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    • 5. 发明授权
    • Method for generating a threshold value matrix for frequency modulated half-toning
    • 用于生成调频半色调阈值矩阵的方法
    • US07505177B2
    • 2009-03-17
    • US11289145
    • 2005-11-29
    • Jörg Olaf Von WechgelnMichael Hansen
    • Jörg Olaf Von WechgelnMichael Hansen
    • H04N1/405
    • H04N1/4051
    • A method for generating a threshold value matrix is used in the frequency-modulated half-toning of the image data to be reproduced. A threshold value matrix for a basic screen is generated in that low-pass filters of different width are applied to the bit patterns generated and the threshold value distribution is changed on the basis of the filtered results. Furthermore, the bit patterns generated are examined for specific part patterns and the threshold value distribution is changed in such a way that undesired part patterns no longer occur and, instead, desired part patterns, preferably rounded forms, are contained in the bit patterns generated. By use of a combination of scaling and/or rotation and/or mirroring of the threshold value matrix of the basic screen, threshold value matrices are generated for the printing inks.
    • 在要再现的图像数据的调频半色调中使用生成阈值矩阵的方法。 产生用于基本屏幕的阈值矩阵,因为不同宽度的低通滤波器被应用于所生成的位图案,并且基于滤波结果改变阈值分布。 此外,针对特定部位模式检查所产生的位模式,并且以不再发生不期望的部分模式的方式改变阈值分布,并且相反地,在生成的位模式中包含期望的部分模式,优选舍入形式。 通过使用基本屏幕的阈值矩阵的缩放和/或旋转和/或镜像的组合,为印刷油墨生成阈值矩阵。
    • 8. 发明授权
    • Ventilation system
    • 通风系统
    • US6102793A
    • 2000-08-15
    • US149868
    • 1998-09-08
    • Michael Hansen
    • Michael Hansen
    • F24F11/00
    • F24F11/0001F24F11/0017Y02B30/78
    • A ventilation system connected to a source of power for sensing a condition of air in an area monitored by said system and exchanging the air with fresh air upon sensing said condition. The ventilation system includes at least one strategically positioned sensor for sensing a characteristic in the air in the monitored area and comparing the characteristic to predetermined limit values and a fan for ventilating the monitored area. The fan is connected to the source of voltage by a connecting device upon a determination by the sensor that the characteristic of the sensed air exceeds the predetermined limit thereby causing the fan to remove the air within the monitored area and replace it with fresh air. The sensor senses any one of heat, smoke, carbon dioxide, carbon monoxide, hydrogen sulfide, hydrogen cyanide, any detectable gas, any emergency condition and any combination thereof. The fan is positioned within an air duct in the monitored area which leads to a position outside the monitored area. The system also includes a reset button connected to selectively disconnect the fan from the source of power.
    • 连接到电源的通风系统,用于感测由所述系统监测的区域中的空气状况,并在检测到所述状况时与新鲜空气交换空气。 通风系统包括至少一个策略定位的传感器,用于感测被监视区域中的空气中的特性并将该特征与预定极限值进行比较,以及用于使监测区域通风的风扇。 风扇通过传感器确定感测到的空气的特性超过预定极限时通过连接装置连接到电压源,从而使风扇除去被监视区域内的空气并用新鲜空气替换。 传感器感测热,烟,二氧化碳,一氧化碳,硫化氢,氰化氢,任何可检测气体,任何紧急情况及其任何组合中的任何一种。 风扇位于受监控区域内的空气管道内,导致监控区域外的位置。 该系统还包括连接以选择性地将风扇与电源断开的复位按钮。