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    • 80. 发明授权
    • Microfilm search device
    • 微胶卷搜索装置
    • US6094253A
    • 2000-07-25
    • US187487
    • 1998-11-06
    • Hiroshi Tamura
    • Hiroshi Tamura
    • G03B21/11G03B27/52G03B23/02G03B23/12
    • G03B21/11
    • There is disclosed a microfilm search device for detecting the presence of frames from a density change in the running direction of a microfilm, in which even if a frame contains therein a portion having substantially the same density as that of an interspace between frames, the portion is prevented from being incorrectly determined as between-frames, and frames are correctly detected to prevent a search error. The device is provided with an encoder for outputting a sampling signal for each predetermined feeding amount of the microfilm; plural density sensors for detecting a film density in different positions along a width direction within a frame travel width to output density signals; a binarizing section for binarizing the density signals into binarized signals having a logic ZERO or ONE in synchronization with the sampling signal; a determination section for detecting the presence of frames using a logical product or a logical sum of the plural binarized signals to output a determination signal; and a searching section for searching for a desired frame based on the determination signal.
    • 公开了一种微缩胶卷搜索装置,用于根据微缩胶片的行进方向上的浓度变化来检测帧的存在,即使帧中包含与帧之间的间隙基本相同的密度部分, 被阻止被错误地确定为帧之间,并且帧被正确检测以防止搜索错误。 该装置设置有编码器,用于输出针对微缩胶片的每个预定进给量的采样信号; 多个密度传感器,用于在帧行进宽度内沿宽度方向的不同位置检测膜密度,以输出密度信号; 用于将密度信号二值化为具有与采样信号同步的逻辑“零”或“1”的二值化信号的二值化部分; 确定部分,用于使用多个二进制化信号的逻辑积或逻辑和来检测帧的存在,以输出确定信号; 以及搜索部分,用于基于确定信号搜索期望的帧。