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1. 发明授权

US08199363B2 Image processing using hybrid lookup table 失效
标题翻译：使用混合查找表的图像处理
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。

2. 发明申请

US20080117465A1 IMAGE PROCESSING USING HYBRID LOOKUP TABLE 失效
标题翻译：使用混合查找表的图像处理
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。

3. 发明申请

US20050141037A1 Method and apparatus to enhance printing quality of laser printer 审中-公开
标题翻译：提高激光打印机打印质量的方法和装置
公开(公告)号：US20050141037A1
公开(公告)日：2005-06-30
申请号：US10981512
申请日：2004-11-05
申请人： Sang-youn Shin
发明人： Sang-youn Shin
IPC分类号： G06F3/12 , H04N1/405 , G06T5/00 , H04N1/409
CPC分类号： H04N1/4058
摘要： A method of and apparatus to enhance the printing quality of a laser printer, in which a window to define a binary image is generated using a plurality of Ipi values and angles of a dithering mask and the quality of a non-edge region is improved. The method of enhancing the printing quality of a laser printer using a 1-bit gray process includes: receiving a binary image, a dithering mask, and a plurality of values of Ipi and angles of the dithering mask, wherein Ipi indicates the number of lines per inch; generating a window having a size of N×N pixels considering the received values of Ipi and angles; determining whether a binary image of N×N pixels, which is defined by the window, is an edge region or not using the window and the dithering mask; and enhancing the quality of a binary image of N×N pixels determined to be a non-edge region. Using a plurality of Ipi values and angles of the dithering mask improves the quality of color images, which require several channels for printing.
摘要翻译：提高激光打印机的打印质量的方法和装置，其中使用多个Ipi值和抖动掩模的角度来产生定义二进制图像的窗口，并提高非边缘区域的质量。使用1位灰度处理来提高激光打印机的打印质量的方法包括：接收二进制图像，抖动掩码以及抖动掩模的Ipi和角度的多个值，其中Ipi表示行数每英寸考虑到Ipi和角度的接收值，生成具有N×N像素大小的窗口; 确定由窗口定义的N×N个像素的二进制图像是否是使用窗口和抖动掩模的边缘区域; 并且提高被确定为非边缘区域的N×N个像素的二值图像的质量。使用多个Ipi值和抖动掩模的角度提高了彩色图像的质量，这需要多个通道进行打印。

4. 发明申请

US20080309955A1 IMAGE FORMING APPARATUS AND METHOD TO IMPROVE IMAGE QUALITY THEREOF 审中-公开
标题翻译：图像形成装置和提高图像质量的方法
公开(公告)号：US20080309955A1
公开(公告)日：2008-12-18
申请号：US11970615
申请日：2008-01-08
申请人： Ho-keun LEE , Sang-youn Shin
发明人： Ho-keun LEE , Sang-youn Shin
IPC分类号： B41J2/21 , H04N1/46
CPC分类号： H04N1/4056
摘要： An image forming apparatus to improve image quality. The image forming apparatus includes a window control unit to generate a window of a predetermined size using a lines per inch (LPI) value of a dithering mask and an angle, and to detect locations of a center reference pixel and neighboring reference pixels in the window, a weighting set unit to apply weighted values to the reference pixels based on locations of the detected center reference pixel and the neighboring reference pixels, and a control unit to determine a dot size of the center reference pixel corresponding to weighted values corresponding to locations of black pixels of the center reference pixel and neighboring reference pixels. Accordingly, image quality is improved by generating dots corresponding to a plurality of gray levels based on weighted values.
摘要翻译：一种提高图像质量的图像形成装置。图像形成装置包括：窗口控制单元，用于使用抖动掩模的每英寸行（LPI）值和角度来生成预定尺寸的窗口，并且检测窗口中的中心参考像素和相邻参考像素的位置基于检测到的中心参考像素和相邻参考像素的位置将加权值应用于参考像素的加权设置单元，以及控制单元，用于确定对应于对应于位置的加权值的中心参考像素的点大小中心参考像素和相邻参考像素的黑色像素。因此，通过基于加权值产生与多个灰度级对应的点来提高图像质量。

5. 发明授权

US08054506B2 Image forming apparatus and image quality enhancement method thereof 有权
标题翻译：图像形成装置及其图像质量增强方法
公开(公告)号：US08054506B2
公开(公告)日：2011-11-08
申请号：US12023147
申请日：2008-01-31
申请人： Sang-youn Shin
发明人： Sang-youn Shin
IPC分类号： G06K15/00
CPC分类号： H04N1/4092 , H04N1/40075 , H04N1/405
摘要： An image forming apparatus provides enhancement of image quality. The image forming apparatus includes a window generating unit to generate a main window of a predetermined size using a Lines Per Inch (LPI) and an angle of a dithering mask, and to generate a plurality of subwindows within the generated main window, a determining unit to determine the presence of an edge area by applying the plurality of generated subwindows to a binary image and according to pixel values of the binary image that correspond to the subwindows, and a control unit to determine a dot size of a central reference pixel at the center of the main window, according to the presence and absence of the edge area. Because image quality is enhanced adaptively according to edge and smooth areas, print quality improves.
摘要翻译：图像形成装置提供图像质量的提高。图像形成装置包括：窗产生单元，用于使用每英寸行（LPI）和抖动掩模的角度来生成预定尺寸的主窗口，并且在所生成的主窗口内生成多个子窗口;确定单元通过将多个生成的子窗口应用于二进制图像并根据与子窗口相对应的二值图像的像素值来确定边缘区域的存在;以及控制单元，用于确定在该窗口中的中心参考像素的点大小中心的主窗口，根据有无边缘区域。因为图像质量根据边缘和平滑区域自适应增强，打印质量提高。

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