公开(公告)号：US20140132992A1

公开(公告)日：2014-05-15

申请号：US14128351

申请日：2012-05-18

申请人： Haifeng Li ,  Bin Yang

发明人： Haifeng Li ,  Bin Yang

IPC分类号： G06K15/02

CPC分类号： G06K15/1881 ,  H04N1/40087 ,  H04N1/4055

摘要： The present application discloses a method and an apparatus for generating multi-bit depth halftone amplitude-modulation dots. The method may comprise: scanning an input image to obtain a value of a current pixel Pxy, where x represents a lateral position index of the current pixel, and y represents a vertical position index of the current pixel; obtaining gj from a preset multi-bit depth threshold matrix G by starting with i=0, and determining if Pxy

摘要翻译： 本申请公开了一种用于产生多位深度半色调幅度调制点的方法和装置。 该方法可以包括：扫描输入图像以获得当前像素Pxy的值，其中x表示当前像素的横向位置索引，y表示当前像素的垂直位置索引; 通过以i = 0开始从预设的多位深度阈值矩阵G获得gj，并且确定Pxy

公开(公告)号：US08411310B2

公开(公告)日：2013-04-02

申请号：US12438533

申请日：2007-08-22

申请人： Bin Yang ,  Haifeng Li

发明人： Bin Yang ,  Haifeng Li

IPC分类号： G06K15/00

CPC分类号： H04N1/4052

摘要： Disclosed is a method for scanning and processing an image using the error diffusion screening technology, comprising: (1) scanning each pixel Mi of an nth line in an original image one by one and then storing a scanning result of the pixel Mi to an ith storage location; and (2) processing the stored result of the pixel Mi by using error diffusion and scanning pixels of an n+1th line in the original image until all pixels of the nth line have been processed and all pixels in the n+1th line have been scanned and stored, wherein once processing for the pixel Mi is completed, a scanning result of a pixel of the n+1th line is stored to the ith storage location previously occupied by the pixel Mi. Based on the method, the capacity for storing is only required to be able to store the data of one line in an image in the scanning direction, which saves the storage for bidirectional scanning. The method can optimize the hardware used to implement error diffusion and improve the operating efficiency. Also disclosed is a system for achieving the method.

摘要翻译： 公开了一种使用误差扩散筛选技术对图像进行扫描和处理的方法，包括：（1）逐个扫描原始图像中的第n行的每个像素Mi，然后将像素Mi的扫描结果存储到第i个 存储位置; 和（2）通过使用原始图像中的第n + 1行的误差扩散和扫描像素来处理像素Mi的存储结果，直到第n行的所有像素都被处理并且第n + 1行中的所有像素已被 扫描并存储，其中一旦针对像素Mi的处理完成，将第n + 1行的像素的扫描结果存储到先前由像素Mi占据的第i个存储位置。 基于该方法，存储容量只需要能够将扫描方向上的一行数据存储在图像中，从而节省用于双向扫描的存储。 该方法可以优化用于实现误差扩散的硬件，提高运行效率。 还公开了一种用于实现该方法的系统。

公开(公告)号：US20110279872A1

公开(公告)日：2011-11-17

申请号：US13124708

申请日：2009-10-19

申请人： Haifeng Li ,  Shixiong Ma ,  Bin Yang ,  Lidong Wang

发明人： Haifeng Li ,  Shixiong Ma ,  Bin Yang ,  Lidong Wang

IPC分类号： H04N1/405

CPC分类号： H04N1/52

摘要： An image processing method includes: generating a stochastic screening dither matrix (S101); performing a centered positive-negative conversion operation on the stochastic screening dither matrix (S102); generating a screen dot dither contrast matrix for each color surface according to the stochastic screening dither matrix after being subjected to the positive-negative conversion operation and a stochastic screening dither threshold set for each color surface of an image; performing a logical “and” operation between each data item in a one-bit amplitude modulation screen dot matrix of each color surface of the image and a data item at a corresponding position in the screen dot dither contrast matrix of the color surface, and using a result as a processed value of a corresponding data item in the one-bit amplitude modulation screen dot matrix of the color surface. An apparatus corresponding to the image processing method is also provided. According to the above-described image processing method and apparatus, the problem in the prior art of an excess of pure-color pixels existing in an original one-bit dot matrix can be resolved.

