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    Image enhancing method using mean-separate histogram equalization and a circuit therefor
    1.
    发明授权
    Image enhancing method using mean-separate histogram equalization and a circuit therefor 失效
    使用均值分割直方图均衡的图像增强方法及其电路

    公开(公告)号：US5963665A

    公开(公告)日：1999-10-05

    申请号：US813425

    申请日：1997-03-10

    Applicant: Young-taek Kim ,  Yong-hun Cho

    Inventor： Young-taek Kim ,  Yong-hun Cho

    IPC: H04N5/57 ,  G06T5/00 ,  G06T5/40 ,  G06K9/38

    CPC classification number: G06T5/009 ,  G06T5/40

    Abstract: An image enhancing method using a mean-separate histogram equalization method is disclosed. An input image signal is divided into two sub-images in a picture unit according to a mean level of the input image signal. Then, cumulative density functions for each of the sub-images are calculated. Afterwards, the input sample is mapped into two gray levels, each of which belongs to a first range and a second range, by using first and second transform functions defined by use of the cumulative density functions, respectively. Finally, one of two mapped levels is selected depending on the magnitude of the input sample. As a result, the brightness of the given image can be preserved while the contrast is enhanced.

    Abstract translation: 公开了一种使用均值分离直方图均衡方法的图像增强方法。 输入图像信号根据输入图像信号的平均电平被划分成图像单元中的两个子图像。 然后，计算每个子图像的累积密度函数。 之后，通过使用通过使用累积密度函数定义的第一和第二变换函数，将输入样本映射成两个灰度级，每个灰度级属于第一范围和第二范围。 最后，根据输入样本的大小选择两个映射级别之一。 结果，在增强对比度的同时可以保持给定图像的亮度。

    Bipolar plate and direct liquid feed fuel cell stack
    3.
    发明申请
    Bipolar plate and direct liquid feed fuel cell stack 有权
    双极板和直接液体进料燃料电池堆

    公开(公告)号：US20060115705A1

    公开(公告)日：2006-06-01

    申请号：US11287443

    申请日：2005-11-28

    Applicant: Kyoung Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

    Inventor： Kyoung Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

    IPC: H01M8/02 ,  H01M8/10 ,  H01M8/24

    CPC classification number: H01M8/2455 ,  H01M8/0258 ,  H01M8/0263 ,  H01M8/1009 ,  H01M8/241

    Abstract: A bipolar plate and a direct liquid feed fuel cell stack are provided. The bipolar plate includes a manifold that is coupled with the fuel/oxidant path holes and a plurality of flow channels that are coupled with the manifold. The flow channels are divided into a plurality of groups, where the flow channel of each group forms a serpentine flow path and a length of each flow channel is substantially the same.

    Abstract translation: 提供了双极板和直接液体进料燃料电池堆。 双极板包括与燃料/氧化剂通道孔耦合的歧管和与歧管联接的多个流动通道。 流动通道被分成多个组，其中每组的流动通道形成蛇形流动路径，并且每个流动通道的长度基本相同。

    Bipolar plate and direct liquid feed fuel cell stack
    4.
    发明授权
    Bipolar plate and direct liquid feed fuel cell stack 有权
    双极板和直接液体进料燃料电池堆

    公开(公告)号：US08119306B2

    公开(公告)日：2012-02-21

    申请号：US11287443

    申请日：2005-11-28

    Applicant: Kyoung Hwan Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

    Inventor： Kyoung Hwan Choi ,  Jong-koo Lim ,  Yong-hun Cho ,  Il Moon

    IPC: H01M8/02 ,  H01M8/10 ,  H01M8/04

    CPC classification number: H01M8/2455 ,  H01M8/0258 ,  H01M8/0263 ,  H01M8/1009 ,  H01M8/241

    Abstract: A bipolar plate and a direct liquid feed fuel cell stack are provided. The bipolar plate includes a manifold that is coupled with the fuel/oxidant path holes and a plurality of flow channels that are coupled with the manifold. The flow channels are divided into a plurality of groups, where the flow channel of each group forms a serpentine flow path and a length of each flow channel is substantially the same.

    Abstract translation: 提供了双极板和直接液体进料燃料电池堆。 双极板包括与燃料/氧化剂通道孔耦合的歧管和与歧管联接的多个流动通道。 流动通道被分成多个组，其中每组的流动通道形成蛇形流动路径，并且每个流动通道的长度基本相同。

    Image format converting method and apparatus
    6.
    发明授权
    Image format converting method and apparatus 失效
    图像格式转换方法和装置

    公开(公告)号：US06606423B2

    公开(公告)日：2003-08-12

    申请号：US08961944

    申请日：1997-10-31

    Applicant: Yong-hun Cho

    Inventor： Yong-hun Cho

    IPC: G06K932

    CPC classification number: G06T3/4007

    Abstract: An image format converting method and apparatus are provided. The image format converter includes a pre-filter for pre-filtering the input image and for outputting a pre-filtered signal, and a format converter for bi-linear interpolating the pre-filtered signal, according to a predetermined aspect ratio, and for outputting a format converted signal. Therefore, the image format converter can have simple structure by adding the pre-filter, before the format converter using simple bi-linear interpolation, so that the image can be enlarged or reduced while remaining distinct and without aliasing.

    Abstract translation: 提供了一种图像格式转换方法和装置。 图像格式转换器包括用于对输入图像进行预滤波和用于输出预滤波信号的预滤波器，以及用于根据预定宽高比双向线性内插预滤波信号的格式转换器，并用于输出 格式转换信号。 因此，在格式转换器使用简单的双线性插值之前，图像格式转换器可以通过添加预滤波器具有简单的结构，使得图像可以被放大或缩小，同时保持不同且没有混叠。

    Image enhancing method using mean-matching histogram equalization and a circuit therefor
    7.
    发明授权
    Image enhancing method using mean-matching histogram equalization and a circuit therefor 失效
    使用均值匹配直方图均衡的图像增强方法及其电路

    公开(公告)号：US5862254A

    公开(公告)日：1999-01-19

    申请号：US819029

    申请日：1997-03-17

    Applicant: Young-taek Kim ,  Yong-hun Cho

    Inventor： Young-taek Kim ,  Yong-hun Cho

    IPC: H04N5/57 ,  G06T5/00 ,  G06T5/40 ,  G06K9/00

    CPC classification number: G06T5/009 ,  G06T5/40

    Abstract: A histogram-equalization method and circuit for enhancing an image signal represented by a predetermined number of gray levels is presented. The method calculates a cumulative density function and a mean level in a unit of a picture, and maps an input sample into a new gray level according to a transform function which is defined by use of the cumulative density function and the mean level. The method may also include a step of obtaining a compensated mean level by adding to the mean brightness level, so that the input sample is mapped into the compensated mean level according to the mean level. Thus, a brightness compensation may be carried out along with the contrast enhancement of the image.

    Abstract translation: 提出了一种用于增强由预定数量的灰度级表示的图像信号的直方图均衡方法和电路。 该方法以图像为单位计算累积密度函数和平均电平，并且根据通过使用累积密度函数和平均电平定义的变换函数将输入样本映射到新的灰度级。 该方法还可以包括通过添加到平均亮度水平来获得补偿平均水平的步骤，使得输入样本根据平均水平被映射到补偿平均水平。 因此，可以与图像的对比度增强一起执行亮度补偿。

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