自动指纹识别系统一般包括指纹图像采集，预处理，特征提取和比对。
Automatic fingerprint identification system includes fingerprint image acquisition, image preprocessing, minutia extraction and minutia matching.
论文的第五章介绍了指纹图像采集设备及指纹识别开发包，描述了指纹识别功能模块的具体实现。
In chapter two of this dissertation, the fingerprint recognition technique is introduced, the development of fingerprint recognition, current situation, and the future is described;
自动指纹识别系统主要包括以下几个步骤：指纹图像采集、指纹图像前处理、细节特征提取、指纹图像匹配。
The fingerprint recognition system mainly concludes the following steps: collection of fingerprints, pre-processing of fingerprint image, minutiae extraction and fingerprint matching.
通过自动调节指纹放电参数的方法，保证了指纹图像采集的质量，使系统的指纹识别率得到了进一步的保证。
The quality of fingerprint drawing is ensured by automatically adjusting the fingerprint discharge parameters, and the rate of fingerprint recognition is also guaranteed in the system.
针对指纹识别中的指纹采集和预处理这两个关键问题，设计并实现了US B电容式指纹采集仪，保证了指纹图像采集的高质量。
Based on capacitive fingerprint sensor and USB bus interface, the capturing apparatus of fingerprint is designed and high quality of images is assured.
Burcham说：“这是采集的关键所在，因为如果你不用偏振光看一副图像，你会看到多种指纹图，然而这些都不是真实的”。
"That's where the real kicker is, because if you look at an image without any polarization, you can kind of see fingerprints, but not really well," says Burcham.
针对指纹图像的采集、处理、显示，提出一种性价比好且易于实现的基于PC机、单片机和可编程逻辑器件的硬件平台。
A kind of hardware platform based on PC, MCU and FPGA is given for fingerprint collection, processing and displaying. It has a good performance and easy to be achieved.
设计中采用了双节点上传指纹图像的方法，提高指纹图像的采集速度，从而减少验证时间，增强系统的可用度。
In the design, we adopt the method of transferring the fingerprint in double-points, to raise the speed of collecting the drawings, to reduce the verify time, to strengthen the usability.
采集指纹原始数据，建立了一个容量为4000枚指纹图像的指纹模板库。
In the fingerprint acquisition process, this paper built fingerprint image template database with 4000 images in it.
指纹采集仪采集的指纹图像质量对预处理及指纹识别的效率有很大的影响。
The efficiency that the dactylogram picture quality that dactylogram collects appearance identifies to pretreatment and dactylogram has very big effect.
新方法使用一种名为“大量光谱成像”的技术生成详细的化学特征，从多个不同的表面采集多种指纹图像。
The new method takes multiple images of a print from many different surfaces, using a technology called Mass Spectrometry Imaging to produce a detailed chemical signature.
但是在指纹识别领域，仍然存在一些值得深入研究的问题，例如指纹图像的采集技术，低质量指纹图像的预处理等。
However, there are still some challenging tasks further lucubrated in fingerprint recognition field, e. g. image acquisition, preprocessing of low quality images, and so on.
文中针对MBF200采集到的指纹图像的特点，讨论了一种用于嵌入式系统的指纹图像预处理算法。
Aiming at the feature of fingerprint image acquired by MBF200, an algorithm of fingerprint image pretreatment used in embedded system is discussed in this paper.
个体指纹被采集成指纹图像后，首先采用基于自身灰度均值和方差的规格化方法，降低指纹脊、谷线之间的灰度变化程度；
Based on the mean value and variance, the image normalizing is to reduce the variations of gray between fingerprint ridges and furrows;
个体指纹被采集成指纹图像后，首先采用基于自身灰度均值和方差的规格化方法，降低指纹脊、谷线之间的灰度变化程度；
Based on the mean value and variance, the image normalizing is to reduce the variations of gray between fingerprint ridges and furrows;
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