摘要翻译： 一种图像处理方法包括：产生随机筛选抖动矩阵（S101）; 对随机筛选抖动矩阵执行中心正负转换操作（S102）; 根据随机筛选抖动矩阵在进行正负转换操作之后产生每个颜色表面的屏幕点抖动对比度矩阵，以及为图像的每个颜色表面设置的随机屏蔽抖动阈值; 在图像的每个颜色表面的一位幅度调制屏幕点阵中的每个数据项之间执行逻辑“和”操作，以及在颜色表面的屏幕点抖动对比矩阵中的相应位置处的数据项，并且使用 作为颜色表面的一位幅度调制屏幕点阵中的相应数据项的处理值的结果。 还提供了与图像处理方法对应的装置。 根据上述图像处理方法和装置，可以解决现有技术中存在于原始一位点阵中的纯色像素的过剩问题。

公开(公告)号：US08023152B2

公开(公告)日：2011-09-20

申请号：US11912846

申请日：2005-11-02

申请人： Haifeng Li ,  Bin Yang ,  Shixiong Ma

发明人： Haifeng Li ,  Bin Yang ,  Shixiong Ma

IPC分类号： H04N1/405

CPC分类号： H04N1/4052 ,  H04N1/4055

摘要： The present invention relates to a method for producing halftone dots in the field of image hard copying, more particularly to a method for frequency-modulation screening using error diffusion based on dual-feedback. In the known frequency-modulation and amplitude-modulation screening technology, it is hard to output a halftone image with high quality using an output equipment with a low resolution (600 dpi) and the satisfactory effect of representing the gradations of the original image in detail and holding the smoothness of the original image can not be achieved. By using the dual-feedback technology based on a basic algorithm of the error distribution, the method in the present invention realizes the organic combination of the conventional frequency-modulation and amplitude-modulation screens and achieves the effect of mixed screening. The method in the present invention can effectively solve the problem of losing gradations of dots in an output equipment with low resolution and can reduce the moire caused by the random distribution characteristic so as to output halftone images with high quality and full gradations.

摘要翻译： 本发明涉及一种在图像硬拷贝领域制造半色调点的方法，更具体地说，涉及一种使用基于双重反馈的误差扩散进行频率调制筛选的方法。 在已知的调频和幅度调制技术中，使用低分辨率（600dpi）的输出设备输出具有高品质的半色调图像是困难的，并且具有令人满意的效果，其表示原始图像的灰度 并保持原始图像的平滑度无法实现。 通过使用基于误差分布的基本算法的双反馈技术，本发明的方法实现了常规频率调制和幅度调制屏幕的有机组合，并实现了混合筛选的效果。 本发明的方法可以有效地解决在分辨率低的输出设备中丢失点的灰度的问题，并且可以减少由随机分布特性引起的波纹，从而输出具有高质量和全等级的半色调图像。

公开(公告)号：US20080170267A1

公开(公告)日：2008-07-17

申请号：US11912846

申请日：2005-11-02

申请人： Haifeng Li ,  Bin Yang ,  Shixiong Ma

发明人： Haifeng Li ,  Bin Yang ,  Shixiong Ma

IPC分类号： H04N1/405

CPC分类号： H04N1/4052 ,  H04N1/4055

摘要： The present invention relates to a method for producing halftone dots in the field of image hard copying, more particularly to a method for frequency-modulation screening using error diffusion based on dual-feedback. In the known frequency-modulation and amplitude-modulation screening technology, it is hard to output a halftone image with high quality using an output equipment with a low resolution (600 dpi) and the satisfactory effect of representing the gradations of the original image in detail and holding the smoothness of the original image can not be achieved. By using the dual-feedback technology based on a basic algorithm of the error distribution, the method in the present invention realizes the organic combination of the conventional frequency-modulation and amplitude-modulation screens and achieves the effect of mixed screening. The method in the present invention can effectively solve the problem of losing gradations of dots in an output equipment with low resolution and can reduce the moire caused by the random distribution characteristic so as to output halftone images with high quality and full gradations.

摘要翻译： 本发明涉及一种在图像硬拷贝领域制造半色调点的方法，更具体地说，涉及一种使用基于双重反馈的误差扩散进行频率调制筛选的方法。 在已知的调频和幅度调制技术中，使用低分辨率（600dpi）的输出设备输出具有高品质的半色调图像是困难的，并且具有令人满意的效果，其表示原始图像的灰度 并保持原始图像的平滑度无法实现。 通过使用基于误差分布的基本算法的双反馈技术，本发明的方法实现了常规频率调制和幅度调制屏幕的有机组合，并实现了混合筛选的效果。 本发明的方法可以有效地解决在分辨率低的输出设备中丢失点的灰度的问题，并且可以减少由随机分布特性引起的波纹，从而输出具有高质量和全等级的半色调图像。

