Memory efficient hierarchical error diffusion with color consistency constraints
    11.
    发明授权
    Memory efficient hierarchical error diffusion with color consistency constraints 有权
    内存有效的层次误差扩散与颜色一致性约束

    公开(公告)号:US08294952B2

    公开(公告)日:2012-10-23

    申请号:US12613069

    申请日:2009-11-05

    Inventor: Zhigang Fan Zhen He

    CPC classification number: H04N1/4052

    Abstract: A halftoning process includes: receiving CMYK input pixel data in terms of continuous tone input data values for cyan, magenta, yellow, and black colors converting the CMYK input pixel data to modified CMYKRGB* pixel data that define the input pixel in terms of error-adjusted continuous tone data values quantizing the modified CMYKRGB* pixel data to derive intermediate output CMYKRGB pixel data in which the cyan, magenta, yellow, black, red, green, and blue colors are each defined by either a first quantized value that represents no color or a second quantized pixel value that represents full color converting the intermediate output CMYKRGB pixel data to CMYK output data.

    Abstract translation: 半色调处理包括:根据用于青色,品红色,黄色和黑色的连续色调输入数据值接收CMYK输入像素数据,将CMYK输入像素数据转换为修正的CMYKRGB *像素数据, 量化改进的CMYKRGB *像素数据的经调整的连续色调数据值导出其中青色,品红色,黄色,黑色,红色,绿色和蓝色的中间输出CMYKRGB像素数据各自由表示无颜色的第一量化值 或表示将中间输出CMYKRGB像素数据转换为CMYK输出数据的全色的第二量化像素值。

    Minimizing dot graininess in dot-on-dot printing devices
    12.
    发明授权
    Minimizing dot graininess in dot-on-dot printing devices 有权
    最小化点对点打印设备的点粒度

    公开(公告)号:US08179568B2

    公开(公告)日:2012-05-15

    申请号:US12178960

    申请日:2008-07-24

    Applicant: Zhen He

    Inventor: Zhen He

    CPC classification number: H04N1/54

    Abstract: What is disclosed is a novel system and method for minimizing dot visibility in color marking devices capable of dot-on-dot printing. The present method achieves minimum dot visibility for a given dispersed-dot screen by performing a CMYK to CMYKRGB conversion which uses less visible dots as much as possible before more visible dots are introduced. The output color dot coverages are calculated sequentially to minimize the coverage of more visible dots in a decreasing order of brightness. Resulting images have noticeably reduced halftone graininess, particularly in the mid to darker tone areas. The present method is also computationally efficient.

    Abstract translation: 所公开的是一种用于最小化能够进行点对点打印的彩色标记装置中的点可视性的新型系统和方法。 本方法通过执行CMYK到CMYKRGB转换来实现给定分散点屏幕的最小点可视性,其在引入更多可见点之前尽可能多地使用较少的可见点。 按顺序计算输出颜色点覆盖,以按照降低的亮度顺序使更多可见点的覆盖范围最小化。 所得图像显着降低了半色调颗粒度,特别是在中等到深色调区域。 本方法在计算上也是有效的。

    MEMORY EFFICIENT HIERARCHICAL ERROR DIFFUSION WITH COLOR CONSISTENCY CONSTRAINTS

    公开(公告)号:US20110102848A1

    公开(公告)日:2011-05-05

    申请号:US12613069

    申请日:2009-11-05

    Inventor: Zhigang Fan Zhen He

    CPC classification number: H04N1/4052

    Abstract: A halftoning process for printing digital images includes: receiving CMYK input pixel data that define an input pixel of an input digital image in terms of continuous tone input data values for cyan, magenta, yellow, and black colors, wherein I(C), I(M), I(Y), I(K) respectively correspond to the continuous tone input data value for the cyan, magenta, yellow, and black colors; converting the CMYK input pixel data to modified CMYKRGB* pixel data that define the input pixel in terms of error-adjusted continuous tone data values for the cyan, magenta, yellow, and black colors, and also in terms of red, green and blue colors, wherein I*(C), I*(M), I*(Y), I*(K), I*(R), I*(G), I*(B) respectively correspond to the error-adjusted converted continuous tone input data values for the cyan, magenta, yellow, black, red, green, blue colors; quantizing the modified CMYKRGB* pixel data to derive intermediate output CMYKRGB pixel data in which the cyan, magenta, yellow, black, red, green, and blue colors are each defined by either a first quantized value that represents no color or a second quantized pixel value that represents full color, wherein O′(C), O′(M), O′(Y), O′(K), O′(R), O′(G), O′(B) respectively define said intermediate output pixel data for the cyan, magenta, yellow, black, red, green, and blue colors, and wherein the intermediate output CMYKRGB pixel data define an output pixel that corresponds to the input pixel; converting the intermediate output CMYKRGB pixel data to CMYK output data in which the output pixel is defined in terms of CMYK output values O(C), O(M), O(Y), O(K) respectively for the cyan, magenta, yellow, and black colors, wherein each of the CMYK output values is defined by either a first output value representing no color or a second output value representing full color.

