【摘要】 利用一组平行采样直线,计算局部纹线周期。首先将整幅图像分块,在每个块内,做和块纹线方向垂直的一组平行采样直线,然后对每条直线上的像素二值化,通过此直线上纹脊和纹谷的宽度,计算出若干纹线周期,对这些纹线周期统计平均,作为该图像块的纹线周期。实验表明,本方法合理,可行的。更多还原

【Abstract】 Local fingerprint image ridge period is estimated based on a group of sampling lines.Firstly,the fingerprint image is divided into non-overlap blocks.In each block,a group of sampling lines are done alone the line normal to the ridge direction.Secondly,ridge period is computed through the ridge and valley distance after binarization of the pixels in the line.Thirdly, local ridge period is obtained by the statistical average of some ridge period in each block.The experiment results show the method is reasonable and feasible.更多还原