公开(公告)号：US20140033937A1

公开(公告)日：2014-02-06

申请号：US13996967

申请日：2011-12-24

申请人： Haifeng Li ,  Bin Yang

发明人： Haifeng Li ,  Bin Yang

IPC分类号： G03F5/20

CPC分类号： G03F5/20 ,  H04N1/4055

摘要： The present application provides a screen method for intaglio printing, comprising: dividing multiple classes of regions according to a brightness range; and generating screen dots with various screen patterns for the grouped classes of regions. The present application also provides a screen device for intaglio printing, comprising: a dividing module configured to group multiple classes of regions according to the brightness range; and a generating module configured to generate screen dots with various screen patterns for the grouped classes of regions. Since multiple kinds of screen patterns are applied in the technical solutions in present application, the problem, i.e., water ripple will occur in the prior art, may be addressed, so as to improve the quality of printing.

摘要翻译： 本申请提供了一种用于凹版印刷的屏幕方法，包括：根据亮度范围划分多个类别的区域; 并且为分组的区域类别生成具有各种屏幕图案的屏幕点。 本申请还提供了一种用于凹版印刷的屏幕装置，包括：分割模块，被配置为根据亮度范围对多个类别的区域进行分组; 以及生成模块，被配置为生成用于所述分组的区域类别的各种屏幕图案的屏幕点。 由于在本申请中的技术方案中应用了多种屏幕图案，所以可以解决现有技术中出现的水波纹问题，以提高打印质量。

公开(公告)号：US08045233B2

公开(公告)日：2011-10-25

申请号：US12091287

申请日：2006-04-29

申请人： Haifeng Li ,  Bin Yang

发明人： Haifeng Li ,  Bin Yang

IPC分类号： G06K15/00

CPC分类号： H04N1/4057 ,  H04N1/4053

摘要： Disclosed is a method for controlling the shapes of FM-AM mixed halftone dots on the multi-bit depth imaging apparatus. In the prior art, since the reproduction of the shapes of the dots in various gradations is absolutely based on the theory of random error diffusion and is influenced by the dynamic controlling output mechanism for the multi-bit dots, it is hard to assure the controllability of the shapes of the dots in a certain gradation. Based on the prior art, the dynamic statistic algorithm with adjacent output gray levels is introduced to assure the controllability of the shapes of the dots and solve the problem of random change of the shapes of the dots due to the randomicity of the error diffusion. According to the disclosed method, the features of the multi-bit imaging apparatus can be achieved fully in light of the requirements of the dots on the basis of the original method for multi-bit FM-AM mixed screening using error diffusion based on dual-feedback. The effect of FM-AM mixed halftone screening can be achieved under low resolution with controllable shapes of the dots. The problem of granular sensation can be solved during the practical output of the mixed halftone dots so as to assure the smooth effect of the gradations.

摘要翻译： 公开了一种用于在多位深度成像装置上控制FM-AM混合网版点的形状的方法。 在现有技术中，由于各种等级的点的形状的再现绝对基于随机误差扩散的理论，并且受到多位点的动态控制输出机制的影响，难以确保可控性 的一些等级的点的形状。 基于现有技术，引入具有相邻输出灰度级的动态统计算法，以确保点的形状的可控性，并解决由于误差扩散的随机性引起的点形状的随机变化的问题。 根据所公开的方法，可以根据基于双位FM-AM混合筛选的原始方法的点的要求，充分实现多比特成像装置的特征， 反馈。 FM-AM混合半色调筛选的效果可以在低分辨率下实现，具有可控形状的点。 混合色调点的实际输出可以解决颗粒感觉的问题，以确保灰度的平滑效果。

公开(公告)号：US08035860B2

公开(公告)日：2011-10-11

申请号：US12091290

申请日：2006-04-29

申请人： Haifeng Li ,  Bin Yang

发明人： Haifeng Li ,  Bin Yang

IPC分类号： H04N1/405

CPC分类号： H04N1/40087 ,  H04N1/4053

摘要： Disclosed is a method for processing FM-AM mixed halftone images on a multi-bit depth imaging apparatus, which relates to a method for producing halftone dots in the field of image hard copying. In the prior art, since it is hard to avoid the impact of the error diffusion for the output apparatus to control the mixed dots with multi-bit imaging depth based on the error diffusion, the output of the mixed dots with multi-bit imaging depth cannot satisfy requirements of the apparatus. According to the method of the present invention, the dynamic algorithm for controlling the multi-bit mixed dots is used for screening based on the existing mixed screening process using dual-feedback error diffusion. Furthermore, multi-bit halftone images with high quality and rich gradations can be output by the multi-bit depth imaging apparatus. The method of the present invention can solve the phenomenon of sawtooth in the margins of the mixed dots output by the conventional single-bit apparatus and obtain the FM-AM mixed dots with the effect of high resolution and continuous gradations, which are output under low resolution.

