Description: 指纹图像的质量测量与评价,在指纹图像分割、增强及指纹匹配等环节都有重要应用. 同时,指纹图像的质量分类,对指纹识别算法的适用性研究也有重要意义. 本文提出一种基于支持向量机的指纹图像质量分类方法.该方法选择梯度、Gabor特征、方向对比度等指标,利用支持向量机有效实现指纹图像质量分类. 并采用少类样本合成过采样技术( SMOTE)降低指纹图像质量好坏的类别不平衡问题对分类的影响. 理论分析和实验结果都表明该方法能够较为有效地提高指纹图像质量分类的正确率.-Fingerprint Image Quality Measurement and evaluation, in the fingerprint image segmentation, enhancement and fingerprint matching has important applications such links. Meanwhile, the quality of fingerprint image classification, on the applicability of fingerprint recognition algorithm is also important. In this paper, based on support vector machine classification of fingerprint image quality. The method chosen gradient, Gabor features, such as indicators of the direction of contrast, the effective use of support vector machine classification of fingerprint image quality. and use a small sample of synthetic over-sampling technique class (SMOTE) lower quality fingerprint image the type of imbalance bad influence on the classification. Theoretical analysis and experimental results show that the method can be used effectively to improve the quality of fingerprint image classification accuracy. Platform: |
Size: 564224 |
Author:郭事业 |
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Description: 指纹识别源码，利用梯度法求解指纹的块方向图，很好用-Fingerprint fingerprint source using gradient method with the block pattern well Platform: |
Size: 4975616 |
Author:宋琦 |
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Description: 给定一个归一化的指纹图像，算法的主要步骤如下：
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** 1 - 将G分成大小为 w x w - (15 x 15) 的块；
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** 2 - 计算每个象素 (i,j)的梯度 dx(i,j) 和 dy(i,j) ,
** 根据计算的需求，梯度算子可以从简单的Sobel算子到复杂的Marr-Hildreth 算子。
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** 3 - 估算优势方向(i,j)-Given a normalized fingerprint image, the algorithm' s main steps are as follows:**** 1- The size of G into wxw- (15 x 15) blocks **** 2- calculated for each pixel (i , j) of the gradient dx (i, j) and dy (i, j),** according to the needs of computing the gradient operator can be from simple to complex Sobel operator Marr-Hildreth operator.**** 3- estimated dominant directions (i, j) Platform: |
Size: 1629184 |
Author:zhangbao369 |
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Description: 指纹模式识别预处理演示（特征点获取）
包括梯度方向场确认 图像分割二值化细化处理 标记特征点演示-Fingerprint pattern recognition preprocessing Demo (feature points to obtain), including the direction of field gradient confirmed the binary segmentation of feature points marked thinning demonstration Platform: |
Size: 3755008 |
Author:renee |
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Description: 指纹处理的这个过程代码，有梯度，方向场，分割，均衡，收敛，平滑，增强，二值化，细化和特征点标记的功能。下载即可用.rar-Fingerprint processing of the process code, gradient, direction of the market, segmentation, balance, convergence, smoothing, enhancement, binarization, thinning, and feature points marked feature. You can use to download. Rar Platform: |
Size: 543744 |
Author:lili |
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Description: 梯度方向角量化旋转匹配，可用于指纹识别等方面。-Quantify the rotation angle gradient direction matching, can be used for fingerprint identification and other aspects. Platform: |
Size: 1024 |
Author:彭赛丽 |
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Description: 用于指纹检测等，利用图像的梯度方向，获得局部主导方向。Principal Component Analysis （PCA），包含有高斯金字塔分层，SVD奇异值分解，内含测试图像-Used for fingerprint detection, etc. Using the gradient direction of image to get local leading direction. Principal Component Analysis (PCA), contains a gaussian pyramid stratification, SVD singular value decomposition, containing test image. Platform: |
Size: 243712 |
Author:liuguorong |
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Description: Sunil Lee and Chang D. Yoo: Video Fingerprinting Based on Centroids of Gradient Orientations
Fingerprints are feature vectors that can uniquely characterize the video signal. The goal of a video fingerprinting system is to judge whether two videos have the same contents by measuring distance between fingerprints extracted from the videos. In this paper, a novel video fingerprinting method based on the centroids of gradient orientations is proposed. The centroid of gradient orientations is chosen due to its reliability and robustness against common video processing steps. A threshold used to reliably determine a fingerprint match is theoretically derived, and its validity is experimentally verified. The experimental results show that the proposed fingerprint is not only pairwise independent but also robust against common video processing steps. Platform: |
Size: 69632 |
Author:Tilka |
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Description: 基于MFC的指纹图像处理识别代码,能够实现指纹图像求梯度值，方向场，均衡化，增强，二值化，细化等功能-Fingerprint image processing recognition based on the MFC code, can realize the fingerprint image gradient value, direction, equalization, enhancement, binarization, thinning, and other functions Platform: |
Size: 26552320 |
Author:sunfeilong |
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Description: 梯度法计算指纹方向场，采用了三种方式：1、滑动块 2、自适应块 3、分割固定块(Gradient method is used to calculate the direction field of fingerprint, and three methods are adopted: 1, sliding block 2, adaptive block 3 and segmentation fixed block) Platform: |
Size: 3072 |
Author:HDU_LGL
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Description: 纹理识别，LTV，通过求梯度，进而求图像的局部总变差，对指纹图像进行纹理提取(Texture recognition, LTV, by seeking gradient, and then find the local image of the total variation, the fingerprint image texture extraction) Platform: |
Size: 1024 |
Author:牛少007
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Search - fingerprint gradient