结果。 输入装置包括读取原始图像的读取电路和发生器，以产生指示原始图像浓度的图像数据。 当通过误差扩散方法处理的像素浓度小于阈值时，为该像素生成的误差数据被设置为0，结果是高对比度部分中的颗粒状噪声被消除，并且编码效率 亮点部分得到改善。 因此，可以高速地传输优异的分辨率和灰度的高质量图像。

公开(公告)号：US4969052A

公开(公告)日：1990-11-06

申请号：US346906

申请日：1989-05-03

申请人： Shinichi Ishida ,  Masahiro Sakamoto ,  Yasuyuki Shinada ,  Takeshi Ono

发明人： Shinichi Ishida ,  Masahiro Sakamoto ,  Yasuyuki Shinada ,  Takeshi Ono

IPC分类号： H04N1/40 ,  H04N1/405

CPC分类号： H04N1/4057 ,  H04N1/40025

摘要： According to the present invention, when image data are subjected to quantization processing using an error diffusion method, the generation of a striped pattern which is a cause for deterioration of picture quality in the error diffusion method is prevented. In the present invention, an original image is read and image data are generated. The image data obtained by reading the original image are quantized using an error diffusion method, and the quantized image data can be output and recorded by a thermal-head printer.Furthermore, according to the present invention, an error between the density of an input image and the density of an output image after being subjected to a quantization processing using an error diffusion method is perfectly preserved. In an image processing appartus for performing a quantization by dispersing an error between input image data and output image data which arises when the input image data are quantized, to image data of surrounding picture elements, the error between the input image data and the output image data is computed otherwise determined, the error is subjected to a predetermined weighting processing, the error subjected to the weighting processing is dispersed to surrounding picture elements, and a surplus of the error generated in the weighting processing is corrected.

公开(公告)号：US20070103709A1

公开(公告)日：2007-05-10

申请号：US11438432

申请日：2006-05-23

申请人： Takashi Ono ,  Yasuyuki Shinada ,  Tatsuo Kimura ,  Yukio Nohata ,  Takashi Imai

发明人： Takashi Ono ,  Yasuyuki Shinada ,  Tatsuo Kimura ,  Yukio Nohata ,  Takashi Imai

IPC分类号： G06F3/12

CPC分类号： H04N1/00538 ,  H04N1/00204 ,  H04N1/00238 ,  H04N1/00347 ,  H04N2201/0024 ,  H04N2201/0046 ,  H04N2201/0074 ,  H04N2201/0082 ,  H04N2201/0093

摘要： An existing printer arranged to print data from a PC (personal computer) is used as the printer unit of a facsimile apparatus. The PC uses a printer driver dedicated to an existing printer (capable of performing the same processing as the printer unit of the facsimile apparatus) as a module, serving as application software for a facsimile-apparatus control unit, for printing the data from the PC. When printing data from the PC, a command uniquely directed to the facsimile apparatus is added to the printing data generated by the PC's printer driver, and the resultant data is transmitted to the facsimile apparatus. Upon receipt of the transmitted data, the facsimile apparatus removes the added command, thus restoring the printing data generated by the printer driver, and transmits the restored data to the printer unit to perform printing. It is thus possible to use the printer unit and the printer driver which utilize existing printers, and to cause the facsimile apparatus to wait in a state of receiving a common command system.

摘要翻译： 将用于从PC（个人计算机）打印数据的现有打印机用作传真设备的打印机单元。 PC使用专用于现有打印机的打印机驱动程序（能够执行与传真装置的打印机单元相同的处理）作为用于传真设备控制单元的应用软件的模块，用于从PC打印数据 。 当从PC打印数据时，向PC的打印机驱动程序生成的打印数据添加了唯一地指向传真设备的命令，并将所得到的数据传送到传真设备。 传真装置接收到传送的数据后，删除所添加的命令，从而恢复由打印机驱动程序生成的打印数据，并将恢复的数据发送到打印机单元进行打印。 因此，可以使用利用现有打印机的打印机单元和打印机驱动器，并且使得传真装置在接收公共命令系统的状态下等待。

公开(公告)号：US5179454A

公开(公告)日：1993-01-12

申请号：US873332

申请日：1992-04-17

申请人： Yasuyuki Shinada

发明人： Yasuyuki Shinada

IPC分类号： H04N1/00 ,  H04N1/401

CPC分类号： H04N1/00702 ,  H04N1/00681 ,  H04N1/0079 ,  H04N1/401 ,  H04N2201/0434

摘要： An image reading apparatus includes a carrying unit for carrying a sheet original and a book original to a reading position, an original urging member including a reference member, closed when a sheet original is carried by the carrying unit and opened when a book original is carried by the carrying member, a reading unit for reading an image of an original carried to the reading position and the reference member of the original urging member in a closed state, and a correcting unit for correcting nonuniformity of an image signal obtained by reading an original image on the basis of a reference signal obtained by reading the reference number. When the original urging member is open, the correcting unit corrects nonuniformity of an image signal on the basis of the reference signal used upon reading of a previous original image.

摘要翻译： 图像读取装置包括用于将片材原件和书本原件运送到读取位置的搬运单元，包括参考构件的原始推动构件，当由搬运单元承载片材原件时关闭，并且当载入书本时打开 通过所述承载构件，读取单元，用于在关闭状态下读取携带到所述读取位置的原稿的图像和所述原始推动构件的参考构件;以及校正单元，用于校正通过读取原稿而获得的图像信号的不均匀性 基于通过读取参考数字获得的参考信号的图像。 当初始推动构件打开时，校正单元基于在读取先前的原始图像时使用的参考信号来校正图像信号的不均匀性。

公开(公告)号：US5132710A

公开(公告)日：1992-07-21

申请号：US658236

申请日：1991-02-20

申请人： Seishi Ejiri ,  Yasuyuki Shinada

发明人： Seishi Ejiri ,  Yasuyuki Shinada

IPC分类号： H04N1/23 ,  B41J2/165

CPC分类号： B41J2/16579 ,  B41J2/1652 ,  B41J2/2146

摘要： A facsimile apparatus employs an ink jet printer in which the ink discharge recovery operation by idle ink discharge from all the discharge openings of the recording head is conducted at a suitable timing instructed by a central processing unit. The timing of the idle ink discharge is determined not by a timer interruption procedure, which imposes an additional burden on the processing capacity of the central processing unit, but from the image data receiving rate and the amount of actually received data. In this manner the central processing unit can provide increased processing capacity, and the control program can be simplified and made less expensive.