第66章 匹配成功

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  刚刚达到参加省厅级别的指纹会战要求,垫底的那种。
    而现在,陆川在做指纹鉴定分析的过程,让刘国栋颇有一种看省厅高级专家做指纹鉴定时候的感觉。
    知道在做什么,但是又不完全知道。
    就好像……进去了,又好像长度不够,没有完全进去。
    如果用一句话形容,那就是不明觉厉。
    叮!
    正想着,电脑扬声器传出特有的蜂鸣声。
    基本上天天和指纹比对系统打交道的刘国栋三人,对这声音太熟悉不过了。
    “成功了?”
    老白脸上闪过惊讶的表情,扑在屏幕上。
    “比对成功!”
    海州刑侦支队使用的指纹比对系统是从
    基本上每年都会进行系统升级。
    到目前,系统对指纹的比对,基本上有三种模式。
    俗称傻瓜模式。
    指纹经过预处理后,系统会根据事先标注出来的特征点,对数据库内的所有指纹都进行特征比对。
    这对指纹鉴定的要求比较低。
    因为只需要确定一个特征点,只要这个特征点,和其他指纹的相同特征点不同,就能判定失败。
    比对也就完成了。
    但是这样的比对,有一个问题,就是对指纹预处理的时候,特征点的选取要标准。
    选取标准,才有可能比对成功。
    选取的位置不标准,那就一定会失败。
    这就是为什么昨天晚上老白和杨森一直比对失败的原因。
    他们在对指纹进行预处理的时候,就没有成功,选取的特征点有问题。
    这也是最常用的一种鉴定分析方法,系统会根据指纹标注出的特征点,对数据库的指纹进行全匹配。
    然后根据特征点的相似程度,给出一个排名。
    当然,这不是说排在
    还需要对两枚指纹进行人工确认,如果能寻找出明显不同的特征点,这个比对就失败了。
    这种模式的好处是,系统会给几十甚至上百的相似指纹。
    这里边就很有可能有目标指纹,只是需要人工在进行核对。
    最后一种,就是陆川选择的指纹比对方式。
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