摘要翻译： 公开了一种在多位深度成像装置上处理FM-AM混合半色调图像的方法，涉及在图像硬拷贝领域中制造半色调点的方法。 在现有技术中，由于难以避免输出装置的误差扩散对基于误差扩散控制具有多位成像深度的混合点的影响，所以具有多位成像深度的混合点的输出 不能满足设备的要求。 根据本发明的方法，基于使用双反馈误差扩散的现有混合筛选过程，将用于控制多比特混合点的动态算法用于筛选。 此外，多比特深度成像装置可以输出具有高质量和丰富等级的多比特半色调图像。 本发明的方法可以解决常规单位装置输出的混合点边缘中的锯齿现象，并获得具有高分辨率和连续灰度的FM-AM混合点，其输出低 解析度。

公开(公告)号：US08861034B2

公开(公告)日：2014-10-14

申请号：US14128351

申请日：2012-05-18

申请人： Haifeng Li ,  Bin Yang

发明人： Haifeng Li ,  Bin Yang

IPC分类号： G06K15/00 ,  H04N1/405 ,  H04N1/40 ,  G06K15/02

CPC分类号： G06K15/1881 ,  H04N1/40087 ,  H04N1/4055

摘要： The present application discloses a method and an apparatus for generating multi-bit depth halftone amplitude-modulation dots. The method may comprise: scanning an input image to obtain a value of a current pixel Pxy, where x represents a lateral position index of the current pixel, and y represents a vertical position index of the current pixel; obtaining gj from a preset multi-bit depth threshold matrix G by starting with i=0, and determining if Pxy

摘要翻译： 本申请公开了一种用于产生多位深度半色调幅度调制点的方法和装置。 该方法可以包括：扫描输入图像以获得当前像素Pxy的值，其中x表示当前像素的横向位置索引，y表示当前像素的垂直位置索引; 通过以i = 0开始从预设的多位深度阈值矩阵G获得gj，并且确定Pxy

公开(公告)号：US08462390B2

公开(公告)日：2013-06-11

申请号：US13124708

申请日：2009-10-19

申请人： Haifeng Li ,  Shixiong Ma ,  Bin Yang ,  Lidong Wang

发明人： Haifeng Li ,  Shixiong Ma ,  Bin Yang ,  Lidong Wang

IPC分类号： H04N1/52

CPC分类号： H04N1/52

摘要： An image processing method includes: generating a stochastic screening dither matrix (S101); performing a centered positive-negative conversion operation on the stochastic screening dither matrix (S102); generating a screen dot dither contrast matrix for each color surface according to the stochastic screening dither matrix after being subjected to the positive-negative conversion operation and a stochastic screening dither threshold set for each color surface of an image; performing a logical “and” operation between each data item in a one-bit amplitude modulation screen dot matrix of each color surface of the image and a data item at a corresponding position in the screen dot dither contrast matrix of the color surface, and using a result as a processed value of a corresponding data item in the one-bit amplitude modulation screen dot matrix of the color surface. An apparatus corresponding to the image processing method is also provided. According to the above-described image processing method and apparatus, the problem in the prior art of an excess of pure-color pixels existing in an original one-bit dot matrix can be resolved.

摘要翻译： 一种图像处理方法包括：产生随机筛选抖动矩阵（S101）; 对随机筛选抖动矩阵执行中心正负转换操作（S102）; 根据随机筛选抖动矩阵在进行正负转换操作之后产生每个颜色表面的屏幕点抖动对比度矩阵，以及为图像的每个颜色表面设置的随机屏蔽抖动阈值; 在图像的每个颜色表面的一位幅度调制屏幕点阵中的每个数据项之间执行逻辑“和”操作，以及在颜色表面的屏幕点抖动对比矩阵中的相应位置处的数据项，并且使用 作为颜色表面的一位幅度调制屏幕点阵中的相应数据项的处理值的结果。 还提供了与图像处理方法对应的装置。 根据上述图像处理方法和装置，可以解决现有技术中存在于原始一位点阵中的纯色像素的过剩问题。