公开(公告)号：US20100238316A1

公开(公告)日：2010-09-23

申请号：US12704291

申请日：2010-02-11

申请人： Ji-Hye KIM ,  Sung-Dae Cho ,  Min-Kyu Park ,  Hee-Chan Park ,  Jin-Ho Kim ,  Yun-Je Oh ,  Kyoung-Tae Kim ,  Choon-Woo Kim ,  Seul-Ki Jang

发明人： Ji-Hye KIM ,  Sung-Dae Cho ,  Min-Kyu Park ,  Hee-Chan Park ,  Jin-Ho Kim ,  Yun-Je Oh ,  Kyoung-Tae Kim ,  Choon-Woo Kim ,  Seul-Ki Jang

IPC分类号： H04N9/73 ,  G06K9/00

CPC分类号： H04N9/735

摘要： An image classification apparatus and method for Automatic White Balance (AWB) are provided. An input image is divided into blocks including pluralities of pixels. A hue value and a chroma value are calculated for each of the blocks. A color-changed block is detected by calculating, for each one of the blocks, differences between the hue and chroma values calculated for all blocks adjacent to the one of the blocks and the hue and chroma values calculated for the one of the blocks. A hue variance and a chroma variance are calculated for the entire input image if a number of the detected color-changed blocks is greater than or equal to a first threshold. The input image is determined as a non-monochromatic image, if the hue variance is greater than or equal to a second threshold or the chroma variance is greater than or equal to a third threshold.

摘要翻译： 提供了一种用于自动白平衡（AWB）的图像分类装置和方法。 输入图像被分成包括多个像素的块。 为每个块计算色调值和色度值。 通过针对每个块计算针对与该一个块相邻的所有块计算的色调和色度值之间的差异以及为该块中的一个块计算的色调和色度值来检测颜色变化块。 如果检测到的颜色变化块的数量大于或等于第一阈值，则针对整个输入图像计算色调方差和色度方差。 如果色调方差大于或等于第二阈值或色度方差大于或等于第三阈值，则输入图像被确定为非单色图像。

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：US20070019239A1

公开(公告)日：2007-01-25

申请号：US11277567

申请日：2006-03-27

申请人： Hae-kee LEE ,  Goo-soo GAHANG ,  Byong-min KANG ,  Choon-woo KIM

发明人： Hae-kee LEE ,  Goo-soo GAHANG ,  Byong-min KANG ,  Choon-woo KIM

IPC分类号： H04N1/405

CPC分类号： H04N1/4092

摘要： A color halftone screen generating method and a system thereof. The color halftone screen generating method includes determining a dot center of each of a plurality of channels arbitrarily, selecting a predetermined number of applicants in a sequence in which cost values are small for each channel by performing a mask operation for each channel, overlapping the determined dot centers of the channels and computing an overlap cost value using an overlap filter, and output selecting an applicant closest to a position having a minimum overlap cost value among overlap cost values of the applicants. The color halftone screen generating method and system can reduce a pattern of low frequency characteristics generated due to overlapping of color channels and improve quality of a binary output image by uniformly distributing overlapped cluster dots.

摘要翻译： 一种彩色半色调画面生成方法及其系统。 彩色半色调屏幕生成方法包括任意地确定多个通道中的每个通道的点中心，通过对每个通道执行掩码操作，选择预定数量的申请人，其中每个通道的成本值较小的顺序，与确定的 并且使用重叠过滤器计算重叠成本值，并且输出选择最接近申请人的重叠成本值中具有最小重叠成本值的位置的申请者。 彩色半屏幕生成方法和系统可以减少由于颜色通道的重叠而产生的低频特性的图案，并通过均匀分布重叠的聚类点来提高二进制输出图像的质量。

