公开(公告)号：US08199363B2

公开(公告)日：2012-06-12

申请号：US11782091

申请日：2007-07-24

申请人： Woo-jun Chung ,  Sang-youn Shin ,  Choon-woo Kim ,  Byong-tae Ryu ,  Jong-ok Lee

发明人： Woo-jun Chung ,  Sang-youn Shin ,  Choon-woo Kim ,  Byong-tae Ryu ,  Jong-ok Lee

IPC分类号： G06K15/00 ,  G06K9/36 ,  H04N1/40

CPC分类号： H04N1/40075 ,  H04N1/40068

摘要： An image processing method and an image processing apparatus converts a binary image into a grayscale image by increasing the size and information quantity of the binary image. The image processing method includes generating a plurality of lookup tables having multiple gray level values assigned to a predetermined pattern of the binary image such that the gray level is retrieved from the plurality of lookup tables depending on the context of the block being processed. The binary image may be converted into the grayscale image by applying the gray value of one of the plurality of lookup tables that corresponds to the context, such as the frequency components of the binary image. With this configuration, since the size and information quantity of an image can be reduced for transmission, it is possible to prevent deterioration of image quality when the image is restored, while also printing at a higher speed.

摘要翻译： 图像处理方法和图像处理装置通过增加二值图像的大小和信息量将二进制图像转换成灰度图像。 图像处理方法包括生成具有分配给二进制图像的预定图案的多个灰度值的多个查找表，使得根据正被处理的块的上下文从多个查找表中检索灰度级。 可以通过应用与上下文相对应的多个查找表中的一个的灰度值，例如二进制图像的频率分量，将二进制图像转换成灰度图像。 利用这种配置，由于可以减小图像的尺寸和信息量以进行传输，所以可以防止当图像恢复时图像质量的劣化，同时也以更高的速度进行打印。

公开(公告)号：US20080117465A1

公开(公告)日：2008-05-22

申请号：US11782091

申请日：2007-07-24

申请人： Woo-jun Chung ,  Sang-youn Shin ,  Choon-woo Kim ,  Byong-tae Ryu ,  Jong-ok Lee

发明人： Woo-jun Chung ,  Sang-youn Shin ,  Choon-woo Kim ,  Byong-tae Ryu ,  Jong-ok Lee

IPC分类号： H04N1/405

CPC分类号： H04N1/40075 ,  H04N1/40068

摘要： An image processing method and an image processing apparatus converts a binary image into a grayscale image by increasing the size and information quantity of the binary image. The image processing method includes generating a plurality of lookup tables having multiple gray level values assigned to a predetermined pattern of the binary image such that the gray level is retrieved from the plurality of lookup tables depending on the context of the block being processed. The binary image may be converted into the grayscale image by applying the gray value of one of the plurality of lookup tables that corresponds to the context, such as the frequency components of the binary image. With this configuration, since the size and information quantity of an image can be reduced for transmission, it is possible to prevent deterioration of image quality when the image is restored, while also printing at a higher speed.

摘要翻译： 图像处理方法和图像处理装置通过增加二值图像的大小和信息量将二进制图像转换成灰度图像。 图像处理方法包括生成具有分配给二进制图像的预定图案的多个灰度值的多个查找表，使得根据正被处理的块的上下文从多个查找表中检索灰度级。 可以通过应用与上下文相对应的多个查找表中的一个的灰度值，例如二进制图像的频率分量，将二进制图像转换成灰度图像。 利用这种配置，由于可以减小图像的尺寸和信息量以进行传输，所以可以防止当图像恢复时图像质量的劣化，同时也以更高的速度进行打印。

公开(公告)号：US20080239335A1

公开(公告)日：2008-10-02

申请号：US11850894

申请日：2007-09-06

申请人： Ho-keun LEE ,  Sang-ho Kim ,  Choon-woo Kim ,  Byong-tae Ryu ,  Jong-ok Lee

发明人： Ho-keun LEE ,  Sang-ho Kim ,  Choon-woo Kim ,  Byong-tae Ryu ,  Jong-ok Lee

IPC分类号： G06K15/00

CPC分类号： H04N19/14 ,  H04N19/176 ,  H04N19/90

摘要： A print system having an enhanced depth resolution of an image. The print system includes a host device to divide a gray image into basic block units, to determine whether the basic block units represent an edge area, to convert the gray image into binary data, and to output the converted gray image; and an image forming apparatus to determine whether the binary data received from the host device represents an edge area, to convert the binary data into a gray image according to the result of determination, and to print the gray image. As a result, depth resolution is enhanced, and print data transmission time is shortened.

摘要翻译： 具有增强的图像深度分辨率的打印系统。 打印系统包括：主机，用于将灰度图像划分为基本块单元，以确定基本块单元是否表示边缘区域，将灰度图像转换为二进制数据，并输出转换的灰度图像; 以及图像形成装置，用于确定从主机设备接收的二进制数据是否表示边缘区域，根据确定结果将二进制数据转换成灰度图像，并打印灰度图像。 结果，增强了深度分辨率，并且缩短了打印数据传输时间。

公开(公告)号：US20080100856A1

公开(公告)日：2008-05-01

申请号：US11767016

申请日：2007-06-22

申请人： Hae-kee Lee ,  Ho-keun Lee ,  Choon-woo Kim ,  Jong-ok Jee ,  Byong-tae Ryu

发明人： Hae-kee Lee ,  Ho-keun Lee ,  Choon-woo Kim ,  Jong-ok Jee ,  Byong-tae Ryu

IPC分类号： G06F15/00

CPC分类号： H04N1/4105

摘要： An image forming apparatus, including a halftone image converter to convert input image data having a plurality of bits per pixel into halftone image data having a binary pixel value corresponding to a bright pixel or a dark pixel, and a bit encoder to divide the halftone image data into blocks with a predetermined size, and to perform a bit-encoding operation by using the number of either the bright or dark pixels in the block to output encoded image data.

摘要翻译： 一种图像形成装置，包括半色调图像转换器，用于将具有每像素多个位的输入图像数据转换成具有对应于亮像素或暗像素的二进制像素值的半色调图像数据和用于分割半色调图像的位编码器 数据转换为具有预定大小的块，并且通过使用块中的亮或暗像素的数量来执行位编码操作，以输出编码图像数据。