    Electricity Generation Using Phototrophic Microbial Fuel Cells
    14.
    发明申请
    Electricity Generation Using Phototrophic Microbial Fuel Cells 审中-公开
    使用光养力微生物燃料电池的发电

    公开(公告)号:US20100196742A1

    公开(公告)日:2010-08-05

    申请号:US12695905

    申请日:2010-01-28

    CPC classification number: H01M8/16 Y02E60/527 Y02P70/56

    Abstract: A sediment-type self-sustained phototrophic microbial fuel cell for generating electricity through the syntrophic interaction between photosynthetic microorganisms and heterotrophic bacteria in algae cultivation ponds used for biodiesel production. The microbial fuel cell is operable to continuously produce electricity without the external input of exogenous organics or nutrients.

    Abstract translation: 一种用于生物柴油生产的藻类养殖池中的光合微生物和异养细菌之间的相互作用发生电的沉积型自持式光养微生物燃料电池。 微生物燃料电池可操作以不经外部输入的外源有机物或营养物质连续产生电力。

    COLOR STATUS DETECTION IN COLOR BINARY DOMAIN
    16.
    发明申请
    COLOR STATUS DETECTION IN COLOR BINARY DOMAIN 有权
    颜色二进制域中的颜色状态检测

    公开(公告)号:US20080079967A1

    公开(公告)日:2008-04-03

    申请号:US11537032

    申请日:2006-09-29

    Applicant: Zhen He

    Inventor: Zhen He

    CPC classification number: H04N1/642

    Abstract: A method to determine the color status of a scanned original segments a binary halftone image into a predetermined number of local windows and converts each local window to a device-independent color space. The method then determines a color space parameter for each local window and compares the color space parameters for the local windows to at least one threshold to determine the color status of the scanned original. An apparatus having a scanner creates a scanned image of an original and has at least one processor to create a binary halftone image from the scanned image, segment the binary halftone image into a predetermined number of local windows, convert each local window to a device-independent color space, determine a color space parameter for each local window, and compare the color space parameter for each local window to at least one threshold to determine the color status for the scanned original.

    Abstract translation: 确定扫描的原稿的颜色状态的方法将二进制半色调图像分割成预定数量的本地窗口,并将每个本地窗口转换为与设备无关的色彩空间。 该方法然后确定每个本地窗口的颜色空间参数,并将本地窗口的颜色空间参数与至少一个阈值进行比较,以确定扫描的原稿的颜色状态。 具有扫描器的装置产生原稿的扫描图像,并且具有至少一个处理器,用于从扫描图像创建二进制半色调图像,将二进制半色调图像分割成预定数量的本地窗口,将每个本地窗口转换为设备 - 独立颜色空间,确定每个本地窗口的颜色空间参数,并将每个本地窗口的颜色空间参数与至少一个阈值进行比较,以确定扫描原稿的颜色状态。

    Halftoning method and system
    19.
    发明申请
    Halftoning method and system 有权
    半色调方法和系统

    公开(公告)号:US20050162704A1

    公开(公告)日:2005-07-28

    申请号:US10764839

    申请日:2004-01-26

    CPC classification number: H04N1/405 H04N1/4057

    Abstract: A combined dot density (FM) and dot size (AM) modulation halftoning method and system produces a halftone in which both the density and size of the dots are modulated. In addition to modulating the dot size and density, the halftoning method can also explicitly control the size of dot clusters and different intensity levels.

    Abstract translation: 组合点密度(FM)和点尺寸(AM)调制半色调方法和系统产生调制了点的密度和尺寸的半色调。 除了调整点大小和密度之外,半色调方法还可以明确地控制点簇的大小和不同的强度级别。

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