| 1. | Study on extraction method of directional information for fingerprint image
指纹图像方向信息提取方法 |
| 2. | A novel fingerprint image binarization algorithm based on orientation information
一种结合方向信息的指纹图像二值化算法 |
| 3. | We proposed a singular point extraction algorithm based on multi - characters . it uses direction information , neighborhood information and human experience to find singular point
提出了一种基于多特征的奇异点提取算法，利用奇异点的方向信息和邻域特性以及经验知识寻找奇异点。 |
| 4. | Then combining with the information of local ridge direction , special algorithms are designed with respect to various noises to delete pseudo minutiae from original minutiae set
并结合局部纹线方向信息，针对不同的噪声采用针对性的算法，将各类噪声引起的伪特征点分别予以删除。 |
| 5. | During the procedure of fingerprint image processing , the calculation of orientation plays the key role , almost all of the following steps rely on its results . it decides the system ' s performance
在指纹信息处理中，指纹图像方向场的计算是非常关键的，其后几乎的所有工作都离不开方向信息，方向场计算的准确与否关系到整个系统的性能。 |
| 6. | Explicitly if you want this behavior . without these directional attributes , the interop marshaler does not export directional information to the type library it exports as in , which is the default and this can cause problems with com cross - apartment marshaling
如果没有这些方向属性， interop封送拆收器就不会将方向信息导出到类型库（默认情况下它作为in导出） ，这在进行com跨单元封送处理时会导致问题。 |
| 7. | A method independent of the orientation information is presented based on gray level similarity of a local area and its sub - samplings , computing the minimum size of the sampling with the grey level similarity , and eventually , the ridge frequency related the sampling size is obtained
摘要提出了一种独立于纹线方向信息的方法，根据指纹整体与局部在灰度的相似性，求出具有该相似性的最小局部的尺寸，从而得到相应的纹线密度。 |
| 8. | This paper completely pay respect to the two characters in the ridge ' s binarization step . and in this paper , we using the information of the pixel ' s grads which in the fingerprint ' s digital image and propose an approach that we can confirm the block ' s orientation
本文在脊线二值化过程中充分考虑了这两个特性，并且利用指纹图像中点梯度的方向信息，提出了用相位编组法确定块方向，然后基于块方向进行方向滤波，收到了较好的效果。 |
| 9. | With the distinguishing characteristics of character " s texture ( such as horizontal lines , vertical lines , or slant lines in a character ) that can be extracted directly , the character - regions are segmented from their background quickly , and the image - noises rising during the processing period can be removed by morphological filter
首先提取字符的横向、竖向纹理的方向信息，然后根据各自的阈值把候选字符区标识出来，用形态滤波的方法消除噪声，最后用斜向纹理的平均斜向能量判断是否是字符区。 |
| 10. | Through the experimental result of the various methods of pretreatment , the effects were illuminated ; appraisal of every kind pretreatment method was given ; the optimal scheme of enhanced fingerprints based on the fourier transform and direction information was determined , and the standard of the comparing pretreatment algorithm was proposed
通过实验说明了各种指纹预处理方法的效果；结合特征点变化，给出了各种预处理方法的评价；确定了基于傅里叶变换结合滤波和方向信息的频域滤波增强指纹的最佳方案，并提出了比较预处理算法的标准。 |
