Off-Line Verification of Japanese Signatures after Elimination of Background Patterns
Off-Line Verification of Japanese Signatures after Elimination of Background Patterns
复制标题
消除背景图案后的日文签名离线验证
DOI：
10.1142/s0218001494000371
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
M. Yoshimura
中科院分区：
文献类型：
--
作者：
I. Yoshimura;M. Yoshimura
本文提出了一个由预处理和验证两部分组成的离线签名验证系统。假设每个签名都写在具有背景图案的表面上，并且背景图案的样本是可用的。从签名图像中消除背景图案的预处理阶段包括5个步骤：签名图像和背景图像之间的位置调整，通过局部最大化对背景图案进行滤波，从背景图案中剪切随机噪声，通过减法和阈值化将多级签名图像变换为二值签名图像来消除背景，以及用于缺陷恢复和孤立噪声消除的平滑。预处理操作的效果如图所示。预处理阶段之后的验证阶段基于参考文献7中提出的弧模式方法。最后通过实验验证了该系统的性能。在实验中使用了20个日本签名，其中20个真实签名，10个真实的反签名和10个伪造的反签名。该实验实现了低至约14%的错误率。
A system of off-line signature verification composed of a preprocessing stage and a verification stage is proposed in this paper. It is assumed that each signature is written on a surface with a background pattern and a sample of the background pattern is available. The preprocessing stage to eliminate the background pattern from a signature image consists of 5 steps: the position adjustment between a signature image and a background image, the filtering of the background pattern by local maximization, the clipping of random noises from the background pattern, the background elimination by transformation of the multilevel signature image to a binary signature image through subtraction and thresholding, and the smoothing for defects recovery and isolated noise elimination. The effect of the preprocessing operation is illustrated in figures. The verification stage following the preprocessing stage is based on the Arc Pattern Method proposed in Ref. 7. An experiment is performed to examine the performance of the proposed system. Twenty Japanese autographs, for which 20 authentic signatures, 10 genuine counter signatures and 10 forged counter signatures are provided, are used in the experiment. The experiment achieved an error rate of as low as approximately 14%.