公开(公告)号：US06614556B1

公开(公告)日：2003-09-02

申请号：US09444823

申请日：1999-11-22

申请人： Doo-Eui Hong ,  Choon-Woo Kim ,  Gyung-Nam Boo

发明人： Doo-Eui Hong ,  Choon-Woo Kim ,  Gyung-Nam Boo

IPC分类号： H04N1405

CPC分类号： H04N1/4053

摘要： A threshold modulation method, includes the steps of: a) determining whether an input pixel value is greater than a threshold of a current input pixel from the original digital image; b) determining whether an output image value is a predetermined high level or low level based on the threshold; c) if the input pixel value is greater than the threshold and the output image value is the predetermined high level, modulating the threshold of the adjacent pixel; d) if the input pixel value is greater than the threshold and the output image value is the predetermined low level, modulating the threshold of the adjacent pixel; e) if the input pixel value is not greater than the threshold and the output image value is the predetermined low level, modulating the threshold of the adjacent pixel; and f) if the input pixel value is not greater than the threshold and the output image value is the predetermined high level, modulating the threshold of the adjacent pixel.

摘要翻译： 阈值调制方法包括以下步骤：a）确定输入像素值是否大于来自原始数字图像的当前输入像素的阈值; b）基于所述阈值确定输出图像值是否是预定的高电平或低电平; c）如果输入像素值大于阈值并且输出图像值是预定高电平，则调制相邻像素的阈值; d）如果输入像素值大于阈值并且输出图像值是预定的低电平，则调制相邻像素的阈值; e）如果输入像素值不大于阈值，并且输出图像值是预定的低电平，则调制相邻像素的阈值; 以及f）如果所述输入像素值不大于所述阈值并且所述输出图像值是所述预定高电平，则调制相邻像素的阈值。

公开(公告)号：US08704910B2

公开(公告)日：2014-04-22

申请号：US12704291

申请日：2010-02-11

申请人： Ji-Hye Kim ,  Sung-Dae Cho ,  Min-Kyu Park ,  Hee-Chan Park ,  Jin-Ho Kim ,  Yun-Je Oh ,  Kyoung-Tae Kim ,  Choon-Woo Kim ,  Seul-Ki Jang

发明人： Ji-Hye Kim ,  Sung-Dae Cho ,  Min-Kyu Park ,  Hee-Chan Park ,  Jin-Ho Kim ,  Yun-Je Oh ,  Kyoung-Tae Kim ,  Choon-Woo Kim ,  Seul-Ki Jang

IPC分类号： H04N9/73 ,  G06K9/00

CPC分类号： H04N9/735

摘要： An image classification apparatus and method for Automatic White Balance (AWB) are provided. An input image is divided into blocks including pluralities of pixels. A hue value and a chroma value are calculated for each of the blocks. A color-changed block is detected by calculating, for each one of the blocks, differences between the hue and chroma values calculated for all blocks adjacent to the one of the blocks and the hue and chroma values calculated for the one of the blocks. A hue variance and a chroma variance are calculated for the entire input image if a number of the detected color-changed blocks is greater than or equal to a first threshold. The input image is determined as a non-monochromatic image, if the hue variance is greater than or equal to a second threshold or the chroma variance is greater than or equal to a third threshold.

摘要翻译： 提供了一种用于自动白平衡（AWB）的图像分类装置和方法。 输入图像被分成包括多个像素的块。 为每个块计算色调值和色度值。 通过针对每个块计算针对与该一个块相邻的所有块计算的色调和色度值之间的差异以及为该块中的一个块计算的色调和色度值来检测颜色变化块。 如果检测到的颜色变化块的数量大于或等于第一阈值，则针对整个输入图像计算色调方差和色度方差。 如果色调方差大于或等于第二阈值或色度方差大于或等于第三阈值，则输入图像被确定为非单色图像。

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。

公开(公告)号：US20070024914A1

公开(公告)日：2007-02-01

申请号：US11488646

申请日：2006-07-19

申请人： Woo-Jun Chung ,  Choon-Woo Kim ,  Byong-Min Kang

发明人： Woo-Jun Chung ,  Choon-Woo Kim ,  Byong-Min Kang

IPC分类号： H04N1/409

CPC分类号： H04N1/4055

摘要： A screen designing method and a screen designing device for reducing a moire pattern are provided. In the screen designing method, screen parameters corresponding to a preset screen frequency, a preset screen angle, and a preset resolution are detected first. Then, the coordinates of dot centers being the centers of cluster dots each with a plurality of microdots are detected. Next, a dot center order indicating a sequence in which the dot centers are turned on is determined. Thereafter, a microdot order indicating a sequence in which the microdots are turned on is determined using an evaluation function that quantitates the perception of a moiré pattern by a human's vision. Accordingly, the microdot order is determined using the evaluation function based on the visual characteristics of a human, thereby preventing patterns that degrade the quality of image formation and a moiré pattern from being generated.

摘要翻译： 提供了一种用于减少莫尔图案的屏幕设计方法和屏幕设计装置。 在屏幕设计方法中，首先检测对应于预设屏幕频率，预设屏幕角度和预设分辨率的屏幕参数。 然后，检测作为具有多个微点的簇点的中心的点中心坐标。 接下来，确定指示点中心打开的顺序的点中心顺序。 此后，使用评价功能确定表示微点开启的序列的微点次序，该评价函数通过人的视觉量化莫尔图案的感知。 因此，使用基于人的视觉特性的评价函数来确定微点次序，从而防止降低图像形成质量和产生莫尔图案的图案。

公开(公告)号：US20070019240A1

公开(公告)日：2007-01-25

申请号：US11390252

申请日：2006-03-28

申请人： Hae-kee Lee ,  Goo-soo Gahang ,  Byung-min Kang ,  Choon-woo Kim

发明人： Hae-kee Lee ,  Goo-soo Gahang ,  Byung-min Kang ,  Choon-woo Kim

IPC分类号： H04N1/405

CPC分类号： H04N1/4055

摘要： A halftone screen generating method includes growing dot centers into uniform binary patterns in an input image, calculating a main distance of each dot center, forming a screen filter by using the main distance, and generating the halftone screen by using the screen filter to form a binary image. The halftone screen generating method controls cluster dots to have a predetermined main distance, and improve a printing quality by growing dot centers uniformly.

摘要翻译： 半色调画面生成方法包括：将点中心成长为输入图像中的均匀二进制图案，计算每个点中心的主距离，通过使用主距离形成屏幕过滤器，并通过使用屏幕过滤器生成网版画面，以形成 二进制图像。 半色调画面生成方法将聚类点控制为具有预定的主要距离，并且通过均匀生长点中心来提高打印质量。

公开(公告)号：US20060290988A1

公开(公告)日：2006-12-28

申请号：US11433669

申请日：2006-05-15

申请人： Sang-ho Kim ,  Byong-min Kang ,  Choon-woo Kim ,  Seul-ki Jang

发明人： Sang-ho Kim ,  Byong-min Kang ,  Choon-woo Kim ,  Seul-ki Jang

IPC分类号： H04N1/405

CPC分类号： H04N1/52 ,  H04N1/4058

摘要： A method of setting frequency rate and angle differences between screens where moire patterns are not generated is provided. The method of setting the frequency rate and angle differences of the screens includes forming a binary image using at least two overlapped screens, and low-pass filtering the binary image to calculate an average reflectivity. A frequency component (cost) is calculated with respect to the binary image using the calculated average reflectivity. It is determined whether a moire pattern with respect to the binary image is generated based on the frequency component. Accordingly, the binary image where the moire pattern is not generated may be formed.

摘要翻译： 提供了一种设置不产生莫尔图案的屏幕之间的频率和角度差异的方法。 设置屏幕的频率和角度差的方法包括使用至少两个重叠屏幕形成二进制图像，并对二进制图像进行低通滤波以计算平均反射率。 使用计算出的平均反射率来计算相对于二值图像的频率分量（成本）。 基于频率分量确定是否生成相对于二进制图像的莫尔图案。 因此，可以形成不产生莫尔图案的二值图像。